PHP使用mysqli同时执行多条sql查询语句的实例

<?php $mysqli = new mysqli("localhost","root","","123456");$mysqli->query("set names 'utf8'");//多条sql语句$sql = "select id,name from `user`;";$sql .= "select id,mail from `user`";if ($mysqli->multi_query($sql)){//使用multi_query()执行一条或多条sql语句 do{ if ($rs = $mysqli->store_result()){//store_result()方法获取第一条sql语句查询结果  while ($row=$rs->fetch_row()){  var_dump($row);  echo "<br>";  }  $rs->Close(); //关闭结果集  if ($mysqli->more_results()){ //判断是否还有更多结果集  echo "<hr>";  } } }while($mysqli->next_result()); //next_result()方法获取下一结果集，返回bool值}$mysqli->close(); //关闭数据库连接?>