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How To Create A Simple REST API in PHP? Step By Step Guide!


Previously, we learned how to create, read, update and delete database records (CRUD operations) with our PHP, MySQL & OOP CRUD Tutorial.

Today, before we go to JavaScript programming, we will learn how to create a simple REST API in PHP. Enjoy our step-by-step tutorial below!

This post covers the following topics:

1.0 Project Overview
1.1 What is REST API?
1.2 Why do we need REST API?
1.3 Where REST API is used?
1.4 REST API in our tutorials

2.0 File structure

3.0 Setup the database
3.1 Create categories table
3.2 Dump data for categories table
3.3 Products table
3.4 Dump data for products table
3.5 Connect to database

4.0 Read products
4.1 Product object
4.2 Create file to read products
4.3 Connect to database and products table
4.4 Read products from the database
4.5 Add Product "read()" method
4.6 Tell the user no products found
4.7 Output

5.0 Create Product
5.1 Create create.php file
5.2 Product create() method
5.3 Output

6.0 Read One Product
6.1 Create read_one.php file
6.2 Product readOne() method
6.3 Output

7.0 Update product
7.1 Create “update.php” file
7.2 Product update() method
7.3 Output

8.0 Delete Product
8.1 Create “delete.php” file
8.2 Product delete() method
8.3 Output

9.0 Search Products
9.1 Create "search.php" file
9.2 Create "search()" method
9.3 Output

10.0 Paginate Products
10.1 Create "read_paging.php" file
10.2 Create "core.php" file
10.3 Create "readPaging()" method
10.4 Create "count()" method
10.5 Get "paging" array
10.6 Output

11.0 Read Categories
11.1 Category object
11.2 Create "read.php" file
11.3 Category "read()" method
11.4 Output

12.0 Download Source Codes
13.0 What's Next?
14.0 Related Tutorials
15.0 Notes

1.0 Project Overview

1.1 What is REST API?

To define "REST API", we have to know what is "REST" and what is "API" first. I'll do my best to explain it in simple terms because REST has a lot of concepts inside of it that could mean a lot of things.

REST stands for "REpresentational State Transfer". It is a concept or architecture for managing information over the internet. REST concepts are referred to as resources. A representation of a resource must be stateless. It is usually represented by JSON. This post is worth reading: How I Explained REST to My Wife?

API stands for "Application Programming Interface". It is a set of rules that allows one piece of software application to talk to another. Those "rules" can include create, read, update and delete operations. If you want to learn more, watch the video below and read the musiccritic's YouTube camera review if you interested on making some videos.

REST API enable your application to cooperate with one or several different applications using REST concepts. If you want to learn more, watch the video below.

1.2 Why do we need REST API?

In many applications, REST API is a need because this is the lightest way to create, read, update or delete information between different applications over the internet or HTTP protocol. This information is presented to the user in an instant especially if you use JavaScript to render the data on a webpage.

1.3 Where REST API is used?

REST API can be used by any application that can connect to the internet. If data from an application can be created, read, updated or deleted using another application, it usually means a REST API is used.

1.4 REST API in our tutorials

A REST API is needed for our JavaScript programming tutorials. This post will help you a lot with that need. Our JavaScript programming tutorials includes the following topics:

But don't mind those topics for now. We will do it one step at a time. You don't need to learn all of it as well. Just choose what you need to learn.

Also, please note that this PHP REST API is not yet in its final form. We still have some work to do with .htaccess for better URLs and more.

But one thing is for sure, this source codes is good enough and works for our JavaScript tutorials.

2.0 File structure

At the end of this tutorial, we will have the following folders and files.
├─ api/
├─── config/
├────── core.php - file used for core configuration
├────── database.php - file used for connecting to the database.
├─── objects/
├────── product.php - contains properties and methods for "product" database queries.
├────── category.php - contains properties and methods for "category" database queries.
├─── product/
├────── create.php - file that will accept posted product data to be saved to database.
├────── delete.php - file that will accept a product ID to delete a database record.
├────── read.php - file that will output JSON data based from "products" database records.
├────── read_paging.php - file that will output "products" JSON data with pagination.
├────── read_one.php - file that will accept product ID to read a record from the database.
├────── update.php - file that will accept a product ID to update a database record.
├────── search.php - file that will accept keywords parameter to search "products" database.
├─── category/
├────── read.php - file that will output JSON data based from "categories" database records.
├─── shared/
├────── utilities.php - file that will return pagination array.

3.0 Setup the database

Using PhpMyAdmin, create a new api_db database. Yes, api_db is the database name. After that, run the following SQL queries to create new tables with sample data.

3.1 Create categories table

CREATE TABLE IF NOT EXISTS `categories` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(256) NOT NULL,
  `description` text NOT NULL,
  `created` datetime NOT NULL,
  `modified` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB  DEFAULT CHARSET=utf8 AUTO_INCREMENT=19 ;

3.2 Dump data for categories table

INSERT INTO `categories` (`id`, `name`, `description`, `created`, `modified`) VALUES
(1, 'Fashion', 'Category for anything related to fashion.', '2014-06-01 00:35:07', '2014-05-30 17:34:33'),
(2, 'Electronics', 'Gadgets, drones and more.', '2014-06-01 00:35:07', '2014-05-30 17:34:33'),
(3, 'Motors', 'Motor sports and more', '2014-06-01 00:35:07', '2014-05-30 17:34:54'),
(5, 'Movies', 'Movie products.', '0000-00-00 00:00:00', '2016-01-08 13:27:26'),
(6, 'Books', 'Kindle books, audio books and more.', '0000-00-00 00:00:00', '2016-01-08 13:27:47'),
(13, 'Sports', 'Drop into new winter gear.', '2016-01-09 02:24:24', '2016-01-09 01:24:24');

3.3 Products table

CREATE TABLE IF NOT EXISTS `products` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `name` varchar(32) NOT NULL,
  `description` text NOT NULL,
  `price` decimal(10,0) NOT NULL,
  `category_id` int(11) NOT NULL,
  `created` datetime NOT NULL,
  `modified` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1 AUTO_INCREMENT=65 ;

