[If you haven't yet] been able to find a simple conversion back to string from a parsed url, here's an example:
<?php
$url = 'http://usr:pss@example.com:81/mypath/myfile.html?a=b&b[]=2&b[]=3#myfragment';
if ($url === unparse_url(parse_url($url))) {
print "YES, they match!\n";
}
function unparse_url($parsed_url) {
$scheme = isset($parsed_url['scheme']) ? $parsed_url['scheme'] . '://' : '';
$host = isset($parsed_url['host']) ? $parsed_url['host'] : '';
$port = isset($parsed_url['port']) ? ':' . $parsed_url['port'] : '';
$user = isset($parsed_url['user']) ? $parsed_url['user'] : '';
$pass = isset($parsed_url['pass']) ? ':' . $parsed_url['pass'] : '';
$pass = ($user || $pass) ? "$pass@" : '';
$path = isset($parsed_url['path']) ? $parsed_url['path'] : '';
$query = isset($parsed_url['query']) ? '?' . $parsed_url['query'] : '';
$fragment = isset($parsed_url['fragment']) ? '#' . $parsed_url['fragment'] : '';
return "$scheme$user$pass$host$port$path$query$fragment";
}
?>
parse_url
(PHP 4, PHP 5, PHP 7)
parse_url — Parse a URL and return its components
Description
This function parses a URL and returns an associative array containing any of the various components of the URL that are present. The values of the array elements are not URL decoded.
This function is not meant to validate the given URL, it only breaks it up into the above listed parts. Partial URLs are also accepted, parse_url() tries its best to parse them correctly.
Parameters
-
url -
The URL to parse. Invalid characters are replaced by _.
Return Values
On seriously malformed URLs, parse_url() may return
FALSE.
If the component parameter is omitted, an
associative array is returned. At least one element will be
present within the array. Potential keys within this array are:
- scheme - e.g. http
- host
- port
- user
- pass
- path
- query - after the question mark ?
- fragment - after the hashmark #
If the component parameter is specified,
parse_url() returns a string (or an
integer, in the case of PHP_URL_PORT)
instead of an array. If the requested component doesn't exist
within the given URL, NULL will be returned.
Changelog
| Version | Description |
|---|---|
| 5.4.7 | Fixed host recognition when scheme is omitted and a leading component separator is present. |
| 5.3.3 |
Removed the E_WARNING that was emitted when URL
parsing failed.
|
| 5.1.2 | Added the component parameter. |
Examples
Example #1 A parse_url() example
<?php
$url = 'http://username:password@hostname:9090/path?arg=value#anchor';
var_dump(parse_url($url));
var_dump(parse_url($url, PHP_URL_SCHEME));
var_dump(parse_url($url, PHP_URL_USER));
var_dump(parse_url($url, PHP_URL_PASS));
var_dump(parse_url($url, PHP_URL_HOST));
var_dump(parse_url($url, PHP_URL_PORT));
var_dump(parse_url($url, PHP_URL_PATH));
var_dump(parse_url($url, PHP_URL_QUERY));
var_dump(parse_url($url, PHP_URL_FRAGMENT));
?>
The above example will output:
array(8) {
["scheme"]=>
string(4) "http"
["host"]=>
string(8) "hostname"
["port"]=>
int(9090)
["user"]=>
string(8) "username"
["pass"]=>
string(8) "password"
["path"]=>
string(5) "/path"
["query"]=>
string(9) "arg=value"
["fragment"]=>
string(6) "anchor"
}
string(4) "http"
string(8) "username"
string(8) "password"
string(8) "hostname"
int(9090)
string(5) "/path"
string(9) "arg=value"
string(6) "anchor"
Example #2 A parse_url() example with missing scheme
<?php
$url = '//www.example.com/path?googleguy=googley';
// Prior to 5.4.7 this would show the path as "//www.example.com/path"
var_dump(parse_url($url));
?>
The above example will output:
array(3) {
["host"]=>
string(15) "www.example.com"
["path"]=>
string(5) "/path"
["query"]=>
string(17) "googleguy=googley"
}
Notes
Note:
This function may not give correct results for relative URLs.
Note:
This function is intended specifically for the purpose of parsing URLs and not URIs. However, to comply with PHP's backwards compatibility requirements it makes an exception for the file:// scheme where triple slashes (file:///...) are allowed. For any other scheme this is invalid.
