PHP Contact Form Captcha Code Using Ajax - Mostlikers

13 January, 2015

PHP Contact Form Captcha Code Using Ajax

PHP contact form with captcha verification code. Why we use to Captcha in website, it will protects your website for spammers and robots. Here i have used ajax script to check validate captcha code. For creating images and text you have download libraries file.

Php contact form captcha code using Ajax


Download          Live Demo


Php captcha libraries file
 $captcha->CreateImage(); - create random image.
 $captcha = new SimpleCaptcha(); - create new captcha random number.

Note captcha.php file libraries file. 

Index.php

<html>
    <head>
        <title>Captcha test | mostlikers</title>
        <script src="//ajax.googleapis.com/ajax/libs/jquery/2.1.3/jquery.min.js"></script>          
        <script src="cap_ajax.js"></script>
    </head>
    <body>
        <form id="form_captcha" method="post">
            <img src="captcha.php" id="captcha" />
            <a href="#" id="captcha_text"><img id="refresh-captcha" src="refresh_1.png"></a>
            <br/>
            <input required type="text" name="captch" id="captch" />
            <div class="error captcha_error"></div>
            <br/>
            <input name="submit" value="submit" class="cap_submit" type="button" />
        </form>
    </body>
</html>

cap_ajax.js

$(document).ready(function(){
    $(document).on("click", '#captcha_text', function(event) { 
        document.getElementById('captcha').src='captcha.php?'+Math.random();
        document.getElementById('captcha-form').focus();
        return false;
    });
    $(document).on("click", '.cap_submit', function(event) { 
        var captch = $('#captch').val();
        var dataString = 'captch=' + captch;
        $.ajax({
            type: "POST",
            url: "captcha_verify.php",
            data: dataString,
            dataType : "html",
            success: function(data){                
                if(data=='0')
                {
                    $('.captcha_error').html('your entered code is incorrect.');                    
                }
                else if(data=='1')
                {
                    alert('your entered code is correct.');
                    location.reload();
                }
                else{
                    alert('Please Enter verfication text'); 
                }
            }
        });
        return false;
    });          
});


captcha_verify.php

<?php session_start();
if (!empty($_POST['captch'])) {
    if (empty($_SESSION['captcha']) || trim(strtolower($_POST['captch']))
       != $_SESSION['captcha'] || empty($_POST['captch'])) {
        echo '0';
        
    } else {
        echo '1';
        unset($_SESSION['captcha']);
    }   
}
?>


I hope this post helpful for you, Share your comments below.







No comments:

Post a comment