<?php
function olustur () {
    $fontnum=6;
    $text = strtoupper(substr(rand(0,999999999999),-3));
    session_start();
    $_SESSION["guv"] = $text;
    $im = imagecreatetruecolor(125, 75);
    $white = imagecolorallocate($im, 255, 255, 255);
    imagefilledrectangle($im, 0, 0, 400, 200, $white);
    for ($i=0;$i<strlen($text);$i++)
        {
            $font = rand(1,$fontnum).".TTF";
            if ((rand(2,6)%2)) { $angel=rand(0, 30); } else { $angel=rand(330, 360); }
            imagettftext($im, 25, $angel, 10+$i*35, 49, imagecolorallocate($im, rand(1,250), rand(1,250), rand(1,250)), $font,$text[$i]);
        }
    $x=100; $y=100; $size=200;
    header("Content-type: image/png");
    imagepng($im);
    imagedestroy($im);
}
olustur();
?>

<img src="imgcode.php">