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<?php
if(!class_exists('SnapLibURLU')) {
return;
}
/**
* Utility class used for working with URLs
*
* Standard: PSR-2
* @link http://www.php-fig.org/psr/psr-2
*
* @package SnapLib
* @copyright (c) 2017, Snapcreek LLC
* @license https://opensource.org/licenses/GPL-3.0 GNU Public License
*
*/
class SnapLibURLU
{
/**
* Append a new query value to the end of a URL
*
* @param string $url The URL to append the new value to
* @param string $key The new key name
* @param string $value The new key name value
*
* @return string Returns the new URL with with the query string name and value
*/
public static function appendQueryValue($url, $key, $value)
{
$separator = (parse_url($url, PHP_URL_QUERY) == NULL) ? '?' : '&';
$modified_url = $url."$separator$key=$value";
return $modified_url;
}
/*
* Fetches current URL via php
*
* @param bool $queryString If true the query string will also be returned.
*
* @returns The current page url
*/
public static function getCurrentUrl($queryString = true) {
$protocol = 'http';
if ($_SERVER['SERVER_PORT'] == 443 || (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] == 'on')) {
$protocol .= 's';
$protocolPort = $_SERVER['SERVER_PORT'];
} else {
$protocolPort = 80;
}
$host = $_SERVER['HTTP_HOST'];
$port = $_SERVER['SERVER_PORT'];
$request = $_SERVER['PHP_SELF'];
$query = ($queryString === TRUE) ? $_SERVER['QUERY_STRING'] : "";
$url = $protocol . '://' . $host . ($port == $protocolPort ? '' : ':' . $port) . $request . (empty($query) ? '' : '?' . $query);
return $url;
}
/*
* Check to see if the URL is valid
*
* @param string $url A URL e.g without prefix "ajax.googleapis.com"
* @param string $port A valid port number
*
* @returns True if http content exists
*/
public static function urlExists($url = '', $port, $timeout = 5)
{
if (function_exists('curl_version'))
{
// Stip is not
if(empty($url) && !is_string($url))
return false;
$return = true;
$curl = curl_init($url);
//don't fetch the actual page, you only want to check the connection is ok
curl_setopt($curl, CURLOPT_NOBODY, true);
curl_setopt($curl, CURLOPT_CONNECTTIMEOUT ,$timeout);
curl_setopt($curl, CURLOPT_TIMEOUT , $timeout);
$result = curl_exec($curl);
//if request did not fail
if ($result !== false) {
//if request was ok, check response code
$statusCode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
$return = ((int)$statusCode === 404);
}
curl_close($curl);
return (!$return);
}
if (function_exists('fsockopen')) {
$port = isset($port) && is_integer($port) ? $port : 80;
$connected = @fsockopen($url, $port, $errno, $errstr, $timeout); //website and port
if ($connected) {
$is_conn = true;
@fclose($connected);
} else {
$is_conn = false;
}
return $is_conn;
}
return false;
}
}