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function is not described

wp_get_update_php_url() WP 5.1.0

Gets the URL to learn more about updating the PHP version the site is running on.

This URL can be overridden by specifying an environment variable WP_UPDATE_PHP_URL or by using the 'wp_update_php_url' filter. Providing an empty string is not allowed and will result in the default URL being used. Furthermore the page the URL links to should preferably be localized in the site language.

Hooks from the function
Return

String. URL to learn more about updating PHP.

Usage

wp_get_update_php_url();

Changelog

Since 5.1.0 Introduced.

Code of wp get update php url: wp-includes/functions.php WP 5.4.2

<?php
function wp_get_update_php_url() {
	$default_url = wp_get_default_update_php_url();

	$update_url = $default_url;
	if ( false !== getenv( 'WP_UPDATE_PHP_URL' ) ) {
		$update_url = getenv( 'WP_UPDATE_PHP_URL' );
	}

	/**
	 * Filters the URL to learn more about updating the PHP version the site is running on.
	 *
	 * Providing an empty string is not allowed and will result in the default URL being used. Furthermore
	 * the page the URL links to should preferably be localized in the site language.
	 *
	 * @since 5.1.0
	 *
	 * @param string $update_url URL to learn more about updating PHP.
	 */
	$update_url = apply_filters( 'wp_update_php_url', $update_url );

	if ( empty( $update_url ) ) {
		$update_url = $default_url;
	}

	return $update_url;
}