php強制輸出到瀏覽器下載

$file_name="test.mp3"; $mp3_url = "";header( "Pragma: public" );header('Expires: 0');header( "Cache-Control: must-revalidate, post-check=0, pre-check=0" );header( "Cache-Control: private", false );header( "Content-Type: application/force-download ");//header( "Content-Length: " . $fileSize);header('Content-Disposition: attachment; filename="'.$file_name.'"');header('Content-Transfer-Encoding: binary');header('Connection: close');readfile($mp3_url);exit();