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File: display_random.php

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  Classes of Bogdan Lupandin  >  CAPTCHA with Audio  >  display_random.php  >  Download  
File: display_random.php
Role: Auxiliary script
Content type: text/plain
Description: Random captcha example
Class: CAPTCHA with Audio
Authenticate human users with audio CAPTCHA
Author: By
Last change:
Date: 2 years ago
Size: 2,358 bytes
 

 

Contents

Class file image Download
<?php
session_start
();

$captcha = array('math', 'string');

// Captcha instructions (if any) Later would be displayed accordingly to the captcha displayed
$captcha_inst = array('math' => '',
                     
'string' => 'Do not include spaces. All lower case.');

// The type of captcha we are doing (the key to the $captcha array
$type = rand(0, (count($captcha) - 1));

// The file path of the random captcha
$file_path = "./captcha/{$captcha[$type]}.php";
?>

<body>
    <head>
        <title>String Captcha</title>
        <style type="text/css">
            .captchaLink
            {
                width: 16px;
                height: 16px;
                border: none;
                cursor: pointer;
            }
           
            .captchaLink:hover
            {
                color: #ff0000;
            }
           
            .inline
            {
                float: left;
            }
        </style>
    </head>
    <body>
        <div class="inline">
            <img src="<?=$file_path;?>" alt="captcha" />
        </div>
        <div class="inline">
            <a onclick="document.getElementById('demo').play()" class="captchaLink" >&#9655;</a><br />
            <a onclick="document.getElementById('demo').pause()" class="captchaLink" >&#9015;&#9015;</a>
        </div>
        <div style="clear: both;"></div>
        <audio id="demo">
            <source src="./audio/<?=$captcha[$type];?>_audio.php?aud=<?php echo time(); ?>" type="audio/mpeg" />
            Your browser does not support the audio element.
        </audio>
        <!-- Displaying the instructions to the captcha (if any) accordingly to the captcha displayed //-->
        <p><?=$captcha_inst[$captcha[$type]];?></p>
        <form action="display_random.php" method="POST">
            <input type="text" name="captcha" /><br />
            <input type="submit" name="submit" value="Submit" />
            <input type="reset" value="Reset" />
        </form>
    </body>
</html>
<?php
if(isset($_POST['submit']))
{
   
// Checking the session captcha vs the submitted captcha
   
if($_SESSION['captcha'] == $_POST['captcha'])
    {
// It was a match
       
echo 'Correct!';
    }
    else
    {
// It was NOT a match
       
echo 'Incorrect, correct answer was ' . $_SESSION['captcha'];
    }
}
?>