simple-captcha
Simple class that implement a CAPTCHA for your PHP App.
Installation
Use the package manager composer to install.
composer require williamsampaio/simple-captcha
Documentation
1. Create new Captcha
$captcha = new SimpleCaptcha();
If no parameters are passed the captcha code will be automatically generated with a length of 5 numeric characters.
But it is possible to pass two parameters. The first is a string with the captcha code (maximum length of 16 characters), the second is a boolean to generate random colors if true.
$captcha = new SimpleCaptcha("H@ck3R'D_C0@r1", true);
2. Get the captcha code
$captcha->getKey();
3. Get the captcha image
<img src="<?php echo $captcha->getImg() ?>" />
Example
A simple usage example.
<?php
require __DIR__ . '/../vendor/autoload.php';
use WilliamSampaio\SimpleCaptcha\SimpleCaptcha;
session_start();
$captcha = new SimpleCaptcha();
if(isset($_POST['captcha'])){
if($_POST['captcha'] == $_SESSION['captcha']->getKey()){
echo "<h1 style='color:green;'>Captcha valid! (".$_POST['captcha'] ."=". $_SESSION['captcha']->getKey().")</h1>";
}else{
echo "<h1 style='color:red;'>Captcha invalid! (".$_POST['captcha'] ."=". $_SESSION['captcha']->getKey().")</h1>";
}
}
$_SESSION['captcha'] = $captcha;
?>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<form method="post">
<img src="<?= $captcha->getImg() ?>"/>
<br>
<input type="text" name="captcha" id="captcha">
<hr>
<input type="submit" value="Check">
</form>
</body>
</html>
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