WP_Fatal_Error_Handler::detect_error(): array|null

Source

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 ) ) {
		return null;
	}
	return $error;
}

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