[php] Generare thumbmails on the fly...

[Jack Barton]

Guardati un pò gli esempi su php.net...
Io ho usato questo...

function resizeToFile ($sourcefile, $dest_x, $dest_y, $targetfile, $jpegqual)
{
   

/* Get the dimensions of the source picture */
   $picsize=getimagesize("$sourcefile");

   $source_x  = $picsize[0];
   $source_y  = $picsize[1];
   $source_id = imageCreateFromJPEG("$sourcefile");

/* Create a new image object (not neccessarily true colour) */
       
   $target_id=imagecreatetruecolor($dest_x, $dest_y);

/* Resize the original picture and copy it into the just created image
   object. Because of the lack of space I had to wrap the parameters to 
   several lines. I recommend putting them in one line in order keep your
   code clean and readable */
       

   $target_pic=imagecopyresampled($target_id,$source_id,0,0,0,0, $dest_x,$dest_y,$source_x,$source_y);

/* Create a jpeg with the quality of "$jpegqual" out of the
   image object "$target_pic".
   This will be saved as $targetfile */
 
   imagejpeg ($target_id,"$targetfile",$jpegqual);

   return true;

}