3.4 Dump data for products table

INSERT INTO `products` (`id`, `name`, `description`, `price`, `category_id`, `created`, `modified`) VALUES
(1, 'LG P880 4X HD', 'My first awesome phone!', '336', 3, '2014-06-01 01:12:26', '2014-05-31 17:12:26'),
(2, 'Google Nexus 4', 'The most awesome phone of 2013!', '299', 2, '2014-06-01 01:12:26', '2014-05-31 17:12:26'),
(3, 'Samsung Galaxy S4', 'How about no?', '600', 3, '2014-06-01 01:12:26', '2014-05-31 17:12:26'),
(6, 'Bench Shirt', 'The best shirt!', '29', 1, '2014-06-01 01:12:26', '2014-05-31 02:12:21'),
(7, 'Lenovo Laptop', 'My business partner.', '399', 2, '2014-06-01 01:13:45', '2014-05-31 02:13:39'),
(8, 'Samsung Galaxy Tab 10.1', 'Good tablet.', '259', 2, '2014-06-01 01:14:13', '2014-05-31 02:14:08'),
(9, 'Spalding Watch', 'My sports watch.', '199', 1, '2014-06-01 01:18:36', '2014-05-31 02:18:31'),
(10, 'Sony Smart Watch', 'The coolest smart watch!', '300', 2, '2014-06-06 17:10:01', '2014-06-05 18:09:51'),
(11, 'Huawei Y300', 'For testing purposes.', '100', 2, '2014-06-06 17:11:04', '2014-06-05 18:10:54'),
(12, 'Abercrombie Lake Arnold Shirt', 'Perfect as gift!', '60', 1, '2014-06-06 17:12:21', '2014-06-05 18:12:11'),
(13, 'Abercrombie Allen Brook Shirt', 'Cool red shirt!', '70', 1, '2014-06-06 17:12:59', '2014-06-05 18:12:49'),
(26, 'Another product', 'Awesome product!', '555', 2, '2014-11-22 19:07:34', '2014-11-21 20:07:34'),
(28, 'Wallet', 'You can absolutely use this one!', '799', 6, '2014-12-04 21:12:03', '2014-12-03 22:12:03'),
(31, 'Amanda Waller Shirt', 'New awesome shirt!', '333', 1, '2014-12-13 00:52:54', '2014-12-12 01:52:54'),
(42, 'Nike Shoes for Men', 'Nike Shoes', '12999', 3, '2015-12-12 06:47:08', '2015-12-12 05:47:08'),
(48, 'Bristol Shoes', 'Awesome shoes.', '999', 5, '2016-01-08 06:36:37', '2016-01-08 05:36:37'),
(60, 'Rolex Watch', 'Luxury watch.', '25000', 1, '2016-01-11 15:46:02', '2016-01-11 14:46:02');

3.5 Connect to database

The code below shows the database credentials and a method to get a database connection using PDO. If you're not yet familiar with PDO, please learn from our PHP OOP CRUD Tutorial first.

Create api folder. Open api folder. Create config folder. Open config folder. Create database.php file. Place the following code inside it.

<?php
class Database{

	// specify your own database credentials
	private $host = "localhost";
	private $db_name = "api_db";
	private $username = "root";
	private $password = "";
	public $conn;

	// get the database connection
	public function getConnection(){

		$this->conn = null;

		try{
			$this->conn = new PDO("mysql:host=" . $this->host . ";dbname=" . $this->db_name, $this->username, $this->password);
			$this->conn->exec("set names utf8");
		}catch(PDOException $exception){
			echo "Connection error: " . $exception->getMessage();
		}

		return $this->conn;
	}
}
?>

4.0 Read products

4.1 Product object

The code below shows a class named Product with several of its properties. It also shows a constructor method that will accept the database connection.

We will use this class to read data from the database. Open api folder. Create objects folder. Open objects folder. Create product.php file. Place the following code inside it.

<?php
class Product{

	// database connection and table name
	private $conn;
	private $table_name = "products";

	// object properties
	public $id;
	public $name;
	public $description;
	public $price;
	public $category_id;
	public $category_name;
	public $created;

	// constructor with $db as database connection
	public function __construct($db){
		$this->conn = $db;
	}
}

4.2 Create file to read products

The code below shows headers about who can read this file and which type of content it will return.

In this case, our read.php file can be read by anyone (asterisk * means all) and will return a data in JSON format.

Open api folder. Create product folder. Open product folder. Create read.php file. Place the following code inside it.

<?php
// required headers
header("Access-Control-Allow-Origin: *");
header("Content-Type: application/json; charset=UTF-8");

// database connection will be here

4.3 Connect to database and products table

In the code below, we included the database.php and product.php files. These are the files we created earlier.

We need to use the getConnection() method of the Database class to get a database connection. We pass this connection to the Product class.

Replace of // database connection will be here comment of read.php file with the following code.

// include database and object files
include_once '../config/database.php';
include_once '../objects/product.php';

// instantiate database and product object
$database = new Database();
$db = $database->getConnection();

// initialize object
$product = new Product($db);

// read products will be here

4.4 Read products from the database

In the code below, we used the read() method of Product class to read data from the database. Through the $num variable, we check if there are records found.

If there are records found, we loop through it using the while loop, add each record to the $products_arr array, set a 200 OK response code and show it to the user in JSON format.

Replace of // read products will be here comment of read.php file with the following code.

// query products
$stmt = $product->read();
$num = $stmt->rowCount();

// check if more than 0 record found
if($num>0){

	// products array
	$products_arr=array();
	$products_arr["records"]=array();

	// retrieve our table contents
	// fetch() is faster than fetchAll()
	// http://stackoverflow.com/questions/2770630/pdofetchall-vs-pdofetch-in-a-loop
	while ($row = $stmt->fetch(PDO::FETCH_ASSOC)){
		// extract row
		// this will make $row['name'] to
		// just $name only
		extract($row);

		$product_item=array(
			"id" => $id,
			"name" => $name,
			"description" => html_entity_decode($description),
			"price" => $price,
			"category_id" => $category_id,
			"category_name" => $category_name
		);

		array_push($products_arr["records"], $product_item);
	}

	// set response code - 200 OK
	http_response_code(200);

	// show products data in json format
	echo json_encode($products_arr);
}

// no products found will be here

4.5 Add product "read()" method

We used the read() method on the previous section but it does not exist yet in the Product class. We need to add this read() method. The code below shows the query to get records from the database.

Open objects folder. Open product.php file. Place the following code inside the Product class. To make sure you added it correctly, put the code before the last closing curly brace.

// read products
function read(){

	// select all query
	$query = "SELECT
				c.name as category_name, p.id, p.name, p.description, p.price, p.category_id, p.created
			FROM
				" . $this->table_name . " p
				LEFT JOIN
					categories c
						ON p.category_id = c.id
			ORDER BY
				p.created DESC";

	// prepare query statement
	$stmt = $this->conn->prepare($query);

	// execute query
	$stmt->execute();

	return $stmt;
}

4.6 Tell the user no products found

If the $num variable has a value of zero or negative, it means there are no records returned from the database. We need to tell the user about this.

On the code below, we set the response code to 404 - Not found and a message that says No products found.

Replace of // no products found will be here comment of read.php file with the following code.

else{

	// set response code - 404 Not found
	http_response_code(404);

	// tell the user no products found
	echo json_encode(
		array("message" => "No products found.")
	);
}

4.7 Output

You need to use POSTMAN to test our API. Download your version of POSTMAN here.

