wp_get_update_php_url(): string

8420function wp_get_update_php_url() {8421	$default_url = wp_get_default_update_php_url();8422 8423	$update_url = $default_url;8424	if ( false !== getenv( 'WP_UPDATE_PHP_URL' ) ) {8425		$update_url = getenv( 'WP_UPDATE_PHP_URL' );8426	}8427 8428	/**8429	 * Filters the URL to learn more about updating the PHP version the site is running on.8430	 *8431	 * Providing an empty string is not allowed and will result in the default URL being used. Furthermore8432	 * the page the URL links to should preferably be localized in the site language.8433	 *8434	 * @since 5.1.08435	 *8436	 * @param string $update_url URL to learn more about updating PHP.8437	 */8438	$update_url = apply_filters( 'wp_update_php_url', $update_url );8439 8440	if ( empty( $update_url ) ) {8441		$update_url = $default_url;8442	}8443 8444	return $update_url;8445}