头文件和客户端库版本不匹配

在 PHP 中，每当我尝试连接到数据库时(通过 mysql_connect)都会收到以下警告

警告: mysql _ connect () : 头和客户端库的次要版本不匹配

在我的 php -i输出中，在 mysqli 下面列出了以下值

客户端 API 库版本 = > 5.5.24

客户端 API 头版本 = > 5.1.62

我已经尝试更新 php5-mysql 还有 php，但我已经在这两个版本的最新版本。如何更新标题版本，以便不再看到此警告？

剪辑

我的 MySQL 文件都应该更新为最新版本:

$ apt-get install mysql.*5.5
. . .
mysql-client-5.5 is already the newest version.
mysql-server-core-5.5 is already the newest version.
mysql-server-5.5 is already the newest version.
mysql-testsuite-5.5 is already the newest version.
mysql-source-5.5 is already the newest version.

删除旧版本

$ apt-get remove mysql.*5.1
. . .
Package handlersocket-mysql-5.1 is not installed, so not removed
Package mysql-cluster-client-5.1 is not installed, so not removed
Package mysql-cluster-server-5.1 is not installed, so not removed
Package mysql-client-5.1 is not installed, so not removed
Package mysql-client-core-5.1 is not installed, so not removed
Package mysql-server-5.1 is not installed, so not removed
Package mysql-server-core-5.1 is not installed, so not removed
Package mysql-source-5.1 is not installed, so not removed
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最佳答案

Your PHP was compiled with MySQL 5.1 but now it is linking a mysql library of 5.5.X family. You have to upgrade PHP to a version compiled with MySQL 5.5 or revert back mysql client libraries to 5.1.x.

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I am using MariaDB and have a similar problem.

From MariaDB site, it is recommended to fix it by

  1. Switch to using the mysqlnd driver in PHP (Recommended solution).
  2. Recompile PHP with the MariaDB client libraries.
  3. Use your original MySQL client library with the MariaDB.

My problem was fixed by using the mysqlnd driver in Ubuntu:

sudo apt-get install php5-mysqlnd

[update: extra information] Installing this driver also resolve PDO problem that returns integer value as a string. To keep the type as integer, after installing mysqlInd, do this

$db = new PDO('mysql:host='.$host.';dbname='.$db_name, $user, $pass,
array( PDO::ATTR_PERSISTENT => true));
$db->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
$db->setAttribute(PDO::ATTR_STRINGIFY_FETCHES, false);
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The same works for MySQL:

sudo apt-get install php5-mysqlnd

I've read this thread trying to find the solution for MySQL, and I've also seen ken's answer, but I ignored the solution for MariaDB, wasting a few hours that way. It wasn't clear for me that the same may apply to MySQL. This post is just to spare you the few hours I lost.

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For new MySQL 5.6 family you need to install php5-mysqlnd, not php5-mysql.

Remove this version of the mysql driver

sudo apt-get remove php5-mysql

And install this instead

sudo apt-get install php5-mysqlnd
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To compile php from source with MySQL native driver (mysqlnd),

cd /php/source/path
./configure <other-options> --with-mysql --with-mysqli --with-pdo-mysql
make clean    # required if there was a previous make, which could cause various errors during make
make
make install

From /php/source/path/configure --help. 

--with-mysql=DIR        Include MySQL support.  DIR is the MySQL base
directory, if no DIR is passed or the value is
mysqlnd the MySQL native driver will be used
--with-mysqli=FILE      Include MySQLi support.  FILE is the path
to mysql_config.  If no value or mysqlnd is passed
as FILE, the MySQL native driver will be used
--with-pdo-mysql=DIR    PDO: MySQL support. DIR is the MySQL base directory
If no value or mysqlnd is passed as DIR, the
MySQL native driver will be used

One or more PHP MySQL extensions can be included by using these options.
If a value is not passed to these options, or if the value is mysqlnd, MySQL native driver will be used.