See Also
- pathinfo() - Returns information about a file path
- parse_str() - Parses the string into variables
- http_build_query() - Generate URL-encoded query string
- dirname() - Returns a parent directory's path
- basename() - Returns trailing name component of path
- » RFC 3986
add a note
User Contributed Notes 53 notes
thomas at gielfeldt dot com ¶
7 years ago
jerome at chaman dot ca ¶
4 years ago
It may be worth reminding that the value of the #fragment never gets sent to the server. Anchors processing is exclusively client-side.
lauris () lauris ! lv ¶
5 years ago
Here is utf-8 compatible parse_url() replacement function based on "laszlo dot janszky at gmail dot com" work. Original incorrectly handled URLs with user:pass. Also made PHP 5.5 compatible (got rid of now deprecated regex /e modifier).
<?php
/**
* UTF-8 aware parse_url() replacement.
*
* @return array
*/
function mb_parse_url($url)
{
$enc_url = preg_replace_callback(
'%[^:/@?&=#]+%usD',
function ($matches)
{
return urlencode($matches[0]);
},
$url
);
$parts = parse_url($enc_url);
if($parts === false)
{
throw new \InvalidArgumentException('Malformed URL: ' . $url);
}
foreach($parts as $name => $value)
{
$parts[$name] = urldecode($value);
}
return $parts;
}
?>
mys5droid at gmail dot com ¶
3 years ago
I have coded a function which converts relative URL to absolute URL for a project of mine. Considering I could not find it elsewhere, I figured I would post it here.
The following function takes in 2 parameters, the first parameter is the URL you want to convert from relative to absolute, and the second parameter is a sample of the absolute URL.
Currently it does not resolve '../' in the URL, only because I do not need it. Most webservers will resolve this for you. If you want it to resolve the '../' in the path, it just takes minor modifications.
<?php
function relativeToAbsolute($inurl, $absolute) {
// Get all parts so not getting them multiple times :)
$absolute_parts = parse_url($absolute);
// Test if URL is already absolute (contains host, or begins with '/')
if ( (strpos($inurl, $absolute_parts['host']) == false) ) {
// Define $tmpurlprefix to prevent errors below
$tmpurlprefix = "";
// Formulate URL prefix (SCHEME)
if (!(empty($absolute_parts['scheme']))) {
// Add scheme to tmpurlprefix
$tmpurlprefix .= $absolute_parts['scheme'] . "://";
}
// Formulate URL prefix (USER, PASS)
if ((!(empty($absolute_parts['user']))) and (!(empty($absolute_parts['pass'])))) {
// Add user:port to tmpurlprefix
$tmpurlprefix .= $absolute_parts['user'] . ":" . $absolute_parts['pass'] . "@";
}
// Formulate URL prefix (HOST, PORT)
if (!(empty($absolute_parts['host']))) {
// Add host to tmpurlprefix
$tmpurlprefix .= $absolute_parts['host'];
// Check for a port, add if exists
if (!(empty($absolute_parts['port']))) {
// Add port to tmpurlprefix
$tmpurlprefix .= ":" . $absolute_parts['port'];
}
}
// Formulate URL prefix (PATH) and only add it if the path to image does not include ./
if ( (!(empty($absolute_parts['path']))) and (substr($inurl, 0, 1) != '/') ) {
// Get path parts
$path_parts = pathinfo($absolute_parts['path']);
// Add path to tmpurlprefix
$tmpurlprefix .= $path_parts['dirname'];
$tmpurlprefix .= "/";
}
else {
$tmpurlprefix .= "/";
}
// Lets remove the '/'
if (substr($inurl, 0, 1) == '/') { $inurl = substr($inurl, 1); }
// Lets remove the './'
if (substr($inurl, 0, 2) == './') { $inurl = substr($inurl, 2); }
return $tmpurlprefix . $inurl;
}
else {
// Path is already absolute. Return it :)
return $inurl;
}
}
// Define a sample absolute URL
$absolute = "http://" . "user:pass@example.com:8080/path/to/index.html"; // Just evading php.net spam filter, not sure how example.com is spam...
