<?php
	session_start();
	header("Content-type: image/jpeg");

	$im=imagecreatetruecolor(150,40);

	$feher=imagecolorallocate($im,255,255,255);
	$fekete=imagecolorallocate($im,0,0,0);
	$szurke=imagecolorallocate($im,125,125,125);

	$chars="abcdefhjkmnpqrstuxy345789";
	$str="";
	for ($i=0;$i<6;$i++)
	{
		$rand=rand(0,strlen($chars)-1);
		$str.=$chars[$rand];
	}
	
	$_SESSION["captcha"]=$str;
	
	imagefill($im,0,0,$feher);
	imagettftext($im,20,0,12,32,$szurke,"font.ttf",$str);
	imagettftext($im,20,0,10,30,$fekete,"font.ttf",$str);
 
	imagejpeg($im);
	imagedestroy($im);
?>