WP_Fatal_Error_Handler::detect_error

	 *
	 * @since 5.2.0
	 *
	 * @return array|null Error that was triggered, or null if no error received or if the error should not be handled.
	 */
	protected function detect_error() {
		$error = error_get_last();

		// No error, just skip the error handling code.
		if ( null === $error ) {
			return null;
		}

		// Bail if this error should not be handled.
		if ( ! $this->should_handle_error( $error ) ) {