<?php   function createThumbnail($imageDirectory, $imageName, $thumbDirectory, $thumbWidth, $quality){       $details = getimagesize("$imageDirectory/$imageName") or die('Please only upload images.');       $type = preg_replace('@^.+(?<=/)(.+)$@', '$1', $details['mime']);       eval('$srcImg = imagecreatefrom'.$type.'("$imageDirectory/$imageName");');       $thumbHeight = $details[1] * ($thumbWidth / $details[0]);       $thumbImg = imagecreatetruecolor($thumbWidth, $thumbHeight);       imagecopyresampled($thumbImg, $srcImg, 0, 0, 0, 0, $thumbWidth, $thumbHeight,        $details[0], $details[1]);       eval('image'.$type.'($thumbImg, "$thumbDirectory/$imageName"'.       (($type=='jpeg')?', $quality':'').');');       imagedestroy($srcImg);       imagedestroy($thumbImg);   }     foreach ($_FILES["pictures"]["error"] as $key => $error) {      if ($error == UPLOAD_ERR_OK) {          $tmp_name = $_FILES["pictures"]["tmp_name"][$key];          $name = $_FILES["pictures"]["name"][$key];          move_uploaded_file($tmp_name, "data/$name");          createThumbnail("/location/of/main/image", $name, "/location/to/store/thumb", 120, 80);          //120 = thumb width  ::  80 = thumb quality (1-100)      }   }   ?>