View file social/sys/inc/captcha.php

<?
class captcha
{
	var $str;
	var $x = 100;
	var $y = 40;
	var $img;
	var $gif=false;
	var $png=false;
	var $jpg=false;

	function captcha($str)
	{
		if (!function_exists('gd_info'))
		{
			header('Location: /style/errors/gd_err.gif');
			exit;
		}
		if (imagetypes() & IMG_PNG)$this->png=true;
		if (imagetypes() & IMG_GIF)$this->gif=true;
		if (imagetypes() & IMG_JPG)$this->jpg=true;
		$this->str=$str;

		$this->img=imagecreatetruecolor($this->x, $this->y);
		imagefill($this->img, 0, 0, imagecolorallocate ($this->img, 255, 255, 255));
	}

	function create()
	{
		for ($i=0; $i<5 ;$i++ ) 
		{
			$n = $this->str{$i};
			if ($this->png)$num[$n]=imagecreatefrompng(H.'/style/captcha/'.$n.'.png');
			elseif ($this->gif)$num[$n]=imagecreatefromgif(H.'/style/captcha/'.$n.'.gif');
			elseif ($this->jpg)$num[$n]=imagecreatefromjpeg(H.'/style/captcha/'.$n.'.jpg');
			imagecopy($this->img, $num[$n], $i*15+10, 8, 0, 0, 15, 20);
		}
	}
	
	function MultiWave()
	{
		include_once H.'sys/inc/MultiWave.php';
		$this->img=MultiWave($this->img);
	}

	function colorize($value=90)
	{
		if (function_exists('imagefilter'))
		imagefilter($this->img, IMG_FILTER_COLORIZE, mt_rand(0, $value), mt_rand(0, $value), mt_rand(0, $value));
	}

	function output($q=50)
	{
		@ob_end_clean();
		if ($this->jpg)
		{
			header("Content-type: image/jpeg");
			imagejpeg($this->img,null,$q);
		}
		elseif ($this->png)
		{
			header("Content-type: image/png");
			imagepng($this->img);
		}
		elseif ($this->gif)
		{
			header("Content-type: image/gif");
			imagegif($this->img);
		}
		exit;
	}
}
?>