我有这个过滤器，但它是为最低上传要求。我需要一个给sepcific

add_filter(\'wp_handle_upload_prefilter\',\'tc_handle_upload_prefilter\');
function tc_handle_upload_prefilter($file)
{


$img=getimagesize($file[\'tmp_name\']);
$minimum = array(\'width\' => \'640\', \'height\' => \'480\');
$width= $img[0];
$height =$img[1];

if ($width < $minimum[\'width\'] )
    return array("error"=>"Image dimensions are too small. Minimum width is {$minimum[\'width\']}px. Uploaded image width is $width px");

elseif ($height <  $minimum[\'height\'])
    return array("error"=>"Image dimensions are too small. Minimum height is {$minimum[\'height\']}px. Uploaded image height is $height px");
else
return $file; 


}