PHP implementation of MySQL read-write separation related content

This article mainly introduces the PHP implementation of the MySQL read and write separation operation, a simple description of the MySQL read and write separation principle, and in combination with the example of PHP for MySQL read and write SQL statement operation of different database related implementation skills, the need for friends can refer to the next

This paper describes the MySQL read-write separation operation implemented by PHP. Share to everyone for your reference, as follows:

First MySQL master and slave needs to be configured, the basic principle is to determine whether the SQL statement is a SELECT, then go to Master Library, otherwise from slave

<?php/*** MySQL read-write separation */class db{public Function __construct ($sql) {$chestr = Strtolower (Trim ($sql)); To determine if the SQL statement has the SELECT keyword, connect to the read database, otherwise connect the write database if (substr ($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, ')"), $slave = new db ("SELECT * from ' user ');

Results:

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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