/* EXAMPLE 1 */
echo relativeToAbsolute($absolute, $absolute) . "\n";
/* EXAMPLE 2 */
echo relativeToAbsolute("img.gif", $absolute) . "\n";
/* EXAMPLE 3 */
echo relativeToAbsolute("/img.gif", $absolute) . "\n";
/* EXAMPLE 4 */
echo relativeToAbsolute("./img.gif", $absolute) . "\n";
/* EXAMPLE 5 */
echo relativeToAbsolute("../img.gif", $absolute) . "\n";
/* EXAMPLE 6 */
echo relativeToAbsolute("images/img.gif", $absolute) . "\n";
/* EXAMPLE 7 */
echo relativeToAbsolute("/images/img.gif", $absolute) . "\n";
/* EXAMPLE 8 */
echo relativeToAbsolute("./images/img.gif", $absolute) . "\n";
/* EXAMPLE 9 */
echo relativeToAbsolute("../images/img.gif", $absolute) . "\n";
?>
OUTPUTS:
http :// user:pass@example.com:8080/path/to/index.html
http :// user:pass@example.com:8080/path/to/img.gif
http :// user:pass@example.com:8080/img.gif
http :// user:pass@example.com:8080/path/to/img.gif
http :// user:pass@example.com:8080/path/to/../img.gif
http :// user:pass@example.com:8080/path/to/images/img.gif
http :// user:pass@example.com:8080/images/img.gif
http :// user:pass@example.com:8080/path/to/images/img.gif
http :// user:pass@example.com:8080/path/to/../images/img.gif
Sorry if the above code is not your style, or if you see it as "messy" or you think there is a better way to do it. I removed as much of the white space as possible.
Improvements are welcome :)
james at roundeights dot com ¶
9 years ago
I was writing unit tests and needed to cause this function to kick out an error and return FALSE in order to test a specific execution path. If anyone else needs to force a failure, the following inputs will work:
<?php
parse_url("http:///example.com");
parse_url("http://:80");
parse_url("http://user@:80");
?>
laszlo dot janszky at gmail dot com ¶
7 years ago
Created another parse_url utf-8 compatible function.
<?php
function mb_parse_url($url) {
$encodedUrl = preg_replace('%[^:/?#&=\.]+%usDe', 'urlencode(\'$0\')', $url);
$components = parse_url($encodedUrl);
foreach ($components as &$component)
$component = urldecode($component);
return $components;
}
?>
ivijan dot stefan at gmail dot com ¶
5 years ago
Here's a good way to using parse_url () gets the youtube link.
This function I used in many works:
<?php
function youtube($url, $width=560, $height=315, $fullscreen=true)
{
parse_str( parse_url( $url, PHP_URL_QUERY ), $my_array_of_vars );
$youtube= '<iframe allowtransparency="true" scrolling="no" width="'.$width.'" height="'.$height.'" src="//www.youtube.com/embed/'.$my_array_of_vars['v'].'" frameborder="0"'.($fullscreen?' allowfullscreen':NULL).'></iframe>';
return $youtube;
}
// show youtube on my page
$url='http://www.youtube.com/watch?v=yvTd6XxgCBE';
youtube($url, 560, 315, true);
?>
parse_url () allocates a unique youtube code and put into iframe link and displayed on your page. The size of the videos choose yourself.
Enjoy.
jesse at example dot com ¶
9 years ago
@ solenoid: Your code was very helpful, but it fails when the current URL has no query string (it appends '&' instead of '?' before the query). Below is a fixed version that catches this edge case and corrects it.
<?php
function modify_url($mod)
{
$url = "http://".$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
$query = explode("&", $_SERVER['QUERY_STRING']);
if (!$_SERVER['QUERY_STRING']) {$queryStart = "?";} else {$queryStart = "&";}
// modify/delete data
foreach($query as $q)
{
list($key, $value) = explode("=", $q);
if(array_key_exists($key, $mod))
{
if($mod[$key])
{
$url = preg_replace('/'.$key.'='.$value.'/', $key.'='.$mod[$key], $url);
}
else
{
$url = preg_replace('/&?'.$key.'='.$value.'/', '', $url);
}
}
}
// add new data
foreach($mod as $key => $value)
{
if($value && !preg_match('/'.$key.'=/', $url))
{
$url .= $queryStart.$key.'='.$value;
}
}
return $url;
}
?>
Anonymous ¶
1 year ago
Hello, for some odd reason, parse_url returns the host (ex. example.com) as the path when no scheme is provided in the input url. So I've written a quick function to get the real host:
<?php
function getHost($Address) {
$parseUrl = parse_url(trim($Address));
return trim($parseUrl[host] ? $parseUrl[host] : array_shift(explode('/', $parseUrl[path], 2)));
}
getHost("example.com"); // Gives example.com
getHost("http://example.com"); // Gives example.com
getHost("www.example.com"); // Gives www.example.com
getHost("http://example.com/xyz"); // Gives example.com
?>
You could try anything! It gives the host (including the subdomain if exists).
