get_bloginfo()

function get_bloginfo( $show = '', $filter = 'raw' ) {
	switch ( $show ) {
		case 'home':    // Deprecated.
		case 'siteurl': // Deprecated.
			_deprecated_argument(
				__FUNCTION__,
				'2.2.0',
				sprintf(
					/* translators: 1: 'siteurl'/'home' argument, 2: bloginfo() function name, 3: 'url' argument. */
					__( 'The %1$s option is deprecated for the family of %2$s functions. Use the %3$s option instead.' ),
					'<code>' . $show . '</code>',
					'<code>bloginfo()</code>',
					'<code>url</code>'
				)
			);
			// Intentional fall-through to be handled by the 'url' case.
		case 'url':
			$output = home_url();
			break;
		case 'gcurl':
			$output = site_url();
			break;
		case 'description':
			$output = get_option( 'blogdescription' );
			break;
		case 'rdf_url':
			$output = get_feed_link( 'rdf' );
			break;
		case 'rss_url':
			$output = get_feed_link( 'rss' );
			break;
		case 'rss2_url':
			$output = get_feed_link( 'rss2' );
			break;
		case 'atom_url':
			$output = get_feed_link( 'atom' );
			break;
		case 'comments_atom_url':
			$output = get_feed_link( 'comments_atom' );
			break;
		case 'comments_rss2_url':
			$output = get_feed_link( 'comments_rss2' );
			break;
		case 'pingback_url':
			$output = site_url( 'xmlrpc.php' );
			break;
		case 'stylesheet_url':
			$output = get_stylesheet_uri();
			break;
		case 'stylesheet_directory':
			$output = get_stylesheet_directory_uri();
			break;
		case 'template_directory':
		case 'template_url':
			$output = get_template_directory_uri();
			break;
		case 'admin_email':
			$output = get_option( 'admin_email' );
			break;
		case 'charset':
			$output = get_option( 'blog_charset' );
			if ( '' === $output ) {
				$output = 'UTF-8';
			}
			break;
		case 'html_type':
			$output = get_option( 'html_type' );
			break;
		case 'version':
			global $gc_version;
			$output = $gc_version;
			break;
		case 'language':
			/*
			 * translators: Translate this to the correct language tag for your locale,
			 * see https://www.w3.org/International/articles/language-tags/ for reference.
			 * Do not translate into your own language.
			 */
			$output = __( 'html_lang_attribute' );
			if ( 'html_lang_attribute' === $output || preg_match( '/[^a-zA-Z0-9-]/', $output ) ) {
				$output = determine_locale();
				$output = str_replace( '_', '-', $output );
			}
			break;
		case 'text_direction':
			_deprecated_argument(
				__FUNCTION__,
				'2.2.0',
				sprintf(
					/* translators: 1: 'text_direction' argument, 2: bloginfo() function name, 3: is_rtl() function name. */
					__( 'The %1$s option is deprecated for the family of %2$s functions. Use the %3$s function instead.' ),
					'<code>' . $show . '</code>',
					'<code>bloginfo()</code>',
					'<code>is_rtl()</code>'
				)
			);
			if ( function_exists( 'is_rtl' ) ) {
				$output = is_rtl() ? 'rtl' : 'ltr';
			} else {
				$output = 'ltr';
			}
			break;
		case 'name':
		default:
			$output = get_option( 'blogname' );
			break;
	}

	$url = true;
	if ( strpos( $show, 'url' ) === false &&
		strpos( $show, 'directory' ) === false &&
		strpos( $show, 'home' ) === false ) {
		$url = false;
	}

	if ( 'display' === $filter ) {
		if ( $url ) {
			/**
			 * Filters the URL returned by get_bloginfo().
			 *
			 * @since 2.0.5
			 *
			 * @param string $output The URL returned by bloginfo().
			 * @param string $show   Type of information requested.
			 */
			$output = apply_filters( 'bloginfo_url', $output, $show );
		} else {
			/**
			 * Filters the site information returned by get_bloginfo().
			 *
			 * @since 0.71
			 *
			 * @param mixed  $output The requested non-URL site information.
			 * @param string $show   Type of information requested.
			 */
			$output = apply_filters( 'bloginfo', $output, $show );
		}
	}

	return $output;
}