<?
session_start();
function strrand($length){
$str = "";
while(strlen($str)<$length){
$random=rand(48,122);
if( ($random>47 && $random<58)  ){ 
$str.=chr($random); } }
return $str; }

$text = $_SESSION['captcha_session']=strrand(6);

header("Content-type: image/png");
$im = imagecreatefrompng("images/latar.png");
$color = imagecolorallocate($im, 0, 0, 0);
$font = 'ttf/04B_03B.ttf';
$fontsize=30;
imagettftext($im,  $fontsize, 0, 30, 50, $color, $font, $text );
imagepng($im);
imagedestroy($im); ?>