Hope it helped you.
https://vb.3dlat.com/
to1ne at hotmail dot com ¶
11 years ago
Based on the idea of "jbr at ya-right dot com" have I been working on a new function to parse the url:
<?php
function parseUrl($url) {
$r = "^(?:(?P<scheme>\w+)://)?";
$r .= "(?:(?P<login>\w+):(?P<pass>\w+)@)?";
$r .= "(?P<host>(?:(?P<subdomain>[\w\.]+)\.)?" . "(?P<domain>\w+\.(?P<extension>\w+)))";
$r .= "(?::(?P<port>\d+))?";
$r .= "(?P<path>[\w/]*/(?P<file>\w+(?:\.\w+)?)?)?";
$r .= "(?:\?(?P<arg>[\w=&]+))?";
$r .= "(?:#(?P<anchor>\w+))?";
$r = "!$r!"; // Delimiters
preg_match ( $r, $url, $out );
return $out;
}
print_r ( parseUrl ( 'me:you@sub.site.org:29000/pear/validate.html?happy=me&sad=you#url' ) );
?>
This returns:
Array
(
[0] => me:you@sub.site.org:29000/pear/validate.html?happy=me&sad=you#url
[scheme] =>
[1] =>
[login] => me
[2] => me
[pass] => you
[3] => you
[host] => sub.site.org
[4] => sub.site.org
[subdomain] => sub
[5] => sub
[domain] => site.org
[6] => site.org
[extension] => org
[7] => org
[port] => 29000
[8] => 29000
[path] => /pear/validate.html
[9] => /pear/validate.html
[file] => validate.html
[10] => validate.html
[arg] => happy=me&sad=you
[11] => happy=me&sad=you
[anchor] => url
[12] => url
)
So both named and numbered array keys are possible.
It's quite advanced, but I think it works in any case... Let me know if it doesn't...
zappascripts at gmail com ¶
2 years ago
Here's a simple class I made that makes use of this parse_url.
I needed a way for a page to retain get parameters but also edit or add onto them.
I also had some pages that needed the same GET paramaters so I also added a way to change the path.
<?php
class Paths{
private $url;
public function __construct($url){
$this->url = parse_url($url);
}
public function returnUrl(){
$return = $this->url['path'].'?'.$this->url['query'];
$return = (substr($return,-1) == "&")? substr($return,0,-1) : $return;
$this->resetQuery();
return $return;
}
public function changePath($path){
$this->url['path'] = $path;
}
public function editQuery($get,$value){
$parts = explode("&",$this->url['query']);
$return = "";
foreach($parts as $p){
$paramData = explode("=",$p);
if($paramData[0] == $get){
$paramData[1] = $value;
}
$return .= implode("=",$paramData).'&';
}
$this->url['query'] = $return;
}
public function addQuery($get,$value){
$part = $get."=".$value;
$and = ($this->url['query'] == "?") ? "" : "&";
$this->url['query'] .= $and.$part;
}
public function checkQuery($get){
$parts = explode("&",$this->url['query']);
foreach($parts as $p){
$paramData = explode("=",$p);
if($paramData[0] == $get)
return true;
}
return false;
}
public function buildQuery($get,$value){
if($this->checkQuery($get))
$this->editQuery($get,$value);
else
$this->addQuery($get,$value);
}
public function resetQuery(){
$this->url = parse_url($_SERVER['REQUEST_URI']);
}
}
?>
Useage:
Test.php?foo=1:
<?php
$path = new Paths($_SERVER['REQUEST_URI']);
$path->changePath("/baz.php");
$path->buildQuery("foo",2);
$path->buildQuery("bar",3);
echo $path->returnUrl();
?>
returns: /baz.php?foo=2&bar=3
Hope this is of some use to someone!
admin at griefer1999 dot uhostfull dot com ¶
4 years ago
<?php
function url_parse($url){
$sflfdfldf=$url;
if(strpos($url,"?")>-1){
$a=explode("?",$url,2);
$url=$a[0];
$query=$a[1];
}
if(strpos($url,"://")>-1){
$scheme=substr($url,0,strpos($url,"//")-1);
$url=substr($url,strpos($url,"//")+2,strlen($url));
}
if(strpos($url,"/")>-1){
$a=explode("/",$url,2);
$url=$a[0];
$path="/".$a[1];
}
if(strpos($url,":")>-1){
$a=explode(":",$url,2);
$url=$a[0];
$port=$a[1];
}
$host=$url;
$url=null;
foreach(array("url","scheme","host","port","path","query") as $var){
if(!empty($$var)){
$return[$var]=$$var;
}
}
//return array("url"=>$sflfdfldf,"scheme"=>$scheme,"host"=>$host,"port"=>$port,"path"=>$path,"query"=>$query,"a"=>$url);
return $return;
}
?>
<?php
/* Compare two outputs */
//mine
print_r(url_parse("http://login.yahoo.com?.src=ym&.intl=gb&.lang=zh-Hans-HK&.done=https://mail.yahoo.com"));
//internal
print_r(parse_url("http://login.yahoo.com?.src=ym&.intl=gb&.lang=zh-Hans-HK&.done=https://mail.yahoo.com"));
?>
need_sunny at yahoo dot com ¶
9 years ago
Thanks to xellisx for his parse_query function. I used it in one of my projects and it works well. But it has an error. I fixed the error and improved it a little bit. Here is my version of it:
<?php
// Originally written by xellisx
function parse_query($var)
{
/**
* Use this function to parse out the query array element from
* the output of parse_url().