Launch POSTMAN. Enter the following as the request URL.

http://localhost/api/product/read.php

Click the blue "Send" button.

Output if there are product data.

Output if there are no product data.

5.0 Create Product

5.1 Create create.php file

Open product folder. Create a new create.php file. Open that file and put the following code inside it.

<?php
// required headers
header("Access-Control-Allow-Origin: *");
header("Content-Type: application/json; charset=UTF-8");
header("Access-Control-Allow-Methods: POST");
header("Access-Control-Max-Age: 3600");
header("Access-Control-Allow-Headers: Content-Type, Access-Control-Allow-Headers, Authorization, X-Requested-With");

// get database connection
include_once '../config/database.php';

// instantiate product object
include_once '../objects/product.php';

$database = new Database();
$db = $database->getConnection();

$product = new Product($db);

// get posted data
$data = json_decode(file_get_contents("php://input"));

// make sure data is not empty
if(
	!empty($data->name) &&
	!empty($data->price) &&
	!empty($data->description) &&
	!empty($data->category_id)
){

	// set product property values
	$product->name = $data->name;
	$product->price = $data->price;
	$product->description = $data->description;
	$product->category_id = $data->category_id;
	$product->created = date('Y-m-d H:i:s');

	// create the product
	if($product->create()){

		// set response code - 201 created
		http_response_code(201);

		// tell the user
		echo json_encode(array("message" => "Product was created."));
	}

	// if unable to create the product, tell the user
	else{

		// set response code - 503 service unavailable
	    http_response_code(503);

		// tell the user
		echo json_encode(array("message" => "Unable to create product."));
	}
}

// tell the user data is incomplete
else{

	// set response code - 400 bad request
	http_response_code(400);

	// tell the user
	echo json_encode(array("message" => "Unable to create product. Data is incomplete."));
}
?>

5.2 Product create() method

Open objects folder. Open product.php file. The previous section will not work without the following code inside the Product (objects/product.php) class.

// create product
function create(){

	// query to insert record
	$query = "INSERT INTO
				" . $this->table_name . "
			SET
				name=:name, price=:price, description=:description, category_id=:category_id, created=:created";

	// prepare query
	$stmt = $this->conn->prepare($query);

	// sanitize
	$this->name=htmlspecialchars(strip_tags($this->name));
	$this->price=htmlspecialchars(strip_tags($this->price));
	$this->description=htmlspecialchars(strip_tags($this->description));
	$this->category_id=htmlspecialchars(strip_tags($this->category_id));
	$this->created=htmlspecialchars(strip_tags($this->created));

	// bind values
	$stmt->bindParam(":name", $this->name);
	$stmt->bindParam(":price", $this->price);
	$stmt->bindParam(":description", $this->description);
	$stmt->bindParam(":category_id", $this->category_id);
	$stmt->bindParam(":created", $this->created);

	// execute query
	if($stmt->execute()){
		return true;
	}

	return false;
	
}

5.3 Output

To test for successful creation of a product, open POSTMAN. Enter the following as the request URL

http://localhost/api/product/create.php

Click "Body" tab. Click "raw". Enter this JSON value:

{
    "name" : "Amazing Pillow 2.0",
    "price" : "199",
    "description" : "The best pillow for amazing programmers.",
    "category_id" : 2,
    "created" : "2018-06-01 00:35:07"
}

It should look like this:

If the system is unable to create the product, it should look like this:

If the sent data is incomplete, for example, it is missing the price data, output should look like this:

6.0 Read One Product

6.1 Create read_one.php file

Open product folder. Create new read_one.php file. Open that file and put the following code.

<?php
// required headers
header("Access-Control-Allow-Origin: *");
header("Access-Control-Allow-Headers: access");
header("Access-Control-Allow-Methods: GET");
header("Access-Control-Allow-Credentials: true");
header('Content-Type: application/json');

// include database and object files
include_once '../config/database.php';
include_once '../objects/product.php';

// get database connection
$database = new Database();
$db = $database->getConnection();

// prepare product object
$product = new Product($db);

// set ID property of record to read
$product->id = isset($_GET['id']) ? $_GET['id'] : die();

// read the details of product to be edited
$product->readOne();

if($product->name!=null){
	// create array
	$product_arr = array(
		"id" =>  $product->id,
		"name" => $product->name,
		"description" => $product->description,
		"price" => $product->price,
		"category_id" => $product->category_id,
		"category_name" => $product->category_name

	);

	// set response code - 200 OK
	http_response_code(200);

	// make it json format
	echo json_encode($product_arr);
}

else{
	// set response code - 404 Not found
    http_response_code(404);

	// tell the user product does not exist
	echo json_encode(array("message" => "Product does not exist."));
}
?>

6.2 Product readOne() method

Open objects folder. Open product.php file. The previous section will not work without the following code inside the Product class.

// used when filling up the update product form
function readOne(){

	// query to read single record
	$query = "SELECT
				c.name as category_name, p.id, p.name, p.description, p.price, p.category_id, p.created
			FROM
				" . $this->table_name . " p
				LEFT JOIN
					categories c
						ON p.category_id = c.id
			WHERE
				p.id = ?
			LIMIT
				0,1";

	// prepare query statement
	$stmt = $this->conn->prepare( $query );

	// bind id of product to be updated
	$stmt->bindParam(1, $this->id);

	// execute query
	$stmt->execute();

	// get retrieved row
	$row = $stmt->fetch(PDO::FETCH_ASSOC);

	// set values to object properties
	$this->name = $row['name'];
	$this->price = $row['price'];
	$this->description = $row['description'];
	$this->category_id = $row['category_id'];
	$this->category_name = $row['category_name'];
}

6.3 Output

First, we will test for a product that exists. Open POSTMAN. Enter the following as the request URL. Click the blue "Send" button.

http://localhost/api/product/read_one.php?id=60

Next, we will test for a product that does not exist. Enter the following as the request URL. Click the blue "Send" button.

http://localhost/api/product/read_one.php?id=999

7.0 Update product

7.1 Create "update.php" file

Open product folder. Create new update.php file. Open that file and put the following code inside it.

