allows of exchange the size of an image in php

allows of exchange the size of an image in php veiled Ca can be very useful for the site wap/i-mode since it changes as the weight of the file doncs Ca allows as the page would not be too heavy
size.php :
/// < img src="size.php?pic=(url of your image)&w_max=(largor maximum)&h_max=(hautor)">

PHP Code:

$taille = getimagesize("$pic");  $h_i = $taille[1];  $w_i = $taille[0]; 
if($h_i >$h_max) 
{  $convert=$h_max/$h_i;  $h_i=$h_max;  $w_i=ceil($w_i*$convert); 
} 
if($w_i >$w_max) 
{  $convert=$w_max/$w_i;  $w_i=$w_max;  $h_i=ceil($h_i*$convert); 
}; 
$largeur = "$w_i"; $hauteur ="$h_i";
header("Content-Type: image/jpeg");
list($width, $height, $type, $attr) = getimagesize("$pic");

if($type == "1")
{ $img_in = imagecreatefromgif($pic);
}

if($type == "2")
{ $img_in = imagecreatefromjpeg($pic);
}

if($type == "3")
{ $img_in = imagecreatefrompng($pic);
}
$img_out = imagecreatetruecolor($largeur, $hauteur); imagecopyresampled($img_out, $img_in, 0, 0, 0, 0, imagesx($img_out), imagesy($img_out), imagesx($img_in), imagesy($img_in)); $t = imagejpeg($img_out);
echo $t; ?>