rest_handle_deprecated_function( string $function_name, string $replacement, string $version )

692function rest_handle_deprecated_function( $function_name, $replacement, $version ) {693	if ( ! WP_DEBUG || headers_sent() ) {694		return;695	}696	if ( ! empty( $replacement ) ) {697		/* translators: 1: Function name, 2: WordPress version number, 3: New function name. */698		$string = sprintf( __( '%1$s (since %2$s; use %3$s instead)' ), $function_name, $version, $replacement );699	} else {700		/* translators: 1: Function name, 2: WordPress version number. */701		$string = sprintf( __( '%1$s (since %2$s; no alternative available)' ), $function_name, $version );702	}703 704	header( sprintf( 'X-WP-DeprecatedFunction: %s', $string ) );705}