<?php
// required headers
header("Access-Control-Allow-Origin: *");
header("Content-Type: application/json; charset=UTF-8");
header("Access-Control-Allow-Methods: POST");
header("Access-Control-Max-Age: 3600");
header("Access-Control-Allow-Headers: Content-Type, Access-Control-Allow-Headers, Authorization, X-Requested-With");

// include database and object files
include_once '../config/database.php';
include_once '../objects/product.php';

// get database connection
$database = new Database();
$db = $database->getConnection();

// prepare product object
$product = new Product($db);

// get id of product to be edited
$data = json_decode(file_get_contents("php://input"));

// set ID property of product to be edited
$product->id = $data->id;

// set product property values
$product->name = $data->name;
$product->price = $data->price;
$product->description = $data->description;
$product->category_id = $data->category_id;

// update the product
if($product->update()){

	// set response code - 200 ok
	http_response_code(200);

	// tell the user
	echo json_encode(array("message" => "Product was updated."));
}

// if unable to update the product, tell the user
else{

	// set response code - 503 service unavailable
	http_response_code(503);

	// tell the user
	echo json_encode(array("message" => "Unable to update product."));
}
?>

7.2 Product update() method

Open objects folder. Open product.php file. The previous section will not work without the following code inside the Product class.

// update the product
function update(){

	// update query
	$query = "UPDATE
				" . $this->table_name . "
			SET
				name = :name,
				price = :price,
				description = :description,
				category_id = :category_id
			WHERE
				id = :id";

	// prepare query statement
	$stmt = $this->conn->prepare($query);

	// sanitize
	$this->name=htmlspecialchars(strip_tags($this->name));
	$this->price=htmlspecialchars(strip_tags($this->price));
	$this->description=htmlspecialchars(strip_tags($this->description));
	$this->category_id=htmlspecialchars(strip_tags($this->category_id));
	$this->id=htmlspecialchars(strip_tags($this->id));

	// bind new values
	$stmt->bindParam(':name', $this->name);
	$stmt->bindParam(':price', $this->price);
	$stmt->bindParam(':description', $this->description);
	$stmt->bindParam(':category_id', $this->category_id);
	$stmt->bindParam(':id', $this->id);

	// execute the query
	if($stmt->execute()){
		return true;
	}

	return false;
}

7.3 Output

Open POSTMAN. Enter the following as the request URL.

http://localhost/api/product/update.php

Click "Body" tab. Click "raw". Enter the following JSON value (make sure the ID exists in your database) and click the blue "Send" button.

{
    "id" : "106",
    "name" : "Amazing Pillow 3.0",
    "price" : "255",
    "description" : "The best pillow for amazing programmers.",
    "category_id" : 2,
    "created" : "2018-08-01 00:35:07"
}

The product ID 106, is just an example. You need to specify a product ID that exists in your database.

If you specify an ID that does not exist in the database, it might still say "product was updated. It does not update anything on the database but the query was executed successfully without any syntax errors.

To prevent this, you need an extra validation where you check if an ID exists in the database. This feature is not yet part of our tutorial.

If updating a product is successful, it should look like this:

If the system fails to update the product, output will look like this:

8.0 Delete Product

8.1 Create "delete.php" file

Open product folder. Create new delete.php file. Open that file and put the following code inside it.

<?php
// required headers
header("Access-Control-Allow-Origin: *");
header("Content-Type: application/json; charset=UTF-8");
header("Access-Control-Allow-Methods: POST");
header("Access-Control-Max-Age: 3600");
header("Access-Control-Allow-Headers: Content-Type, Access-Control-Allow-Headers, Authorization, X-Requested-With");

// include database and object file
include_once '../config/database.php';
include_once '../objects/product.php';

// get database connection
$database = new Database();
$db = $database->getConnection();

// prepare product object
$product = new Product($db);

// get product id
$data = json_decode(file_get_contents("php://input"));

// set product id to be deleted
$product->id = $data->id;

// delete the product
if($product->delete()){

	// set response code - 200 ok
	http_response_code(200);

	// tell the user
	echo json_encode(array("message" => "Product was deleted."));
}

// if unable to delete the product
else{

	// set response code - 503 service unavailable
	http_response_code(503);

	// tell the user
	echo json_encode(array("message" => "Unable to delete product."));
}
?>

8.2 Product delete() method

Open objects folder. Open product.php file. The previous section will not work without the following code inside the Product class.

// delete the product
function delete(){

	// delete query
	$query = "DELETE FROM " . $this->table_name . " WHERE id = ?";

	// prepare query
	$stmt = $this->conn->prepare($query);

	// sanitize
	$this->id=htmlspecialchars(strip_tags($this->id));

	// bind id of record to delete
	$stmt->bindParam(1, $this->id);

	// execute query
	if($stmt->execute()){
		return true;
	}

	return false;
	
}

8.3 Output

Open POSTMAN. Enter the following as the request URL.

http://localhost/api/product/delete.php

Click "Body" tab. Click "raw". Enter the following JSON value (make sure the ID exists in your database) and click the blue "Send" button.

{
    "id" : "106"
}

If a product was successfully deleted, it should look like this:

If the system fails to delete the product, output will look like this:

9.0 Search Products

9.1 Create "search.php" file

Open product folder. Create search.php file. Open that file and place the following code.

<?php
// required headers
header("Access-Control-Allow-Origin: *");
header("Content-Type: application/json; charset=UTF-8");

// include database and object files
include_once '../config/core.php';
include_once '../config/database.php';
include_once '../objects/product.php';

// instantiate database and product object
$database = new Database();
$db = $database->getConnection();

// initialize object
$product = new Product($db);

// get keywords
$keywords=isset($_GET["s"]) ? $_GET["s"] : "";

// query products
$stmt = $product->search($keywords);
$num = $stmt->rowCount();

// check if more than 0 record found
if($num>0){

	// products array
	$products_arr=array();
	$products_arr["records"]=array();

	// retrieve our table contents
	// fetch() is faster than fetchAll()
	// http://stackoverflow.com/questions/2770630/pdofetchall-vs-pdofetch-in-a-loop
	while ($row = $stmt->fetch(PDO::FETCH_ASSOC)){
		// extract row
		// this will make $row['name'] to
		// just $name only
		extract($row);

		$product_item=array(
			"id" => $id,
			"name" => $name,
			"description" => html_entity_decode($description),
			"price" => $price,
			"category_id" => $category_id,
			"category_name" => $category_name
		);

		array_push($products_arr["records"], $product_item);
	}

	// set response code - 200 OK
	http_response_code(200);

	// show products data
	echo json_encode($products_arr);
}

else{
	// set response code - 404 Not found
	http_response_code(404);

	// tell the user no products found
    echo json_encode(
		array("message" => "No products found.")
	);
}
?>

9.2 Create search() method

Open objects folder. Open product.php file. Add the following search() method.

// search products
function search($keywords){

	// select all query
	$query = "SELECT
				c.name as category_name, p.id, p.name, p.description, p.price, p.category_id, p.created
			FROM
				" . $this->table_name . " p
				LEFT JOIN
					categories c
						ON p.category_id = c.id
			WHERE
				p.name LIKE ? OR p.description LIKE ? OR c.name LIKE ?
			ORDER BY
				p.created DESC";

	// prepare query statement
	$stmt = $this->conn->prepare($query);

	// sanitize
	$keywords=htmlspecialchars(strip_tags($keywords));
	$keywords = "%{$keywords}%";

	// bind
	$stmt->bindParam(1, $keywords);
	$stmt->bindParam(2, $keywords);
	$stmt->bindParam(3, $keywords);

	// execute query
	$stmt->execute();

	return $stmt;
}

9.3 Output

Open POSTMAN. Enter the following as the request URL.

http://localhost/api/product/search.php?s=shirt

Click the blue "Send" button.