*/
$var = parse_url($var, PHP_URL_QUERY);
$var = html_entity_decode($var);
$var = explode('&', $var);
$arr = array();
foreach($var as $val)
{
$x = explode('=', $val);
$arr[$x[0]] = $x[1];
}
unset($val, $x, $var);
return $arr;
}
?>
At the first line there was parse_query($val), I made it $var. It used to return a null array before this fix.
I have added the parse_url line. So now the function will only focus in the query part, not the whole URL. This is useful if something like below is done:
<?php
$my_GET = parse_query($_SERVER['REQUEST_URI']);
?>
nirazuelos at gmail dot com ¶
9 years ago
Hello, for some odd reason, parse_url returns the host (ex. example.com) as the path when no scheme is provided in the input url. So I've written a quick function to get the real host:
<?php
function getHost($Address) {
$parseUrl = parse_url(trim($Address));
return trim($parseUrl[host] ? $parseUrl[host] : array_shift(explode('/', $parseUrl[path], 2)));
}
getHost("example.com"); // Gives example.com
getHost("http://example.com"); // Gives example.com
getHost("www.example.com"); // Gives www.example.com
getHost("http://example.com/xyz"); // Gives example.com
?>
You could try anything! It gives the host (including the subdomain if exists).
Hope it helped you.
Michael ¶
3 months ago
There's a quirk where this function will return the host as the "path" if there is a leading space.
<?php
$url = ' https://foobar.com:80/mypath/myfile.php';
print_r(parse_url($url));
/*
Array
(
[path] => https://foobar.com:80/mypath/myfile.php
)
*/
print_r(trim(parse_url($url)));
/*
Array
(
[scheme] => https
[host] => foobar.com
[port] => 80
[path] => /mypath/myfile.php
)
*/
?>
demerit ¶
2 years ago
There is a change in PHP 7 (I noticed it in 7.1 upgrading from 5.3) where if the password portion has an octothorpe (#) in it, parsing fails in 7.1, whereas it succeeds in 5.3.
Anonymous ¶
1 year ago
To get the params (url query) as Associative array, use this function:
<?php
/**
* Returns the url query as associative array
*
* @param string query
* @return array params
*/
function convertUrlQuery($query) {
$queryParts = explode('&', $query);
$params = array();
foreach ($queryParts as $param) {
$item = explode('=', $param);
$params[$item[0]] = $item[1];
}
return $params;
}
?>
bramg dot net1 at gmail dot com ¶
1 year ago
this is my 404 error page is this ok or it need improvements
<?php
/**
* 404.php
*
* The template for displaying 404 pages (not found)
*
* @author BetterStudio
* @package Publisher
* @version 2.0.2
*/
get_header();
// Shows breadcrumb
if ( publisher_show_breadcrumb() ) {
Better_Framework()->breadcrumb()->generate( array(
'before' => '<div class="container bf-breadcrumb-container">',
'after' => '</div>',
'custom_class' => 'bc-top-style'
) );
}
?>
<div class="content-wrap">
<main <?php publisher_attr( 'content', '' ); ?>>
<div class="container layout-1-col layout-no-sidebar">
<div class="row main-section">
<div class="content-column content-404">
<div class="row first-row">
<div class="col-lg-12 text-404-section">
<p class="text-404 heading-typo">404</p>
</div>
<div class="col-lg-12 desc-section">
<h1 class="title-404"><?php publisher_translation_echo( '404_not_found' ); ?></h1>
<p><?php publisher_translation_echo( '404_not_found_message' ); ?></p>
<div class="action-links clearfix">
<script type="text/javascript">
if (document.referrer) {
document.write('<div class="search-action-container"><a href="' + document.referrer + '"><i class="fa fa-angle-double-right"></i> <?php publisher_translation_echo( '404_go_previous_page' ); ?></a></div>');
}
</script>
<div class="search-action-container">
<a href="<?php echo esc_url( home_url( '/' ) ); ?>"><i
class="fa fa-angle-double-right"></i> <?php publisher_translation_echo( '404_go_homepage' ); ?>
</a>
</div>
</div>
</div>
</div><!-- .first-row -->
<div class="row second-row">
<div class="col-lg-12">
<div class="top-line">
<?php get_search_form(); ?>
</div>
</div>
</div><!-- .second-row -->
</div><!-- .content-column -->
</div><!-- .main-section -->
</div> <!-- .layout-1-col -->
</main><!-- main -->
