WP_CLI\Utils

get_mysql_version() │ WP-CLI 2.12.0

Get the version of the MySQL or MariaDB database.

No Hooks.

Returns

String. Version of the MySQL/MariaDB database, or an empty string if not found.

Usage

get_mysql_version();

Changelog

Since 2.12.0 Introduced.
Since 2.12.0 Now also checks for MariaDB.

get_mysql_version() code WP-CLI 2.13.0-alpha

wp-cli/php/utils.php 
function get_mysql_version() {
	static $version = null;

	if ( null !== $version ) {
		return $version;
	}

	$db_type = get_db_type();

	if ( 'sqlite' !== $db_type ) {
		$result = Process::create( "/usr/bin/env $db_type --version", null, null )->run();

		if ( 0 !== $result->return_code ) {
			$version = '';
		} else {
			$version = trim( $result->stdout );
		}
	}

	return $version;
}