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HomeBackend DevelopmentPHP Tutorialphp-fpm连不上mysql的问题?

下面是错误提示:
Warning: mysqli_connect(): Headers and client library minor version mismatch. Headers:50625 Library:50541 in /srv/pma/test.php on line 8

Warning: mysqli_connect(): (HY000/2002): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) in /srv/pma/test.php on line 8

我在php.ini中设置的mysql.default_socket=/var/mysql/mysql.sock,不知道为什么不到这个文件去找socket,使用命令行可以连接mysql,同时密码也设置了,请问这是怎么回事?

回复内容:

下面是错误提示:
Warning: mysqli_connect(): Headers and client library minor version mismatch. Headers:50625 Library:50541 in /srv/pma/test.php on line 8

Warning: mysqli_connect(): (HY000/2002): Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) in /srv/pma/test.php on line 8

我在php.ini中设置的mysql.default_socket=/var/mysql/mysql.sock,不知道为什么不到这个文件去找socket,使用命令行可以连接mysql,同时密码也设置了,请问这是怎么回事?

你php的数据库host应该使用的是localhost,这个时候会使用socket的方式来连接数据库。

报错提示中的socket文件路径和你php.ini中的不一致。
猜想1、可能是你修改了php.ini,但是没有重启php-fpm。
猜想2、可能你的机器上多个路径下存在php.ini,而php-fpm加载的不是你修改的php.ini.可以随便写个页面通过phpinfo来确认一下你的php.ini 具体路径。

另外请查看一下你的mysql配置文件my.cnf中mysqld段关于socket的指定的路径。

php.ini里关于MySQL Socket的几个配置项:
mysql.default_socket 对应 mysql 系列函数
mysqli.default_socket 对应 mysqli 系列函数
pdo_mysql.default_socket 对应 pdo_mysql 系列函数

不建议使用php.ini里的MySQL连接信息,建议直接在mysqli_connect里指明socket或者端口的位置:

<code>$mysqli = mysqli_connect(
    null, // $app['db_host'], 
    $app['db_username'], 
    $app['db_password'], 
    $app['db_name'], 
    null, // $app['db_port']
    $app['db_socket']
);
</code>
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