Returns the value of a MySQL system variable.

$mysql_var string Required

Name of the MySQL system variable.

string|null The variable value on success. Null if the variable does not exist.

File: wp-admin/includes/class-wp-debug-data.php. View all references

public static function get_mysql_var( $mysql_var ) {
	global $wpdb;

	$result = $wpdb->get_row(
		$wpdb->prepare( 'SHOW VARIABLES LIKE %s', $mysql_var ),
		ARRAY_A
	);

	if ( ! empty( $result ) && array_key_exists( 'Value', $result ) ) {
		return $result['Value'];
	}

	return null;
}