If there was a product found, it should look like this:

If there are no products found, output will look like this:

10.0 Paginate Products

10.1 Create "read_paging.php" file

Open product folder. Create read_paging.php file.

<?php
// required headers
header("Access-Control-Allow-Origin: *");
header("Content-Type: application/json; charset=UTF-8");

// include database and object files
include_once '../config/core.php';
include_once '../shared/utilities.php';
include_once '../config/database.php';
include_once '../objects/product.php';

// utilities
$utilities = new Utilities();

// instantiate database and product object
$database = new Database();
$db = $database->getConnection();

// initialize object
$product = new Product($db);

// query products
$stmt = $product->readPaging($from_record_num, $records_per_page);
$num = $stmt->rowCount();

// check if more than 0 record found
if($num>0){

	// products array
	$products_arr=array();
	$products_arr["records"]=array();
	$products_arr["paging"]=array();

	// retrieve our table contents
	// fetch() is faster than fetchAll()
	// http://stackoverflow.com/questions/2770630/pdofetchall-vs-pdofetch-in-a-loop
	while ($row = $stmt->fetch(PDO::FETCH_ASSOC)){
		// extract row
		// this will make $row['name'] to
		// just $name only
		extract($row);

		$product_item=array(
			"id" => $id,
			"name" => $name,
			"description" => html_entity_decode($description),
			"price" => $price,
			"category_id" => $category_id,
			"category_name" => $category_name
		);

		array_push($products_arr["records"], $product_item);
	}


	// include paging
	$total_rows=$product->count();
	$page_url="{$home_url}product/read_paging.php?";
	$paging=$utilities->getPaging($page, $total_rows, $records_per_page, $page_url);
	$products_arr["paging"]=$paging;

	// set response code - 200 OK
	http_response_code(200);

	// make it json format
	echo json_encode($products_arr);
}

else{

	// set response code - 404 Not found
	http_response_code(404);

	// tell the user products does not exist
	echo json_encode(
		array("message" => "No products found.")
	);
}
?>

10.2 Create "core.php" file

This file holds our core configuration like the home URL and pagination variables.

Open the config folder and create core.php file. Open core.php file and place the following code.

<?php
// show error reporting
ini_set('display_errors', 1);
error_reporting(E_ALL);

// home page url
$home_url="http://localhost/api/";

// page given in URL parameter, default page is one
$page = isset($_GET['page']) ? $_GET['page'] : 1;

// set number of records per page
$records_per_page = 5;

// calculate for the query LIMIT clause
$from_record_num = ($records_per_page * $page) - $records_per_page;
?>

10.3 Create "readPaging()" method

Open objects folder. Open product.php file. Add the following method inside product class. This method will return a list of records limited to what we set in $records_per_page of the previous section.

// read products with pagination
public function readPaging($from_record_num, $records_per_page){

	// select query
	$query = "SELECT
				c.name as category_name, p.id, p.name, p.description, p.price, p.category_id, p.created
			FROM
				" . $this->table_name . " p
				LEFT JOIN
					categories c
						ON p.category_id = c.id
			ORDER BY p.created DESC
			LIMIT ?, ?";

	// prepare query statement
	$stmt = $this->conn->prepare( $query );

	// bind variable values
	$stmt->bindParam(1, $from_record_num, PDO::PARAM_INT);
	$stmt->bindParam(2, $records_per_page, PDO::PARAM_INT);

	// execute query
	$stmt->execute();

	// return values from database
	return $stmt;
}

10.4 Create "count()" method

Still in the product class (product.php file), add the following method. The total rows are needed to build the pagination array. It is included in the 'paging' computation.

// used for paging products
public function count(){
	$query = "SELECT COUNT(*) as total_rows FROM " . $this->table_name . "";

	$stmt = $this->conn->prepare( $query );
	$stmt->execute();
	$row = $stmt->fetch(PDO::FETCH_ASSOC);

	return $row['total_rows'];
}

10.5 Get "paging" array

Create shared folder. Open shared folder.

Create utilities.php file. Open utilities.php file and place the following code.

<?php
class Utilities{

    public function getPaging($page, $total_rows, $records_per_page, $page_url){

        // paging array
        $paging_arr=array();

        // button for first page
        $paging_arr["first"] = $page>1 ? "{$page_url}page=1" : "";

        // count all products in the database to calculate total pages
        $total_pages = ceil($total_rows / $records_per_page);

        // range of links to show
        $range = 2;

        // display links to 'range of pages' around 'current page'
        $initial_num = $page - $range;
        $condition_limit_num = ($page + $range)  + 1;

        $paging_arr['pages']=array();
        $page_count=0;
        
        for($x=$initial_num; $x<$condition_limit_num; $x++){
            // be sure '$x is greater than 0' AND 'less than or equal to the $total_pages'
            if(($x > 0) && ($x <= $total_pages)){
                $paging_arr['pages'][$page_count]["page"]=$x;
                $paging_arr['pages'][$page_count]["url"]="{$page_url}page={$x}";
                $paging_arr['pages'][$page_count]["current_page"] = $x==$page ? "yes" : "no";

                $page_count++;
            }
        }

        // button for last page
        $paging_arr["last"] = $page<$total_pages ? "{$page_url}page={$total_pages}" : "";

        // json format
        return $paging_arr;
    }

}
?>

10.6 Output

Open POSTMAN. Enter the following as the request URL.

http://localhost/api/product/read_paging.php

Click the blue "Send" button.

If there are products found, scroll down to see the paging node. It should look like this:

If there are no products found, output will look like this:

11.0 Read Categories

11.1 Create "category.php" file

Open objects folder. Create new category.php file. Place the following code inside the category.php file.

<?php
class Category{

	// database connection and table name
	private $conn;
	private $table_name = "categories";

	// object properties
	public $id;
	public $name;
	public $description;
	public $created;

	public function __construct($db){
		$this->conn = $db;
	}

	// used by select drop-down list
	public function readAll(){
		//select all data
		$query = "SELECT
					id, name, description
				FROM
					" . $this->table_name . "
				ORDER BY
					name";

		$stmt = $this->conn->prepare( $query );
		$stmt->execute();

		return $stmt;
	}
}
?>

11.2 Create "read.php" file

Create new category folder. Open that folder and create new read.php file inside it. Open read.php file and place the following code.

