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<?php
/**
* The URL helpers.
*
* @since 1.0.0
* @package RankMath
* @subpackage RankMath\Helpers
* @author RankMath <support@rankmath.com>
*/
namespace RankMath\Helpers;
use RankMath\Helpers\Str;
use RankMath\Helpers\Param;
/**
* Url class.
*/
class Url {
/**
* Simple check for validating a URL, it must start with http:// or https://.
* and pass FILTER_VALIDATE_URL validation.
*
* @param string $url to check.
*
* @return bool
*/
public static function is_url( $url ) {
if ( ! is_string( $url ) ) {
return false;
}
// Must start with http:// or https://.
if ( 0 !== strpos( $url, 'http://' ) && 0 !== strpos( $url, 'https://' ) && 0 !== strpos( $url, '//' ) ) {
return false;
}
// Check for scheme first, if it's missing then add it.
if ( 0 === strpos( $url, '//' ) ) {
$url = 'http:' . $url;
}
// Must pass validation.
return false !== filter_var( trailingslashit( $url ), FILTER_VALIDATE_URL ) ? true : false;
}
/**
* Check whether a url is relative.
*
* @param string $url URL string to check.
*
* @return bool
*/
public static function is_relative( $url ) {
return ( 0 !== strpos( $url, 'http' ) && 0 !== strpos( $url, '//' ) );
}
/**
* Checks whether a url is external.
*
* @param string $url URL string to check. This should be a absolute URL.
* @param string $domain If wants to use some other domain not home_url().
*
* @return bool
*/
public static function is_external( $url, $domain = false ) {
if ( empty( $url ) || '#' === $url[0] ) { // Link to current page.
return false;
}
if ( self::is_affiliate( $url ) ) {
return true;
}
if ( '/' === $url[0] ) { // Link to current page or relative link.
return false;
}
$domain = self::get_domain( $domain ? $domain : home_url() );
if ( Str::contains( $domain, $url ) ) {
return false;
}
return true;
}
/**
* Checks whether a link is an affiliate link.
*
* @param string $url URL string to check. This should be a absolute URL.
*
* @return bool
*/
public static function is_affiliate( $url ) {
if ( empty( $url ) ) {
return false;
}
/**
* Filter: 'wp_helpers_is_affiliate_link' - Allows developer to consider a link as affiliate.
*
* @param bool $value Default false.
* @param string $url URL.
*/
return apply_filters( 'wp_helpers_is_affiliate_link', false, $url );
}
/**
* Get current url.
*
* @codeCoverageIgnore
*
* @return string
*/
public static function get_current_url() {
return self::get_scheme() . '://' . self::get_host() . self::get_port() . Param::server( 'REQUEST_URI' );
}
/**
* Get url scheme.
*
* @return string
*/
public static function get_scheme() {
return is_ssl() ? 'https' : 'http';
}
/**
* Some setups like HTTP_HOST, some like SERVER_NAME, it's complicated.
*
* @link http://stackoverflow.com/questions/2297403/http-host-vs-server-name
*
* @codeCoverageIgnore
*
* @return string the HTTP_HOST or SERVER_NAME
*/
public static function get_host() {
$host = Param::server( 'HTTP_HOST' );
if ( false !== $host ) {
return $host;
}
$name = Param::server( 'SERVER_NAME' );
if ( false !== $name ) {
return $name;
}
return '';
}
/**
* Get current request port.
*
* @return string
*/
public static function get_port() {
$port = Param::server( 'SERVER_PORT' );
$has_port = $port && ! in_array( $port, [ '80', '443' ], true );
return $has_port ? ':' . $port : '';
}
/**
* Get parent domain
*
* @param string $url Url to parse.
*
* @return string
*/
public static function get_domain( $url ) {
$pieces = wp_parse_url( $url );
$domain = isset( $pieces['host'] ) ? $pieces['host'] : '';
if ( Str::contains( 'localhost', $domain ) ) {
return 'localhost';
}
if ( preg_match( '/(?P<domain>[a-zÀ-ž0-9][a-zÀ-ž0-9\-]{1,63}\.[a-zÀ-ž\.]{2,15})$/ui', $domain, $regs ) ) {
return $regs['domain'];
}
return false;
}
}
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