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Headers and Client Library Minor Version Mismatch: Resolving the Issue
When attempting to connect to a database using PHP's mysql_connect function, you may encounter the following warning:
Warning: mysql_connect(): Headers and client library minor version mismatch. Headers:50162 Library:50524
This mismatch can occur when the client library version used by PHP differs from the header version provided by the MySQL server. To resolve this issue, it is essential to update the headers to match the client library.
Updating Header Versions
If you have already updated both php5-mysql and php, the mismatch could still persist. The headers can be updated by following these steps:
1. Upgrade to the Latest Version of MySQL
Ensure that all your MySQL files are up-to-date. Run the following command:
$ apt-get install mysql.*5.5
2. Install the mysqlnd Driver
For MariaDB users, it is recommended to switch to the mysqlnd driver in PHP. This can be installed using the following command:
sudo apt-get install php5-mysqlnd
Once the driver is installed, the problem should be resolved.
Alternative Solutions
If the recommended solution does not resolve the issue, consider the following alternatives:
Additional Information
Emulating Prepared Statements and Integer Representation
After installing the mysqlnd driver, you may need to modify the PDO connection parameters to prevent integer values from being returned as strings. To do this, set the following attributes after creating the PDO object:
$db->setAttribute(PDO::ATTR_EMULATE_PREPARES, false); $db->setAttribute(PDO::ATTR_STRINGIFY_FETCHES, false);
By following these steps, you can resolve the headers and client library minor version mismatch issue and establish a stable connection to your database.
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