Convert a DIV Area to an Editable HTML Form

Published by - @ninjazhai on July 22, 2012
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Hi guys! It’s been more than a month hahaha! How are you? So today we are going to do a code that converts a DIV area to an editable HTML form and save the changes to the database. We are going to use jQuery, PHP & MySQL ofcourse.

My inspiration for this post is Youtube!

Video Demo Permalink

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For beginners, this post covers some useful stuff like:

  • jQuery on(), post(), hover(), text(), val(), serialize(), css(), show() and hide() function examples
  • For PDO, we’ll cover how to use the SELECT and UPDATE commands for database interaction.
  • You will also learn or see an example on how to submit form without page refresh (AJAX).

Our database would look like this:

CREATE TABLE IF NOT EXISTS `users` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `firstname` varchar(32) NOT NULL,
  `lastname` varchar(32) NOT NULL,
  `gender` varchar(6) NOT NULL,
  `username` varchar(32) NOT NULL,
  `password` varchar(32) NOT NULL,
  `modified` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`)
) ENGINE=InnoDB  DEFAULT CHARSET=latin1 AUTO_INCREMENT=56 ;
–
– Dumping data for table `users`
–

INSERT INTO `users` (`id`, `firstname`, `lastname`, `gender`, `username`, `password`, `modified`) VALUES
(28, ‘John’, ‘Dalisay’, ‘Male’, ‘john’, ‘john123′, ’2012-07-23 13:26:39′);

The Code

our libs/db_connect.php code, change as you needed.

<?php
$host = “localhost”;
$db_name = “codeofaninja”;
$username = “root”;
$password = “”;
try {
    $con = new PDO(“mysql:host={$host};dbname={$db_name}“, $username, $password);
}catch(PDOException $exception){ //to handle connection error
    echo “Connection error: “ . $exception->getMessage();
}
?>

our index.php code:

<html>
    <head>
        <title>Div to Form – http://codeofaninja.com/</title>
        <!–just to include some styles –>
        <link rel=”stylesheet” type=”text/css” href=”css/style.css” />
    </head>
<body>
<div id=’banner’>
    <h2>Code of a Ninja Programming Blog</h2>
    <div>Converting a div to an editable HTML form and save changes to database</div>
</div>

<?php
//just getting the id of the user to be edited
$id = $_REQUEST['id'];

//connect to database
include ‘libs/db_connect.php’;

try {

    //prepare query
    $query = “select id, firstname, lastname, gender from users where id = ? limit 0,1″;
    $stmt = $con->prepare( $query );
    
    //this is the first question mark on the query above
    $stmt->bindParam(1, $id);
    
    //execute our query
    $stmt->execute();
    
    //store retrieved row to $row variable
    $row = $stmt->fetch(PDO::FETCH_ASSOC);
    
    //values to fill up our form
    $firstname = $row['firstname'];
    $lastname = $row['lastname'];
    $gender = $row['gender'];
    
}catch(PDOException $exception){ //to handle error
    echo “Error: “ . $exception->getMessage();
}

?>
<!–start of our form –>
<form id=’user_form’>

<!–id field is hidden, this is used to identify what row is to be edited–>
<input type=’hidden’ value=’<?php echo $id; ?>‘ name=’id’/>

<!–
    -just a form made with divs
    -when this div was clicked, it will be a form
–>
<div id=’form_div’>
    
    <div class=’field’>
        <div class=’field_lbl’>Firstname:</div> <!–field name divs –>
        <div class=’field_val’>
            <div class=’field_div’>
                <!–
                    -this shown on page load
                    -and is hidden when the form_div was clicked
                    -and will be shown again when the user clicked anywhere outside the form_div or cancel button
                –>
                <div id=’firstname_text’><?php echo $firstname; ?></div>
            </div>
            <div class=’field_input’>
                <!–
                    -this is hidden on page load
                    -and is shown when form_div was clicked
                    -and will be hidden again when the user clicked anywhere outside the form_div or cancel button
                –>
                <input type=’text’ value=’<?php echo $firstname; ?>‘ name=’firstname’ id=’firstname’/>
            </div>
            <div class=’clear_fix’></div>
        </div>
        <div class=’clear_fix’></div>
    </div>
    <div class=’clear_fix’></div>
    
    <!–same explanation above are given to these next fields–>
    <div class=’field’>
        <div class=’field_lbl’>Lastname:</div>
        <div class=’field_val’>
            <div class=’field_div’>
                <div id=’lastname_text’><?php echo $lastname; ?></div>
            </div>
            <div class=’field_input’><input type=’text’ value=’<?php echo $lastname; ?>‘ name=’lastname’ id=’lastname’ /></div>
            <div class=’clear_fix’></div>
        </div>
        <div class=’clear_fix’></div>
    </div>
    <div class=’clear_fix’></div>
    
    <div class=’field’>
        <div class=’field_lbl’>Gender:</div>
        <div class=’field_val’>
            <div class=’field_div’>
                <div id=’gender_text’><?php echo $gender; ?></div>
            </div>
            <div class=’field_input’>
                <select name=’gender’ id=’gender’>
                    <option <?php if($gender == “Male”) echo “selected”;  ?> >Male</option>
                    <option <?php if($gender == “Female”) echo “selected”;  ?>>Female</option>
                </select>
            </div>
            <div class=’clear_fix’></div>
        </div>
        <div class=’clear_fix’></div>
    </div>
    <div class=’clear_fix’></div>
    
