<?php $con = mysqli_connect('rm-bp1o9djohok39tn53no.mysql.rds.aliyuncs.com', 'volunteer', 'yuande!@#$%678', "volunteer", "3306"); //检查连接 if(!$con) { die("连接错误: " . mysqli_connect_error()); } mysqli_select_db($con,'volunteer'); echo "OK"; ?>