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I have this problems when use Percona/MySQL 5.6 and the php driver was compiled with 5.5 and php5-mysql is required for some apps, so I write a script to rebuild the drivers.

https://github.com/falcacibar/php5-mysql-rebuild

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The root reason for this error is that PHP separated itself from the MySQL Client libraries some time ago. So what's happening (mainly on older compiles of linux) is that people will compile PHP against a given build of the MySQL Client (meaning the version of MySQL installed is irrelevant) and not upgrade (in CentOS this package is listed as mysqlclientXX, where XX represents the package number). This also allows the package maintainer to support lower versions of MySQL. It's a messy way to do it, but it was the only way given how PHP and MySQL use different licensing.

MySQLND solves the problem by using PHP's own native driver (the ND), which no longer relies on MySQL Client. It's also compiled for the version of PHP you're using. This is a better solution all around, if for no other reason that MySQLND is made to have PHP talk to MySQL.

If you can't install MySQLND you can actually safely ignore this error for the most part. It's just more of an FYI notice than anything. It just sounds scary.

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I got same php warring in my wordpress site...

Err: Warning: mysql_connect(): Headers and client library minor version mismatch. Headers:50547 Library:50628 in /home/lhu/public_html/innovacarrentalschennai.com/wp-includes/wp-db.php on line 1515

Cause: I updated wp 4.2 to 4.5 version (PHP and MySql mismatch )

I changed wp-db.php on line 1515

$this->dbh = mysql_connect( $this->dbhost, $this->dbuser, $this->dbpassword, $new_link, $client_flags );

to 

if ( WP_DEBUG ) {
$this->dbh = mysql_connect( $this->dbhost, $this->dbuser, $this->dbpassword, $new_link, $client_flags );
} else {
$this->dbh = @mysql_connect( $this->dbhost, $this->dbuser, $this->dbpassword, $new_link, $client_flags );
}

Its got without warring err on my wordpress site

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If u had access cpanel or whm for domain web hosting ...

In cPanel, Go to "Softwares and services" tab, >> and then click "Select PHP Version" >> set your desired version of php...

Warning: mysql_connect(): Headers and client library minor version mismatch. Headers:50547 Library:50628 in chennaitechnologies.com

Current PHP version:

PHP Version [5.2] ( list of 5.2, 5.3, 5.4, 5.5, 5.6 available php versions)

Warning: Changing php modules and php options via PHP Selector for native php version is impossible

I selected 5.6 php version, after that error cleared on my wordpress blog site...

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Warning: mysqli::mysqli(): Headers and client library minor version mismatch.
Headers:50547 Library:100026

I solved the above error by just rebuilding my Apache:

cPanel Version  56.0 (build 25)
Apache Version  2.4.18
PHP Version 5.5.30
MySQL Version   10.0.26-MariaDB
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For WHM and cPanel, some versions need to explicty set mysqli to build.

Using WHM, under CENTOS 6.9 xen pv [dc] v68.0.27, one needed to rebuild Apache/PHP by looking at all options and select mysqli to build. The default was to build the deprecated mysql. Now the depreciation messages are gone and one is ready for future MySQL upgrades.

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Changing PHP version from 5.6 to 5.5 Fixed it.

You have to go to control panel > CGI Script and change PHP version there.

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I ran into the same issue on centos7. Removing php-mysql and installing php-mysqlnd fixed the problem. Thanks Carlos Buenosvinos Zamora for your suggestion.

Here are my commands on centos7 just in case this can be of help to anybody as most of the answers here are based on Debian/Ubuntu.

To find the installed php-mysql package

yum list installed | grep mysql

To remove the installed php-mysql package

yum remove php55w-mysql.x86_64

To install php-mysqlnd

yum install php-mysqlnd.x86_64
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My hosting company told me to fix this by deactivating "mysqli" and activating "nd_mysqli" in the php extensions.

The error is gone, but I don't have the knowledge to understand if this is the right method to fix this.

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Works for MariaDB 10.6.4-MariaDB, php56w, on centos 7.7

  1. yum remove php56w-mysqli
  2. yum install php56w-mysqlnd

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