PHP random image generator

For benchmark purposes

<?php
error_reporting(E_ALL);

$limit=10;
$width = 120;
$height = 20; 
for($x=0;$x<$limit;$x++) {

    $im = @imagecreatetruecolor(1200, 200);
    $text_color = imagecolorallocate($im, 233, 14, 91);
    $maxrnd = rand(10,70);

    for($y=0;$y<$maxrnd;$y++) {
        imagestring($im, 10+$y*2, 50+$y*2, 50+$y*2,  'StacktextBENCHMARKPOWAjd+klodio nyan', $text_color);
    };  

    imagejpeg($im,"jd/image$x.jpg",100);

    echo "image $x\n";
}

?>