PHP连接MySQL数据库的几种方法

1.最简单的方式-mysql（面向过程）

<?php $con = mysql_connect("localhost","root","password"); $select_db = mysql_select_db('test'); if (!$select_db) { die("could not connect to the db:\n" . mysql_error()); } //查询代码 $sql = "select * from db_table"; $res = mysql_query($sql); if (!$res) { die("could get the res:\n" . mysql_error()); } while ($row = mysql_fetch_assoc($res)) { print_r($row); } //查询代码 //关闭数据库连接 mysql_close($con); ?> <?php $con = mysql_connect("l