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$big_file=$_FILES['file']['tmp_name'];
$new_file='/tmp/thumbnail.jpg';
copy($big_file, $new_file);
$thumb_width=50;
$thumb_height=35;
$thumb = imagecreatetruecolor($thumb_width,$thumb_height);
$source = imagecreatefromjpeg($big_file);
imagecopyresized($thumb,$source,0,0,50,35,$thumb_width,$thumb_height,188,188);
imagejpeg($thumb,$new_file);
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