<?php
// required header
header("Access-Control-Allow-Origin: *");
header("Content-Type: application/json; charset=UTF-8");

// include database and object files
include_once '../config/database.php';
include_once '../objects/category.php';

// instantiate database and category object
$database = new Database();
$db = $database->getConnection();

// initialize object
$category = new Category($db);

// query categorys
$stmt = $category->read();
$num = $stmt->rowCount();

// check if more than 0 record found
if($num>0){

	// products array
	$categories_arr=array();
	$categories_arr["records"]=array();

	// retrieve our table contents
	// fetch() is faster than fetchAll()
	// http://stackoverflow.com/questions/2770630/pdofetchall-vs-pdofetch-in-a-loop
	while ($row = $stmt->fetch(PDO::FETCH_ASSOC)){
		// extract row
		// this will make $row['name'] to
		// just $name only
		extract($row);

		$category_item=array(
			"id" => $id,
			"name" => $name,
			"description" => html_entity_decode($description)
		);

		array_push($categories_arr["records"], $category_item);
	}

	// set response code - 200 OK
    http_response_code(200);

	// show categories data in json format
	echo json_encode($categories_arr);
}

else{

	// set response code - 404 Not found
	http_response_code(404);

	// tell the user no categories found
    echo json_encode(
		array("message" => "No categories found.")
	);
}
?>

11.3 Add Category "read()" method

Open objects folder. Open category.php file. The previous section's code will not work without the following code inside the category.php file. Add the following method inside the Category class.

// used by select drop-down list
public function read(){

	//select all data
	$query = "SELECT
				id, name, description
			FROM
				" . $this->table_name . "
			ORDER BY
				name";

	$stmt = $this->conn->prepare( $query );
	$stmt->execute();

	return $stmt;
}

11.4 Output

Open POSTMAN. Enter the following as the request URL.

http://localhost/api/category/read.php

Click the blue "Send" button.

If there are categories found, it should look like this:

If there are no categories found, output will look like this:

12.0 Download Source Codes

We highly recommend for you to follow and study our well-detailed, step-by-step tutorial above first. Nothing beats experience when it comes to learning.

But we believe you will learn faster if you’ll see the final source code as well. We consider it as your additional guide.

Imagine the value or skill upgrade it can bring you. The additional income you can get from your work, projects or business. The precious time you save. Isn’t that what you want?

12.1 Download LEVEL 1 source code

FEATURES LEVEL 1
Create product YES
Read products YES
Read one product YES
Update product YES
Delete product YES
Search products YES
Paginate products YES
Read categories YES
FREE email support for 3 months YES
Source code updates via email YES
Download Now

THANK YOU!

has been added to your cart!

Powered by Easy Digital Downloads

Thank you!

have been added to your cart!

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12.2 Download LEVEL 2 source code

FEATURES LEVEL 2
All features of LEVEL 1 source code YES
Delete selected product YES
Export product CSV YES
Read products by category YES
Search products with pagination YES
Create category YES
Read categories YES
Read one category YES
Update category YES
Delete category YES
Search categories YES
Paginate categories YES
Delete selected categories YES
Export categories CSV YES
Search categories with pagination YES
FREE email support for 6 months YES
Source code updates via email YES
Download Now

THANK YOU!

has been added to your cart!

Powered by Easy Digital Downloads

Thank you!

have been added to your cart!

Powered by Easy Digital Downloads

13.0 What's Next?

You have two options:

a. Take your skills to the next level by learning how to do REST API authentication (with user interface) on our REST API Authentication Example in PHP – JWT Tutorial.

b. The tutorial above focuses on the API side, without any user interface. We will learn how to create, read, update and delete database records (with user interface) on our jQuery AJAX CRUD Tutorial.

If you want to receive new and updated high-quality tutorials, please subscribe for free.

14.0 Related Tutorials

15.0 Notes

#1 Found An Issue?

If you found a problem with this code, we can solve it faster via Email or FB message, please send me a message via email mike@codeofaninja.com, or via our official Facebook page!

Please be more detailed about your issue. Best if you can provide an error message and your test or page URL. Thanks!

Please feel free to comment if you have any questions, suggestions, found something wrong or want to contribute to this code.

#2 Become a true Ninja!

We constantly add new tutorials and improve our existing tutorials and source codes. Be one of the first to know an update by subscribing to our FREE newsletter. Get a FREE EBOOK as well. CLICK HERE TO SUBSCRIBE FOR FREE!

#3 Thank You!

Please note that this post is not yet in its final form. We are going to update this post so it will be perfect in the future.

If you have a friend or know someone who needs this PHP REST API Tutorial, please share this page to them! I know you will help them a lot by doing it. Thanks!

181 replies
  1. cebuanoninoy
    cebuanoninoy says:

    Hello Mike. Thank you for this wonderful Tutorial. But where could you find the core.php that you mentioned or ‘include’ in read.php? It’s not part of the code above under config folder.

  2. Ashish Maharjan
    Ashish Maharjan says:

    Hi, Mike. Thank you so much a very easy and well formatted tutorial. I think there’s a function “count()” missing in “Product” class which is calling from “read_paging.php” class. Could you please add that function? Thanks.

  3. Zuda Madhara
    Zuda Madhara says:

    Hi Mike, Great stuff. However, output for read_one.php populates only the id as shown below:
    {
    id: “2”,
    name: null,
    description: null,
    price: null,
    category_id: null,
    category_name: null
    }

    Could there be something wrong?

    ====Ignore me … it was due to bad data in my database!!===

  4. Nikhil Khandave
    Nikhil Khandave says:

    Hello Mike, great tutorial, learned so much from your tutorials, i hav just started PHP and angular js, i am getting error from this line

    $product->id = isset($_GET[‘id’]) ? $_GET[‘id’] : die(“no record found”);

    it displays “no record found”,
    could there be something wrong, becuase when i hard code the
    product->id = 1,
    it shows the result. and
    one more thing how $_GET[‘id’] works ?

    Thanks in advace

  5. Nonsono Statoio
    Nonsono Statoio says:

    Hi Mike, very interesting tut!
    My console give me a problem here:

    Parse error: syntax error, unexpected ‘public’ (T_PUBLIC) in C:xampphtdocsAngular-restconfigcore.php on line 19

    maybe is beacause the public function must be declared inside a class?

  6. Laurence Hudson Montgomery
    Laurence Hudson Montgomery says:

    Great tutorial, love the use of ‘output’ checks. I stumbled a bit at 6.3 because of hard to read details in the provided graphic not found in the text instructions:

    “If you develop on localhost and will run the read.php file using this URL: http://localhost/api/product/read_one.php
    You will see an output like this…”

    You might want to indicate in your text that an id value has to be passed :

    “If you develop on localhost and will run the read.php file using this URL: http://localhost/api/product/read_one.php?id=60
    You will see an output like this…”

    • Mike Dalisay
      Mike Dalisay says:

      Hi @laurencehudsonmontgomery:disqus , thanks for letting me know about the graphic being hard to read at your end.

