PHP使用mysqlnd驱动

我的PHP环境是5.4，使用mysql时突然出现以下错误： mysql_connect(): Headers and client library minor version mismatch. Headers:50508 Library:50166 索性换成mysqlnd扩展，下面简单介绍mysqlnd： mysqlnd(MySQL native driver for PHP)是php5.3后php自

我的PHP环境是5.4，使用mysql时突然出现以下错误：

mysql_connect(): Headers and client library minor version mismatch. Headers:50508 Library:50166

mysqlnd(MySQL native driver for PHP)是php5.3后php自带的mysql驱动，官方推荐使用，优势如下：

A.libmysql驱动是由mysql AB公司(现在是oracle公司)编写, 并按mysql license许可协议发布,所以在PHP中默认是被禁用的.

而mysqlnd是由php官方开发的驱动,以php license许可协议发布,故就规避了许可协议和版权的问题

B.因为mysqlnd内置于PHP源代码,故你在编译安装php时就不需要预先安装mysql server也可以提供mysql client API (mysql_connect, pdo , mysqli), 这将减化一些工作量.

C. mysqlnd是专门为php优化编写的驱动,它使用了PHP本身的特性,在内存管理,性能上比libmysql更有优势. php官方的测试是:libmysql将每条记录在内存中保存了两份,而mysqlnd只保存了一份

D. 一些新的或增强的功能

增强的持久连接

引入特有的函数mysqli_fetch_all()

引入一些性能统计函数 mysqli_get_cache_stats(), mysqli_get_client_stats(), 

mysqli_get_connection_stats(),

使用上述函数,可很容易分析mysql查询的性能瓶颈!

SSL支持(从php 5.3.3开始有效)

压缩协议支持

--with-mysql=/usr/local/mysql 

[root@localhost php54]#./configure --help | grep mysql
  --with-mysql=DIR      Include MySQL support.  DIR is the MySQL base
                          mysqlnd the MySQL native driver will be used
  --with-mysql-sock=SOCKPATH   MySQL/MySQLi/PDO_MYSQL: Location of the MySQL unix socket pointer.
  --with-mysqli=FILE    Include MySQLi support.  FILE is the path
                          to mysql_config.  If no value or mysqlnd is passed
  --enable-embedded-mysqli  MYSQLi: Enable embedded support
  --with-pdo-mysql=DIR    PDO: MySQL support. DIR is the MySQL base directory
                                 If no value or mysqlnd is passed as DIR, the
  --enable-mysqlnd        Enable mysqlnd explicitly, will be done implicitly
  --disable-mysqlnd-compression-support
                            Disable support for the MySQL compressed protocol in mysqlnd
  --with-zlib-dir=DIR       mysqlnd: Set the path to libz install prefix

./configure --prefix=/usr/local/php54 --with-config-file-path=/usr/local/php54/etc --with-zlib --enable-xml --disable-rpath --enable-bcmath --enable-shmop --enable-sysvsem --with-curl --with-curlwrappers --enable-fpm --with-mcrypt --with-gd --with-openssl --with-mhash --enable-sockets --with-ldap --with-ldap-sasl --with-xmlrpc -enable-zip --enable-soap--with-mysql --with-pdo-mysql --with-mysqli

原文地址：PHP使用mysqlnd驱动, 感谢原作者分享。