Question

php中怎么样判断数据库连接失败?

页面如何自动进行数据库连接失败时候的返回信息的判断?
让当前用户获得相关的信息?

Answer 1

$con = mysql_connect('localhost','root','123123');
if (!$con){
   die('数据库链接失败 ' . mysql_error());
}

Answer 2

<?php
$conn=mysql_connect("localhost","root","123456") or die("连接失败！");
mysql_select_db("oesystem",$conn);
mysql_query("set character_set_connection=utf8");
mysql_query("set character_set_results=utf8");
mysql_query("set character_set_client=utf8");
?>