</div><!-- .content-wrap -->
<?php get_footer(); ?>
https://bramg.net
bramg dot net1 at gmail dot com ¶
1 year ago
this is my 404 error page is this ok or it need improvements
<?php
/**
* 404.php
*
* The template for displaying 404 pages (not found)
*
* @author BetterStudio
* @package Publisher
* @version 2.0.2
*/
get_header();
// Shows breadcrumb
if ( publisher_show_breadcrumb() ) {
Better_Framework()->breadcrumb()->generate( array(
'before' => '<div class="container bf-breadcrumb-container">',
'after' => '</div>',
'custom_class' => 'bc-top-style'
) );
}
?>
<div class="content-wrap">
<main <?php publisher_attr( 'content', '' ); ?>>
<div class="container layout-1-col layout-no-sidebar">
<div class="row main-section">
<div class="content-column content-404">
<div class="row first-row">
<div class="col-lg-12 text-404-section">
<p class="text-404 heading-typo">404</p>
</div>
<div class="col-lg-12 desc-section">
<h1 class="title-404"><?php publisher_translation_echo( '404_not_found' ); ?></h1>
<p><?php publisher_translation_echo( '404_not_found_message' ); ?></p>
<div class="action-links clearfix">
<script type="text/javascript">
if (document.referrer) {
document.write('<div class="search-action-container"><a href="' + document.referrer + '"><i class="fa fa-angle-double-right"></i> <?php publisher_translation_echo( '404_go_previous_page' ); ?></a></div>');
}
</script>
<div class="search-action-container">
<a href="<?php echo esc_url( home_url( '/' ) ); ?>"><i
class="fa fa-angle-double-right"></i> <?php publisher_translation_echo( '404_go_homepage' ); ?>
</a>
</div>
</div>
</div>
</div><!-- .first-row -->
<div class="row second-row">
<div class="col-lg-12">
<div class="top-line">
<?php get_search_form(); ?>
</div>
</div>
</div><!-- .second-row -->
</div><!-- .content-column -->
</div><!-- .main-section -->
</div> <!-- .layout-1-col -->
</main><!-- main -->
</div><!-- .content-wrap -->
<?php get_footer(); ?>
https://bramg.net
Anonymous ¶
1 year ago
This function will attempt to parse relative URLs but relaying on it can produce unexpected behavior that can cause some hard to track bugs. (The following results are obtained from PHP 5.5.19)
Attempting to parse a url like this
http://example.com/entities/GOA:98/?search=8989157d1f22
Correctly produces
<?php
array (
'scheme' => 'http',
'host' => 'example.com',
'path' => '/entities/GOA:98/',
'query' => 'search=8989157d1f22',
);
?>
However, Attempting to parse the relative URL
entities/GOA:98/?search=8989157d1f22
<?php
array (
'host' => 'entities',
'port' => 98,
'path' => '/GOA:98/',
'query' => 'search=8989157d1f22',
)
?>
If I change :98 to :A98 parse_url parses the URL correctly as
<?php
array (
'path' => 'entities/GOA:A98/',
'query' => 'search=8989157d1f22',
)
?>
Bottom line, Avoid using parse_url for relative urls unless you have tested the expected input and you know parse_url will handle them well.
https://forums.hawacastle.com/
Rob ¶
4 years ago
I've been working on a generic class that would make URI parsing / building a little easier.
The composer package is here: https://packagist.org/packages/enrise/urihelper
And the repository is here: https://github.com/Enrise/UriHelper
An example of the usage:
<?php
$uri = new \Enrise\Uri('http://usr:pss@example.com:81/mypath/myfile.html?a=b&b[]=2&b[]=3#myfragment');
echo $uri->getScheme(); // http
echo $uri->getUser(); // usr
echo $uri->getPass(); // pss
echo $uri->getHost(); // example.com
echo $uri->getPort(); // 81
echo $uri->getPath(); // /mypath/myfile.html
echo $uri->getQuery(); // a=b&b[]=2&b[]=3
echo $uri->getFragment(); // myfragment
echo $uri->isSchemeless(); // false
echo $uri->isRelative(); // false
$uri->setScheme('scheme:child:scheme.VALIDscheme123:');
$uri->setPort(null);
echo $uri->getUri(); //scheme:child:scheme.VALIDscheme123:usr:pss@example.com/mypath/myfile.html?a=b&b[]=2&b[]=3#myfragment
?>
utilmind ¶
6 years ago
parse_url doesn't works if the protocol doesn't specified. This seems like sandard, even the youtube doesn't gives the protocol name when generates code for embedding which have a look like "//youtube.com/etc".
