How to use captcha in php?

by 3 replies
3
How to use captcha in php?
#programming #captcha #php
  • This is very simple program captcha in php you should go to google and search captcha in php and you got hundred and more link and resolved your problem
  • <?php
    session_start();
    include("./phptextClass.php");

    /*create class object*/
    $phptextObj = new phptextClass();
    /*phptext function to genrate image with text*/
    $phptextObj->phpcaptcha('#162453','#fff',120,40,10,25);
    ?>
  • 1. Create file "capcha.php":

    <?php
    $seccode = mt_rand(10000, 99999);
    session_start();
    $_SESSION['seccode'] = $seccode;
    header("Content-Type: image/png");
    $im = imagecreate(60, 18) or die('Error on create image!');
    $corfundo = imagecolorallocate($im, 255, 244, 234);
    $corfonte = imagecolorallocate($im, 255, 128, 0);
    $corlinha = imagecolorallocate($im, 255, 200, 150);
    $corborda = imagecolorallocate($im, 255, 128, 0);
    for($x=10; $x <= 100; $x+=10){
    imageline($im, $x, 0, $x, 50, $corlinha);
    }
    imageline($im, 0, 9, 100, 9, $corlinha);
    imageline($im, 0, 0, 0, 50, $corborda);
    imageline($im, 0, 0, 100, 0, $corborda);
    imageline($im, 0, 17, 100, 17, $corborda);
    imageline($im, 59, 0, 59, 17, $corborda);
    imagestring($im, 5, 8, 1, $seccode, $corfonte);
    imagepng($im);
    imagedestroy($im);
    ?>

    2. Create file "check.php":

    <?php
    session_start();
    if(isset($_POST['key']) AND isset($_SESSION['seccode']) AND $_POST['key']==$_SESSION['seccode']){
    echo 1;
    } else {
    echo 0;
    }
    ?>

    3. Create file "index.html":

    <html>
    <head><title>Capcha</title></head>
    <body>
    <form action="check.php" method="post">
    <img src="capcha.php" alt="" />
    <input type="text" name="key" />
    <input type="submit" value="send" />
    </form>
    </body>
    </html>
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