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

WP_REST_URL_Details_Controller::get_icon() WordPress Method

The WP_REST_URL_Details_Controller::get_icon() method is used to get the icon for a given URL.

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

Parses the site icon from the provided HTML.

Contents

Parameters

$html

(string)(Required)The HTML from the remote website at URL.

$url

(string)(Required)The target website URL.

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Return

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

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Source

File: wp-includes/rest-api/endpoints/class-wp-rest-url-details-controller.php

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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;
}

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Changelog

Changelog
VersionDescription
5.9.0Introduced.
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