weixin_44936767的博客

<?php //_query执行SQL语句,并返回结果集function _query($_sql) { global $conn;//申明全局变量 if (!$_result = mysqli_query($conn,$_sql)) { echo mysqli_error($conn); exit('SQL执行失败'); } //$_result = mysqli_query($conn,$_sql); //检查错误用 return $_result;}// _mysqli