Today some of my packages in Ubuntu was upgraded automatically, and I didn't think of what was actually going on.
Ever since the update, my local dev-environment doesn't work anymore. First of by not working was mod_rewrite which I had to enable again using a2enmod. But now I've run into an issue that I can't seem to resolve. My application can't seem to find the PDO MySQL driver. When running the application, I get the error failed to open the DB connection: could not find driver.
This is strange, since if I check the phpinfo() the PDO drivers do support MySQL, and the socket path is a valid path.
pdo_mysql client API version is 5.5.35 according to php info.
PHP5: 5.5.3
MySQL: 5.5.35
Connectionstring
mysql:host=127.0.0.1;dbname=MyDB;port=3306
What could be causing this?
The PHP MySQL driver (mysql.so/mysqli.so) and the PHP PDO MySQL driver (pdo_mysql.so) are two separate modules. You need both of them for PDO functionality with MySQL.
It is quite possible that one of them is missing or of an incompatible version - I do not have an Ubuntu system at hand, but on my RPM-based Linux distribution there is a separate package for each module (php-mysql/php-mysqli and php-pdo_mysql). I also expect PDO to be using the newer mysqli.so driver, rather than the obsolete mysql.so one, so you should verify that one is installed as well.
Try this:
sudo apt-get install -y php5-mysql php5 mysql-client
This should automatically restart your apache if any of the dependencies aren't installed.
Try using vagrant.
Dependencies can be isolated, upgraded and downgraded when you like.
Vagrant
Related
I am running a Linux server that already has freetds installed, but is not configured to support dblib. Only sqlite and mysql are currently supported for PDO. MSSQL support is also enabled.
If I want to add support for dblib and enable the PDO Driver for FreeTDS/Sybase DB-lib, do I just need to run this command on the existing install:
./configure --with-pdo-dblib
If so, from which directory would I run the command?
Environment:
PHP Version 5.5.38
CENTOS 6.9
Thank you
If you have configured FreeTDS correctly, you should be able to connect like so:
$pdo = new PDO("dblib:host=mssql;dbname=$dbname", "$dbuser","$dbpwd");
If you can't, this answer gives more explicit instructions: Connect PHP to MSSQL via PDO ODBC
pdo_dblib is typically installed in most Linux distros when you install php-mssql (on CentOS and Ubuntu, for example). If the connect command isn't working, please rewrite your question to include the specific steps you have taken and the error output. Good luck!
Since writing this question, the support team at the company that is hosting this server installed the driver. I don't know exactly what steps they took to do it so I can not post a step by step answer as I would like. Closing this question.
In PHP I'm getting the following warning whenever I try to connect to a database (via mysql_connect)
Warning: mysql_connect(): Headers and client library minor version mismatch. Headers:50162 Library:50524
In my php -i output I have the following values listed under mysqli
Client API library version => 5.5.24
Client API header version => 5.1.62
I've tried updating php5-mysql and php but I'm already at the latest version of both of them. How do I go about updating the header version so I stop seeing this warning?
EDIT
My MySQL files should all be updated to be the latest version:
$ 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.
Removing old versions
$ 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
I am using MariaDB and have a similar problem.
From MariaDB site, it is recommended to fix it by
Switch to using the mysqlnd driver in PHP (Recommended solution).
Recompile PHP with the MariaDB client libraries.
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);
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
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.
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.
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.
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.
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.
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
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...
Eg.
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...
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
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.
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
Works for MariaDB 10.6.4-MariaDB, php56w, on centos 7.7
yum remove php56w-mysqli
yum install php56w-mysqlnd
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.
I have already done much digging on installing/enabling PDO mysql extension on stackoverflow and many other sites, so please do not consider this as a duplicate question
I am on centos 6.5 and has php 5.5.26 which was compiled with make, make install (I know this is an older version so please do not close question or suggest updating to new php version. Also cannot install php using yum as this is what has been installed already me and should not be installed/changed).
So when I did compile php and added it to apache, it does not show mysql PDO driver. I tried putting extension=pdo_mysql.so to ini file with no success (yes I did restart the server as well, after making changes).
It shows pdo enabled, but only for drivers pgsql and sqlite.
Also, tried installing php-mysql package using yum. But the issue with yum installation is it installs 5.3.3 version of driver which complains about compatibility issues as my php version is 5.5.26.
So I am not sure what I need to do install pdo mysql extension
#Peter Darmis was right from his comments.
PHP 5.3.3 was not completely uninstalled, don't know why.
There was already a PHP installed manually be compilation and, as I wasn't aware about this, I was using yum for installation of modules and at that time PHP 5.3.3 got installed which I don't know why it dot un-install properly.
So I ended up with 2 PHP versions, so uninstalled PHP 5.3.3 completely using yum and then resolved this issue compiling PHP with pdo options
So basically I have been always developing with PHP under Windows with the WAMP package and I never had any trouble.
Now, I am trying to transition to Linux (Mint). Everything is well, except for the PDO extension which cannot find the MySQL driver. In fact, it states not having any available drivers at all.
First, I installed Apache:
sudo apt-get install apache2
Then, PHP:
sudo apt-get install php5
MySQL for PHP (I am not exactly sure this was required):
sudo apt-get install php5-mysql
Finally, the command line interface for PHP:
sudo apt-get install php5-cli
Note that I had installed MySQL a while ago for other purposes.
Everything else is working well. The server starts, runs, executes scripts. I am also able to create an instance of PDO, but then it throws a PDOException stating that it cannot find the MySQL driver. The code is typical of a PDO initialization :
$pdo = new PDO("mysql:host=127.0.0.1;db=testdb", "root", "");
I looked at the phpinfo() and for the value PDO I see no drivers. However, I see the line MySQL driver for PDO followed by the names of its authors, but I cannot tell if it guarantees the presence of the driver. Notice that I also see the authors of all the other drivers (SQLite, PostgreSQL, Oracle, etc.).
The command php -m (which, according to the php --help, lists all modules compiled with PHP) also clearly indicates that both PDO and pdo_mysql are installed.
My search returned a lot of results about the extensions pdo.so and pdo-mysql.so. I have been trying to reference them into the php.ini file without success. It would probably have a higher chance of success if I actually had these files, but so far I have been unable to find them.
So, here we are, about five hours later, with me being completely stuck.
Thank you.
In PHP I'm getting the following warning whenever I try to connect to a database (via mysql_connect)
Warning: mysql_connect(): Headers and client library minor version mismatch. Headers:50162 Library:50524
In my php -i output I have the following values listed under mysqli
Client API library version => 5.5.24
Client API header version => 5.1.62
I've tried updating php5-mysql and php but I'm already at the latest version of both of them. How do I go about updating the header version so I stop seeing this warning?
EDIT
My MySQL files should all be updated to be the latest version:
$ 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.
Removing old versions
$ 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
I am using MariaDB and have a similar problem.
From MariaDB site, it is recommended to fix it by
Switch to using the mysqlnd driver in PHP (Recommended solution).
Recompile PHP with the MariaDB client libraries.
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);
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
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.
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.
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.
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.
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.
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
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...
Eg.
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...
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
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.
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
Works for MariaDB 10.6.4-MariaDB, php56w, on centos 7.7
yum remove php56w-mysqli
yum install php56w-mysqlnd
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.