WP_Debug_Data::get_mysql_var( string $mysql_var )

Returns the value of a MySQL system variable.

Parameters

$mysql_var

(Required) Name of the MySQL system variable.

Return

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

Source

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

	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;
	}

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Changelog

Changelog
Version Description
5.9.0 Introduced.