So, to avoid bug, you must always check, whether the provided url has the protocol, and if not (starts with 2 slashes) -- add the "http:" prefix.
therselman at gmail ¶
7 years ago
UTF-8 aware parse_url() replacement.
I've realized that even though UTF-8 characters are not allowed in URL's, I have to work with a lot of them and parse_url() will break.
Based largely on the work of "mallluhuct at gmail dot com", I added parse_url() compatible "named values" which makes the array values a lot easier to work with (instead of just numbers). I also implemented detection of port, username/password and a back-reference to better detect URL's like this: //en.wikipedia.com
... which, although is technically an invalid URL, it's used extensively on sites like wikipedia in the href of anchor tags where it's valid in browsers (one of the types of URL's you have to support when crawling pages). This will be accurately detected as the host name instead of "path" as in all other examples.
I will submit my complete function (instead of just the RegExp) which is an almost "drop-in" replacement for parse_url(). It returns a cleaned up array (or false) with values compatible with parse_url(). I could have told the preg_match() not to store the unused extra values, but it would complicate the RegExp and make it more difficult to read, understand and extend. The key to detecting UTF-8 characters is the use of the "u" parameter in preg_match().
<?php
function parse_utf8_url($url)
{
static $keys = array('scheme'=>0,'user'=>0,'pass'=>0,'host'=>0,'port'=>0,'path'=>0,'query'=>0,'fragment'=>0);
if (is_string($url) && preg_match(
'~^((?P<scheme>[^:/?#]+):(//))?((\\3|//)?(?:(?P<user>[^:]+):(?P<pass>[^@]+)@)?(?P<host>[^/?:#]*))(:(?P<port>\\d+))?' .
'(?P<path>[^?#]*)(\\?(?P<query>[^#]*))?(#(?P<fragment>.*))?~u', $url, $matches))
{
foreach ($matches as $key => $value)
if (!isset($keys[$key]) || empty($value))
unset($matches[$key]);
return $matches;
}
return false;
}
?>
UTF-8 URL's can/should be "normalized" after extraction with this function.
solenoid at example dot com ¶
9 years ago
Here's a piece of code that modifies, replaces or removes the url query. This can typically used in paging situations where there are more parameters than the page.
<?php
function modify_url($mod)
{
$url = "http://".$_SERVER['HTTP_HOST'].$_SERVER['REQUEST_URI'];
$query = explode("&", $_SERVER['QUERY_STRING']);
// modify/delete data
foreach($query as $q)
{
list($key, $value) = explode("=", $q);
if(array_key_exists($key, $mod))
{
if($mod[$key])
{
$url = preg_replace('/'.$key.'='.$value.'/', $key.'='.$mod[$key], $url);
}
else
{
$url = preg_replace('/&?'.$key.'='.$value.'/', '', $url);
}
}
}
// add new data
foreach($mod as $key => $value)
{
if($value && !preg_match('/'.$key.'=/', $url))
{
$url .= '&'.$key.'='.$value;
}
}
return $url;
}
// page url: "http://www.example.com/page.php?p=5&show=list&style=23"
$url = modify_url(array('p' => 4, 'show' => 'column'));
// $url = "http://www.example.com/page.php?p=4&show=column&style=23"
?>
ap dot public1 at gmail dot com ¶
10 years ago
Simple static library that allows easy manipulation of url parameters:
<?php
/**
* File provides easy way to manipulate url parameters
* @author Alexander Podgorny
*/
class Url {
/**
* Splits url into array of it's pieces as follows:
* [scheme]://[user]:[pass]@[host]/[path]?[query]#[fragment]
* In addition it adds 'query_params' key which contains array of
* url-decoded key-value pairs
*
* @param String $sUrl Url
* @return Array Parsed url pieces
*/
public static function explode($sUrl) {
$aUrl = parse_url($sUrl);
$aUrl['query_params'] = array();
$aPairs = explode('&', $aUrl['query']);
DU::show($aPairs);
foreach($aPairs as $sPair) {
if (trim($sPair) == '') { continue; }
list($sKey, $sValue) = explode('=', $sPair);
$aUrl['query_params'][$sKey] = urldecode($sValue);
}
return $aUrl;
}
/**
* Compiles url out of array of it's pieces (returned by explodeUrl)
* 'query' is ignored if 'query_params' is present
*
* @param Array $aUrl Array of url pieces
*/
public static function implode($aUrl) {
//[scheme]://[user]:[pass]@[host]/[path]?[query]#[fragment]
$sQuery = '';
// Compile query
if (isset($aUrl['query_params']) && is_array($aUrl['query_params'])) {
$aPairs = array();
foreach ($aUrl['query_params'] as $sKey=>$sValue) {
$aPairs[] = $sKey.'='.urlencode($sValue);
}
$sQuery = implode('&', $aPairs);
} else {
$sQuery = $aUrl['query'];
}
// Compile url
$sUrl =
$aUrl['scheme'] . '://' . (
isset($aUrl['user']) && $aUrl['user'] != '' && isset($aUrl['pass'])
? $aUrl['user'] . ':' . $aUrl['pass'] . '@'
: ''
) .
