这篇文章主要介绍了PHP实现的mysql读写分离操作,简单讲述了mysql读写分离的原理,并结合实例形式给出了php针对mysql的读写sql语句操作不同数据库的相关实现技巧,需要的朋友可以参考下
本文实例讲述了PHP实现的mysql读写分离操作。分享给大家供大家参考,具体如下:
首先mysql主从需配置好,基本原理就是判断sql语句是否是select,是的话走master库,否则从slave查
<?php /** * mysql读写分离 */ class db{ public function __construct($sql){ $chestr = strtolower(trim($sql)); //判断sql语句有select关键字的话,就连接读的数据库,否则就连接写数据库 if(substr($chestr,0,6)=='select') { echo 'I am using slave db..<br>'; $link = mysql_connect("192.168.20.201:3306", "open", "123456") or die("Could not connect: " . mysql_error()); mysql_select_db("hadoop"); $result = mysql_query($sql); while($row = mysql_fetch_array($result,MYSQL_ASSOC)){ $data[]=$row; } //print_r($data);exit; echo mysql_get_host_info($link).mysql_get_server_info($link).mysql_get_proto_info($link).mysql_get_client_info().'<br>'; }else{ echo 'I am using master db..<br>'; $link = mysql_connect("192.168.20.195:3306","open","123456") or die("Could not connect: " . mysql_error()); mysql_select_db("hadoop"); $result = mysql_query($sql); //echo @mysql_affected_rows($result); echo mysql_get_host_info($link).mysql_get_server_info($link).mysql_get_proto_info($link).mysql_get_client_info().'<br>'; } } } $master = new db("INSERT INTO user (id,name)VALUES (NULL,'100')"); $slave = new db("SELECT * from `user`");
结果:
I am using master db.. 192.168.20.195 via TCP/IP5.1.73-log10mysqlnd 5.0.8-dev - 20102224 - $Id: 731e5b87ba42146a687c29995d2dfd8b4e40b325 $ I am using slave db.. 192.168.20.201 via TCP/IP5.1.73-log10mysqlnd 5.0.8-dev - 20102224 - $Id: 731e5b87ba42146a687c29995d2dfd8b4e40b325 $
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