158 lines
3.1 KiB
PHP
158 lines
3.1 KiB
PHP
<?php
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/**
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* Helper class for URL handling. Parses URLs and allows adding parameters from variables.
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*
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* $url = new URL('/path/to/webpage.php?initialParameter=whatever');
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* $url->parameters['somevar'] = $somevar;
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* $url->somevar = $somevar;
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* echo $url->getURL();
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*
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* @copyright 2006-2009 City of Bloomington, Indiana.
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* @license http://www.gnu.org/copyleft/gpl.html GNU/GPL, see LICENSE.txt
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* @author Cliff Ingham <inghamn@bloomington.in.gov>
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*/
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class URL
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{
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private $scheme;
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private $host;
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private $path;
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private $anchor;
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public $parameters = array();
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public function __construct($script)
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{
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$script = urldecode($script);
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// If scheme wasn't provided add one to the start of the string
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if (!preg_match('|://|',$script)) {
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$scheme = $_SERVER['SERVER_PORT']==443 ? 'https://' : 'http://';
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$script = $scheme.$script;
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}
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$url = parse_url($script);
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$this->scheme = $url['scheme'];
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$this->host = $url['host'];
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$this->path = $url['path'];
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if (isset($url['fragment'])) {
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$this->anchor = $url['fragment'];
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}
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if (isset($url['query'])) {
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parse_str($url['query'],$this->parameters);
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}
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}
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/**
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* Returns just the base portion of the url
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* @return string
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*/
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public function getScript() {
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return $this->scheme.'://'.$this->host.$this->path;
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}
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/**
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* Returns the full, properly formatted and escaped URL
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* @return string
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*/
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public function __toString() {
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return $this->getURL();
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}
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/**
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* Returns the full, properly formatted and escaped URL
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*
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* @return string
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*/
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public function getURL()
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{
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$url = $this->getScript();
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if (count($this->parameters)) {
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$url.= '?'.http_build_query($this->parameters,'');
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}
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if ($this->anchor) {
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$url.= '#'.$this->anchor;
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}
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return $url;
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}
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/**
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* Returns just the protocol (http://, https://) portion
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* @return string
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*/
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public function getScheme() {
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if (!$this->scheme) {
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$this->scheme = 'http://';
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}
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return $this->scheme;
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}
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/**
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* Sets the protocol for the URL (http, https)
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* @param string $protocol
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*/
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public function setScheme($string)
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{
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if (!preg_match('|://|',$string)) {
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$string .= '://';
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}
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$this->scheme = $string;
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}
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/**
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* Cleans out any query parameters that had empty values
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*/
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public function purgeEmptyParameters()
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{
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$this->parameters = $this->array_filter_recursive($this->parameters);
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}
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private function array_filter_recursive(array $input)
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{
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foreach ($input as &$value) {
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if (is_array($value)) {
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$value = $this->array_filter_recursive($value);
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}
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}
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return array_filter($input);
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}
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/**
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* @param string $key
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* @return string
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*/
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public function __get($key)
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{
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if (isset($this->parameters[$key])) {
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return $this->parameters[$key];
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}
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}
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/**
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* @param string $key
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* @param string $value
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*/
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public function __set($key,$value)
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{
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$this->parameters[$key] = $value;
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}
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/**
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* @param string $key
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* @return boolean
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*/
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public function __isset($key)
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{
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return isset($this->parameters[$key]);
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}
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/**
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* @param string $key
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*/
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public function __unset($key)
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{
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unset($this->parameters[$key]);
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}
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}
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