      I just replaced it with a bigger image. We added more description as well. Let us know if it is more readable now.

  7. Anshul Mahipal
    Anshul Mahipal says:

    Great Tutorial Mike. But there is issue I just want to use that code with postman talking about create() it create the product but with empty field will you please tell me reason.

  8. Anshul Mahipal
    Anshul Mahipal says:

    Helle Mike, great tutorial
    But I stuck on single think that I want to post data using postman it create a record with empty field so please help me

  9. Nii Quartey
    Nii Quartey says:

    how do i access this api via url? I am new to using API’s and REST especially. Or how do i access it on other platforms. I need help please. It’s a very good tutorial and i liked the step by step process

  10. Robert
    Robert says:

    small fixes to avoid confusion in newbies like me :-)
    10.1 Create “read_paging.php” file, no indications on where to create it (we know, in the products folder, but is worth to indicate)
    10.2 states “create config folder”, but it has been already created for the database.php file
    10.3 Create “readPaging()” method, no indications on where to create it (we know, in the product.php file, but is worth to indicate)
    10.4 Create “count()” method, same as 10.3
    11.3 Add Category “read()” method – Open “objects” folder. Create new “category.php” file. But this file already exists

  11. Mike Dalisay
    Mike Dalisay says:

    Hi @Corsari:disqus , thanks for visiting our site!

    To answer your question, we used LEFT JOIN to pull the “category name”, without it, we can only pull the “category ID” from the products table and so we have to do another query for the “category name”.

    In other words, using the LEFT JOIN is more efficient because we don’t have to do multiple queries just to get the category name.

    By the way, I love your first comment here. Thanks you for the kind words! I wish you can republish it because I want to answer all your questions from there as well.

    • Robert
      Robert says:

      Hi Mike
      As you may have noticed, yesterday I was following your tutorials
      (REST API + following one, the “Pure AJAX CRUD”)

      So I have written some comments around the website

      Can you point me to the comment you mean?

      Thank you

  12. Mike Dalisay
    Mike Dalisay says:

    Hi @Corsari:disqus , your comment above is the one I’m talking about. I don’t know why but I found it in the spam section of Disqus, so I thought you deleted it.

    Anyway, I added section 1.1 to 1.4 on the post. Those are based on your suggestions. Thank you! I hope those explanation and supplementary videos will help you and the others.

  13. Robert
    Robert says:

    Hi Mike
    one kind “issue” with all of this related with the AJAX CRUD js php tutorial that uses this API

    All of this cannot be used in production right? :-)

    Since e.g. the API is without athentication and all of the js files are easy readable so tehy will unveil the API path and commands

    Do you think to add some security? Or this tutorial is intended for the sole purpose of teach methods? Anyway the security is part of the learn stage ;-)

    • Mike Dalisay
      Mike Dalisay says:

      Hi @Corsari:disqus , this tutorial is intended for the sole purpose of teaching methods. You are right about the security being part of the learn stage. But that’s another topic and deserves another post. We’ll try to release that kind of tutorial soon.

  14. Roberto
    Roberto says:

    Hi Mike.
    I had made the first level but when I run the read.php I get this: {“message”:”No products found.”}.
    I have the tables well done. I had made the change in the table name “products” to “productos” and I don’t receive any warning. Thanks in advance for your comments

    • Mike Dalisay
      Mike Dalisay says:

      Hi @guidoleijten:disqus, thanks for your comment! We don’t miss an ‘else’ on section 8.2, the code will work as is. If ‘$stmt->execute()’ is true, the method will return true. It won’t execute the ‘return false’ under it.

      • Guido Leijten
        Guido Leijten says:

        Fair enough! It just looked like it as all the other methods do have it set up with an if/else. I must say that this is an excellent tutorial, I am following a PHP course and this week we had to find out how to build our own API, I searched the net for information on it and I got a vague idea, but after following your tutorial it’s all so clear and it’s amazing how simple it can be! I’ve recommended it to everyone here and my teacher will link to it on his blog as well, because not only is it good for people who want to learn how to create a RESTful API, but it’s also excellent to get a better grasp on OOP as I hear from a lot of people here that they don’t really know when to use classes.

        One other thing, I am using the Chrome extension Advanced REST Client and when trying to PUT/POST I had to utf8_encode the input before json_decode, it appears that others in the comment section did not experience this issue. Easily fixable, but it made me wonder why my code didn’t work without it.

        Anyway, again – great tutorial! Definitely something I’ll keep recommending when I hear someone struggling trying to create their own API.

  15. Techbyte Solutions
    Techbyte Solutions says:

    header(“Access-Control-Allow-Origin: *”); is not suitable. It allows anyone to allow access to our resources.
    You must provide some access token or Oauth for secure connection. bdw Your tutorial is nice.

  16. Amin R
    Amin R says:

    Hi @@ninjazhai:disqus thanks alot for this applicable tutorial.
    I have a problem in receiving data In the product/create.php file, “php://input” is empty when I send http post request.
    I checked $data = json_decode(file_get_contents(“php://input”)) and also $_POST through these line of codes :
    var_dump($data);
    var_dump($_POST);

    both are empty!
    I tested other enctypes also … http request response is always 200OK but the controller php file (create.php) shows nothing data received.
    can you help me to debug this problem ?

    • Mike Dalisay
      Mike Dalisay says:

      Hi @masreshatsegayeakamati:disqus , you can use your JavaScript application to do a POST request and then your PHP code must accept a POST request as well. You can access the “id” or any parameter using this method.

  17. Adriano Giovannini
    Adriano Giovannini says:

    Hello,
    first and foremost great tutorial (and great job) but i have a little question:

    In your screen i see the json output formatted, and your browser is chrome. Do you get a formatting that way? I have run both on linux and windows with chrome and firefox but nothing output is always on a line like this.

    {“records”:[{“id”:”4″,”name”:”Books”,”description”:”Kindle books”},{“id”:”2″,”name”:”Electronics”,”description”:”Gadgets, drones and more.”},{“id”:”1″,”name”:”Fashion”,”description”:”Category for anything related to fashion.”},{“id”:”3″,”name”:”Motor”,”description”:”Motor sports and more”},{“id”:”5″,”name”:”Movies”,”description”:”Movie products”},{“id”:”6″,”name”:”Sports”,”description”:”Drop into new winter gear.”}]}

  18. Mike Dalisay
    Mike Dalisay says:

    Hi @disqus_jd9M9R6P27:disqus, thanks for the kind words about our tutorial! I’m sorry I’m not familiar with sqlsrv. You can check if the $num variable value is correct or greater than 0. Make sure you sample data is sufficient as well.