    <!–
    -these buttons are hidden on page load
    -they are shown when form_div was clicked
    -and will be hidden again when the user clicked anywhere outside the form_div or cancel button
    —>
    <div class=’btns’>
        <input type=’button’ value=’Save’ id=’save_btn’ />
        <input type=’button’ value=’Cancel’ id=’cancel_btn’ />
    </div>
    
</div>

</form>

<script src=”js/jquery.min.js “></script>
<script type=’text/javascript’>
$( document ).ready( function(){

    enable_hover(); //hover effect is enabled on page load

    $(‘#form_div’).click(function(){
        edit_mode();
    });
    
    //when clicked the cancel button
    $(‘body’).on(‘click’, ‘#cancel_btn’, function(){
        normal_mode(); //back to normal mode
    });
    
    //we used the jquery delegate func for live events
    $(‘body’).on(‘click’, ‘#save_btn’, function(){
        
        //save first here
        //get the current values
        var fn = $(‘#firstname’).val();
        var ln = $(‘#lastname’).val();
        var gender = $(‘#gender’).val();
        
        //the make it appear in the UI
        $(‘#firstname_text’).text(fn);
        $(‘#lastname_text’).text(ln);
        $(‘#gender_text’).text(gender);
        
        //save the actual data
        //we use jquery serialize to serialize the form and easily get the form values
        //this is how to submit or post form without page refresh
        $.post(“save.php”, 
            $(“#user_form”).serialize(),
            function(data) {
                //you can do any event you want here
                alert(data); //alert that the date were saved
                normal_mode(); //back to normal mode
            });
            
    });
    
    //this way we can detect if the user clicked outside the form_div area
    $(“body”).click(function(e) {
        if (e.target.id == “form_div” || $(e.target).parents(“#form_div”).size()) { 
            //if clicked inside form_div area,
            //do nothing
        } else {
            //if the user clicked outside the form_div area, 
            //we’ll be in normal mode
            normal_mode();
        }
    });
   

    
});

function edit_mode(){

    $(‘#form_div’).css({ ‘background-color’ : ‘#fff’ }); //just make a white background
    $(‘#form_div’).unbind(‘hover’); //disable hover
    
    $(‘.field_div’).hide(); //hide the text
    $(‘.field_input’).show(); //show the form element
    $(‘.btns’).show(); //show the buttons

}

//the normal state is the appearance of the page/element when it was first loaded
function normal_mode(){
    enable_hover(); //enable the hover effect again
    $(‘.field_div’).show(); //show the texts
    $(‘.field_input’).hide(); //hide the input elements
    $(‘.btns’).hide(); //hide the buttons
}

//hover effect is used when NOT in ‘edit form’ mode
//we unbind this effect when we are in the ‘edit form’ mode
function enable_hover(){
    $(‘#form_div’).hover(
        function(){ //when we hover form_div, bg will be gray with a bit of rounded corners
            $(this).css({
                    ‘background-color’ : ‘#dcdcdc’,
                    ‘-moz-border-radius’ : ’5px’,
                    ‘border-radius’ : ’5px’
                    });
        },
        function(){ //when mouse is not hovered, bg will be transparent
            $(this).css({‘background-color’ : ‘transparent’});
        }
    );
}
</script>

</body>
</html>

our save.php code:

<?php
//this is where the data were updated/saved
//connect to database
include ‘libs/db_connect.php’;

try{
    
    //write query
    //in this case, it seemed like we have so many fields to pass and 
    //its kinda better if we’ll label them and not use question marks
    //like what we used here
    $query = “update 
                users 
            set 
                firstname = :firstname, 
                lastname = :lastname,
                gender = :gender
            where id = :id”;

    //prepare query for excecution
    $stmt = $con->prepare($query);

    //bind the parameters
    $stmt->bindParam(‘:firstname’, $_POST['firstname']);
    $stmt->bindParam(‘:lastname’, $_POST['lastname']);
    $stmt->bindParam(‘:gender’, $_POST['gender']);
    $stmt->bindParam(‘:id’, $_POST['id']);
    
    // Execute the query
    if( $stmt->execute() ){
        echo “Record was updated.”;
    
    }else{
        echo “Unable to update record.”;
    }

}catch(PDOException $exception){ //to handle error
    echo “Error: “ . $exception->getMessage();
}
?>

our style.css file:

body{
    margin:0;
    font-family:arial, verdana, tahoma;
}
#banner{
    margin:0 0 50px 0;
    padding:20px;
    width:100%;
    height:100px;
}

#form_div{
    padding:10px;
    width:500px;
    margin:0 auto;
}

.field{
    padding: 10px;
}

.field_lbl{
    float:left;
    margin:0 10px 0 0;
    width:80px;
    font-weight:bold;
}

.field_val{
    float:left;
}

.field_div{
    display:block;
}

.field_input{
    display:none;
}

.btns{
    display:none;
    margin:0 0 0 8px;
}

.clear_fix{
    clear:both;
}

That’s it!
PS: Thank you guys for your kind comments, messages and suggestions. I really appreciate it! Sorry for those job opportunities I denied, I am currently employed and really busy. I hope I can still contact you if I need a job! Hehe. Thanks for your kind consideration!

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