Title: WP_REST_URL_Details_Controller::get_icon
Published: February 3, 2022
Last modified: May 20, 2026

---

# WP_REST_URL_Details_Controller::get_icon( string $html, string $url ): string

## In this article

 * [Parameters](https://developer.wordpress.org/reference/classes/wp_rest_url_details_controller/get_icon/?output_format=md#parameters)
 * [Return](https://developer.wordpress.org/reference/classes/wp_rest_url_details_controller/get_icon/?output_format=md#return)
 * [Source](https://developer.wordpress.org/reference/classes/wp_rest_url_details_controller/get_icon/?output_format=md#source)
 * [Related](https://developer.wordpress.org/reference/classes/wp_rest_url_details_controller/get_icon/?output_format=md#related)
 * [Changelog](https://developer.wordpress.org/reference/classes/wp_rest_url_details_controller/get_icon/?output_format=md#changelog)

[ Back to top](https://developer.wordpress.org/reference/classes/wp_rest_url_details_controller/get_icon/?output_format=md#wp--skip-link--target)

This function’s access is marked private. This means it is not intended for use 
by plugin or theme developers, only by core. It is listed here for completeness.

Parses the site icon from the provided HTML.

## 󠀁[Parameters](https://developer.wordpress.org/reference/classes/wp_rest_url_details_controller/get_icon/?output_format=md#parameters)󠁿

 `$html`stringrequired

The HTML from the remote website at URL.

`$url`stringrequired

The target website URL.

## 󠀁[Return](https://developer.wordpress.org/reference/classes/wp_rest_url_details_controller/get_icon/?output_format=md#return)󠁿

 string The icon URI on success. Empty string if not found.

## 󠀁[Source](https://developer.wordpress.org/reference/classes/wp_rest_url_details_controller/get_icon/?output_format=md#source)󠁿

    ```php
    private function get_icon( $html, $url ) {
    	// Grab the icon's link element.
    	$pattern = '#<link\s[^>]*rel=(?:[\"\']??)\s*(?:icon|shortcut icon|icon shortcut)\s*(?:[\"\']??)[^>]*\/?>#isU';
    	preg_match( $pattern, $html, $element );
    	if ( empty( $element[0] ) || ! is_string( $element[0] ) ) {
    		return '';
    	}
    	$element = trim( $element[0] );

    	// Get the icon's href value.
    	$pattern = '#href=([\"\']??)([^\" >]*?)\\1[^>]*#isU';
    	preg_match( $pattern, $element, $icon );
    	if ( empty( $icon[2] ) || ! is_string( $icon[2] ) ) {
    		return '';
    	}
    	$icon = trim( $icon[2] );

    	// If the icon is a data URL, return it.
    	$parsed_icon = parse_url( $icon );
    	if ( isset( $parsed_icon['scheme'] ) && 'data' === $parsed_icon['scheme'] ) {
    		return $icon;
    	}

    	// Attempt to convert relative URLs to absolute.
    	if ( ! is_string( $url ) || '' === $url ) {
    		return $icon;
    	}
    	$parsed_url = parse_url( $url );
    	if ( isset( $parsed_url['scheme'] ) && isset( $parsed_url['host'] ) ) {
    		$root_url = $parsed_url['scheme'] . '://' . $parsed_url['host'] . '/';
    		$icon     = WP_Http::make_absolute_url( $icon, $root_url );
    	}

    	return $icon;
    }
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/rest-api/endpoints/class-wp-rest-url-details-controller.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.0/src/wp-includes/rest-api/endpoints/class-wp-rest-url-details-controller.php#L308)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/rest-api/endpoints/class-wp-rest-url-details-controller.php#L308-L342)

## 󠀁[Related](https://developer.wordpress.org/reference/classes/wp_rest_url_details_controller/get_icon/?output_format=md#related)󠁿

| Uses | Description | 
| [WP_Http::make_absolute_url()](https://developer.wordpress.org/reference/classes/wp_http/make_absolute_url/)`wp-includes/class-wp-http.php` |

Converts a relative URL to an absolute URL relative to a given URL.

  |

| Used by | Description | 
| [WP_REST_URL_Details_Controller::parse_url_details()](https://developer.wordpress.org/reference/classes/wp_rest_url_details_controller/parse_url_details/)`wp-includes/rest-api/endpoints/class-wp-rest-url-details-controller.php` |

Retrieves the contents of the title tag from the HTML response.

  |

## 󠀁[Changelog](https://developer.wordpress.org/reference/classes/wp_rest_url_details_controller/get_icon/?output_format=md#changelog)󠁿

| Version | Description | 
| [5.9.0](https://developer.wordpress.org/reference/since/5.9.0/) | Introduced. |

## User Contributed Notes

You must [log in](https://login.wordpress.org/?redirect_to=https%3A%2F%2Fdeveloper.wordpress.org%2Freference%2Fclasses%2Fwp_rest_url_details_controller%2Fget_icon%2F)
before being able to contribute a note or feedback.