php - Reduce width of image during upload -

i have code image size reducing...& worked perfectly.but reduce quality want reduce width of image.(min/max - 700px).

<?php $uploaded_file=time().'.'.end(explode('.',basename($_files['uploadedfile']['name']))); move_uploaded_file($_files['uploadedfile']['tmp_name'],$uploaded_file); $img = getimagesize($uploaded_file);   if ($img['mime'] == 'image/jpeg')      {         $uploadedfile= imagecreatefromjpeg($uploaded_file);     }     elseif ($img['mime'] == 'image/gif')      {         $uploadedfile= imagecreatefromgif($uploaded_file);     }     elseif ($img['mime'] == 'image/png')      {         $uploadedfile= imagecreatefrompng($uploaded_file);     }     else     {         die('unsupported image format');     }     $quality=50;     $output=$uploaded_file;     imagejpeg($uploadedfile, "images/comic/".$output, $quality);     imagedestroy($uploadedfile);     unlink($uploaded_file); ?>