MySQL (Original) &reftitle.intro; This extension is deprecated as of PHP 5.5.0, and has been removed as of PHP 7.0.0. Instead, either the mysqli or PDO_MySQL extension should be used. See also the MySQL API Overview for further help while choosing a MySQL API. These functions allow you to access MySQL database servers. More information about MySQL can be found at &url.mysql;. Documentation for MySQL can be found at &url.mysql.docs;. &reference.mysql.setup; &reference.mysql.changelog; &reference.mysql.constants; &reference.mysql.examples; &reference.mysql.reference;