How to Create CAPTCHA image verification using PHP and jQuery
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How to Create CAPTCHA Protection using PHP and AJAX
Simple CAPTCHA meaning is a simple test to know or determine if a user is a computer robot’s or a human.This is simple source code and powerful plugin CAPTCHA script, using this simple script We are going to Make a random simple number and then some creates an image.
If the simple user Data submits the HTML form with All the image number correct captcha value, And then We can proceed with next simple PHP statements like all the inserting data into the MYSQL database or simple sending an email.
1. Create HTML Page with Basic HTML Markup
This is Basic SIMPLE HTML Markup with simple HTML form inside body PHP section with USER name, AND email & captcha fields also a click submit button. Save Data this file Like as index.php
<title>Simple CAPTCHA Script using PHP</title> <!-- Devloped by Pakainfo.com free download examples --> <form action="" method="post"> </form>
captcha.php (CAPTCHA Script in PHP)
session_start(); $live_captcha_num = rand(1000, 9999); $_SESSION['code'] = $live_captcha_num;
Above simple source code generates only Numeric four digits number, if We want to generate randomly captcha source code with numbers as well as also combined with some strings then use this below source code.
session_start(); $live_captcha_num = '1234567890ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'; $live_captcha_num = substr(str_shuffle($live_captcha_num), 0, 6); $_SESSION["code"] = $live_captcha_num;
We can use any above source code to simple PHP Based generate captcha as per your some requirement.
//sizes of captcha image As well as font size of captcha $live_font_size = 30; $live_img_width = 70; $live_img_width = 40; //content type of cpatcha.php file to image/jpeg header('Content-type: image/jpeg'); //make captcha image with defined sizes and set background color $image = imagecreate($live_img_width, $live_img_width); // Make background image with dimensions imagecolorallocate($image, 255, 255, 255); // set background color // set captcha text color $live_text_color = imagecolorallocate($image, 0, 0, 0); // image from generated captcha string imagettftext($image, $live_font_size, 0, 15, 30, $live_text_color, 'font.ttf', $live_captcha_num); imagejpeg($image);
3. Display captcha code in HTML Form
<title>Live - Simple CAPTCHA Script in PHP</title> <!-- Devloped by Pakainfo.com free download examples --> <form action="" method="post"> <img src="captcha.php" /> </form> <p>Live24u is the most popular Programming & Web Development blog. Our mission is to provide the best online resources on programming and web development. We deliver the useful and best tutorials for web professionals — developers, programmers, freelancers and site owners. Any visitors of this site are free to browse our tutorials, live demos and download scripts.</p>
4. PHP Check the captcha source code after form submission
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