  19. HCB
    HCB says:

    First, I’m very excited about starting this, because it looks comprehensive enough without getting too far “into the weeds” for someone who needs to work a day job (stuck in a legacy env.) and learn new technologies. Question about the file structure though: Are all the directories to be placed off the docroot, or are the subsequent directories off the ‘api’ directory? Like this:
    ├─ api/
    ├─── config/
    ├────── core.php – file used for core configuration
    ├────── database.php – file used for connecting to the database.
    ├─── objects/
    ├────── product.php – contains properties and methods for “product” database queries.
    ├────── category.php – contains properties and methods for “category” database
    queries.
    ├─── product/
    ├────── create.php – file that will accept posted product data to be saved to database.
    ├────── delete.php – file that will accept a product ID to delete a database record.
    ├────── read.php – file that will output JSON data based from “products” database
    records.
    ├────── read_paging.php – file that will output “products” JSON data with pagination.
    ├────── read_one.php – file that will accept product ID to read a record from the
    database.
    ├────── update.php – file that will accept a product ID to update a database record.
    ├────── search.php – file that will accept keywords parameter to search “products”
    database.
    ├─── category/
    ├────── read.php – file that will output JSON data based from “categories” database
    records.
    ├─── shared/
    ├────── utilities.php – file that will return pagination array.

    • Mike Dalisay
      Mike Dalisay says:

      Hi @Rookie Dev, thanks for visiting our site and sharing your thoughts! The closing PHP tag is not a “bad practice”. The link you sent says it is something that is “preferable” if a file is a pure PHP code.

      I’ve been coding PHP for many years and the closing PHP tag was never a problem. It is just a personal preference. If you think an accidental whitespace is a big deal for you app, then I suggest you don’t use the closing PHP tag.

  20. Gary Harris
    Gary Harris says:

    This is a great guide for developing a REST API! Would it be possible for you guys to put together a simple guide on how to secure the API with OAuth? Or, could you point me to a resource that describes securing an API with OAuth from beginning to end? Thanks!

  21. So Fabulous
    So Fabulous says:

    Me and my classmate are making this api on different laptops. His and mine weren’t able to communicate for some reason. While testing the create method, the only thing that’s being inputted in my database are brackets. Like so https://uploads.disquscdn.com/images/79d4ca780abe3a158ef684be084c6951ca57be16d2a0779e5b437495d62476c3.png
    I did mess with the code a lot, since I was using it for something else, but I wonder if you know why this occurs?

    • Mike Dalisay
      Mike Dalisay says:

      Hi @disqus_7hJqGh3eKk:disqus, thank you for using our tutorial! Unfortunately, there’s no way for me to debug your customizations. I highly recommend following the exact tutorial above first. After that, you can do your own customizations on the code. It will be easier since you understand the basics.

  22. Lorna Macdonald
    Lorna Macdonald says:

    Hi. I’m using this tutorial to help me build my own REST api. But within the search part of my api, I need to be able to search by two parameters. Is this an easy fix in this code? I’m really struggling to figure out how to implement it.

    • Mike Dalisay
      Mike Dalisay says:

      Hi @disqus_fpCGRZwrkb:disqus, if you need a feature where you can pass two parameters, you can format the search like this:


      search.php?s=searchkey&s2=searchkey2

      and get the value of s2 like this


      $keywords2=isset($_GET["s2"]) ? $_GET["s2"] : "";

  23. Mike Dalisay
    Mike Dalisay says:

    Hi @tobiasparent:disqus, thanks for the kind words and sorry for the late reply, it’s been a crazy couple of monhts for me. Anyway, yes, this is only a good starting point and the article covers only the basic concepts.

    Let me know if I understood your concern correctly. Do you mean you need the code to run with different type of data sources and not rely with PDO? You have a point, we can do that with PHP because it can connect even to an Oracle database.

    Unfortunately, I am not familiar with that situation and my knowledge is currently limited to using PDO. It works with all my projects and my clients are happy with it.

    It sounds like you’re a very knowledgable person and I’d love to learn more from you! Can you point us to better references or resources so that we can improve our tutorial above?

  24. Vivek Gupta
    Vivek Gupta says:

    not able to get output of search() function
    i m getting this
    Fatal error: Uncaught Error: Call to undefined method Product::search() in E:xampphtdocsrootfolderapiproductsearch.php:21
    line no. 21// query products
    $stmt = $product->search($keywords);
    $num = $stmt->rowCount();
    plz help

  25. keith
    keith says:

    This doesn’t work for a react fetch call – I’ve followed the code exactly, I’m receiving a Json response back when I visit in a browser but (I think) something is wrong with the header where the react code:

    fetch(‘fetch(‘http://localhost/api/product/read_one.php?id=60’)
    .then((response) => response.json())
    .then(json => this.setState({series:json}))

    won’t retrieve the data back

    why is that?
    thanks

    K

  26. Mike Dalisay
    Mike Dalisay says:

    Hi @dave_geez:disqus, first, I’m not forcing anyone to use MyISAM. A person like you who has a lot of time to update or comment on a tutorial can use whatever you want.

    I’m not forcing you to use it. In fact, I updated the tutorial with InnoDB as well.

    I don’t believe my question makes no sense. Some users have had to rely on MyISAM for its full text search capabilities, and in some cases, better performance in applications that didn’t require transactional capabilities.

  27. Mike Dalisay
    Mike Dalisay says:

    Thank you for the detailed reply @tobiasparent:disqus! We’ll definitely improve the tutorial above with your suggestions in mind. I’m looking forward to the link of your work. I’m glad your appreciate our resource even though it is not perfect. Thank you!

  28. Rani Somu
    Rani Somu says:

    Hi,
    This article is clearly explained each and every step. It is very useful. Thank you for this article.
    I need your guidance to achieve the following requirements.
    1. “SELECT * FROM” . $this->table_name . ” WHERE created between ? and ?;”
    2. “SELECT * FROM” . $this->table_name . ” WHERE created >=? and created<=?;"
    Can you please guide me.
    Thanks in advance.

  29. Mike Dalisay
    Mike Dalisay says:

    Hi @disqus_TR7OR7SoPY:disqus, if it works on localhost, I think there’s a problem with your database connection. Would you try to show an error message using this inside the “else” statement.

    print_r($this->conn->errorInfo());

  30. Mike Dalisay
    Mike Dalisay says:

    Hi @ranisomu:disqus, did your query worked on PhpMyAdmin? Based on your query, it should be:


    $start_date="2014-06-01";
    $end_date"2014-06-30";

    I’m not sure why this is not working on your end. Which PHP and MySQL version are you using? Are you debugging locally?

    Yes, the isset method is needed. The code on your searchdate.php is in comments, please remove the double slash.

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