View file wapirate/xhtml/captcha.php

<?php

header('Content-type: image/jpeg');

$font = 'ariblk.ttf';

$lineCount = 10;

$fontSize = 10;

$height = 25;

$width = 80;

$ih = imagecreate($width,$height) or die('GD Library must be installed.');

$bgColor = imagecolorallocate($ih,0,0,0);

$lineColor = imagecolorallocate($ih,178,238,238);

$txtColor = imagecolorallocate($ih,254,154,139);

$str = 'abcdefghijklmnopqrstuvwxyz0123456789';

for($x=0;$x<6;$x++){

$pos = rand(0,strlen($str));

$stri .= $str{$pos};

}

$stri = strtolower($stri);

$textbox = imagettfbbox($fontSize,0,$font,$stri) or die('Try replacing imagettfbox with imagettfbbox function on d left.');

$x = ($width - $textbox[4])/2;

$y = ($height - $textbox[5])/2;

imagettftext($ih,$fontSize,0,$x,$y,$txtColor,$font,$stri);

for($x=0;$x<$lineCount;$x++){

$x1 = rand(0,$width); $x2= rand(0,$width); $y1 = rand(0,$width); $y2 = rand(0,$width);

imageline($ih,$x1,$y1,$x2,$y2,$lineColor);

}

imagejpeg($ih,NULL,75);

imagedestroy($ih);

session_start();

$_SESSION['captchaAuth'] = $stri;

?>