Redimensionner une image

<?php
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/* Titre          : Redimensionner une image                                  */
/*                                                                            */
/* URL            : http://www.dev3w.com/scripts1-PHP.htm                     */
/* Auteur         : moderateur                                                */
/* Date édition   : 14 Avril 2009                                             */
/* Website auteur : http://wwww.dev3w.com                                     */
/*                                                                            */
/******************************************************************************/


$chemin = "http://www.site.ext/img.jpg"; // le chemin en absolu
// vous pouvez travailler en url relative aussi: img.jpg
$x = 500; # largeur a redimensionner
$y = 150; # hauteur a redimensionner

Header("Content-type: image/jpeg");
$img_new = imagecreatefromjpeg($chemin);
$size = getimagesize($chemin);
$img_mini = imagecreatetruecolor ($x, $y);
imagecopyresampled ($img_mini,$img_new,0,0,0,0,$x,$y,$size[0],$size[1]);
imagejpeg($img_mini);

// affiche
echo 'La photo a été redimensionnée automatiquement.
      <br /> 
      <img src="'.$chemin.'" alt="" />
      ';

?>