<?php
  echo "mysql";

  $mysql_conf = array(
  'host'  => '127.0.0.1', 
  'db'   => 'drupal628', 
  'db_user' => 'root', 
  'db_pwd' => 'admin', 
  );
  $mysql_conn = @mysql_connect($mysql_conf['host'], $mysql_conf['db_user'], $mysql_conf['db_pwd']);
  if (!$mysql_conn) {
    echo "失败";
    die("could not connect to the database:\n" . mysql_error());//诊断连接错误
  }else{
    echo "连接成功";
  }

?>

<?php
  echo "mysqli";

 $mysql_conf = array(
  'host'  => '127.0.0.1', 
  'db'   => 'drupal628', 
  'db_user' => 'root', 
  'db_pwd' => 'admin', 
  );

  $mysqli = @new mysqli($mysql_conf['host'], $mysql_conf['db_user'], $mysql_conf['db_pwd']);
  if ($mysqli->connect_errno) {
    echo "失败";
    die("could not connect to the database:\n" . $mysqli->connect_error);//诊断连接错误
  }else{
    echo "成功";
  }

?>