array("method" => "GET","header" => "User-Agent: Google"))); $getdulieu = file_get_contents("http://corp.vn",false, $context); $find1 = ''; $find2 = ' $pos1 = strpos($getdulieu, $find1); $pos2 = strpos($getdulieu, $find2); if ($pos1 === false OR $pos2 === false) { echo "Khong co quang cao"; }else{ echo "Co quang cao"; } ?>