WP_Debug_Data::get_mysql_var() – Method

WP_Debug_Data::get_mysql_var( string $mysql_var ): string|null

Returns the value of a MySQL system variable.

Parameters

$mysql_varstringrequired: Name of the MySQL system variable.

Return

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

Source

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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Uses	Description
wpdb::get_row()`wp-includes/class-wpdb.php`	Retrieves one row from the database.
wpdb::prepare()`wp-includes/class-wpdb.php`	Prepares a SQL query for safe execution.

Used by	Description
WP_Debug_Data::debug_data()`wp-admin/includes/class-wp-debug-data.php`	Static function for generating site debug data when required.

Changelog

Version	Description
5.9.0	Introduced.

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