测试php与mysql连通性

<?php
$conn = new mysqli("cdb-xxxxxxxx.bj.tencentcdb.com:10016", "root", "woxxxxxxxxxxx7l!#");
if ($conn->connect_error) {
die("connect error: " . $conn->connect_error);
}
echo "connect success!";
?>

<?php
$link_id=mysql_connect("cdb-xxxxxxxx.bj.tencentcdb.com:10016", "root", "woxxxxxxxxxxx7l!#") or mysql_error();
if($link_id){
             echo "mysql successful! \n";
}else{
             echo mysql_error();
}
?>