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 $
希望本文所述对大家PHP程序设计有所帮助。