ecco ho fatto così:


<?php
$filename = './img/1.jpg';

list($width, $height) = getimagesize($filename);

$image_p = imagecreatetruecolor($width, $height);
$image = imagecreatefromjpeg($filename);
imagecopyresampled($image_p, $image, 0, 0, 0, 0, $width, $height, $width, $height);

imagejpeg($image_p, "./img/1.jpg", 10);
?>


grazie per l'aiuto