$aUrl['host'] . (
isset($aUrl['path']) && $aUrl['path'] != ''
? $aUrl['path']
: ''
) . (
$sQuery != ''
? '?' . $sQuery
: ''
) . (
isset($aUrl['fragment']) && $aUrl['fragment'] != ''
? '#' . $aUrl['fragment']
: ''
);
return $sUrl;
}
/**
* Parses url and returns array of key-value pairs of url params
*
* @param String $sUrl
* @return Array
*/
public static function getParams($sUrl) {
$aUrl = self::explode($sUrl);
return $aUrl['query_params'];
}
/**
* Removes existing url params and sets them to those specified in $aParams
*
* @param String $sUrl Url
* @param Array $aParams Array of Key-Value pairs to set url params to
* @return String Newly compiled url
*/
public static function setParams($sUrl, $aParams) {
$aUrl = self::explode($sUrl);
$aUrl['query'] = '';
$aUrl['query_params'] = $aParams;
return self::implode($aUrl);
}
/**
* Updates values of existing url params and/or adds (if not set) those specified in $aParams
*
* @param String $sUrl Url
* @param Array $aParams Array of Key-Value pairs to set url params to
* @return String Newly compiled url
*/
public static function updateParams($sUrl, $aParams) {
$aUrl = self::explode($sUrl);
$aUrl['query'] = '';
$aUrl['query_params'] = array_merge($aUrl['query_params'], $aParams);
return self::implode($aUrl);
}
}
?>
vdklah at hotmail dot com ¶
10 years ago
Some example that determines the URL port.
When port not specified, it derives it from the scheme.
<?php
function getUrlPort( $urlInfo )
{
if( isset($urlInfo['port']) ) {
$port = $urlInfo['port'];
} else { // no port specified; get default port
if (isset($urlInfo['scheme']) ) {
switch( $urlInfo['scheme'] ) {
case 'http':
$port = 80; // default for http
break;
case 'https':
$port = 443; // default for https
break;
case 'ftp':
$port = 21; // default for ftp
break;
case 'ftps':
$port = 990; // default for ftps
break;
default:
$port = 0; // error; unsupported scheme
break;
}
} else {
$port = 0; // error; unknown scheme
}
}
return $port;
}
$url = "http://nl3.php.net/manual/en/function.parse-url.php";
$urlInfo = parse_url( $url );
$urlPort = getUrlPort( $urlInfo );
if( $urlPort !== 0 ) {
print 'Found URL port: '.$urlPort;
} else {
print 'ERROR: Could not find port at URL: '.$url;
}
?>
xellisx ¶
11 years ago
I need to parse out the query string from the referrer, so I created this function.
<?php
function parse_query($val)
{
/**
* Use this function to parse out the query array element from
* the output of parse_url().
*/
$var = html_entity_decode($var);
$var = explode('&', $var);
$arr = array();
foreach($var as $val)
{
$x = explode('=', $val);
$arr[$x[0]] = $x[1];
}
unset($val, $x, $var);
return $arr;
}
?>
nospam at spellingcow dot com ¶
11 years ago
URL's in the query string of a relative URL will cause a problem
fails:
/page.php?foo=bar&url=http://www.example.com
parses:
http://www.foo.com/page.php?foo=bar&url=http://www.example.com
andrewtheartist at hotmail dot com ¶
11 years ago
Here's the easiest way to get the URL to the path that your script is in (so not the actual script name itself, just the complete URL to the folder it's in)
echo "http://".$_SERVER['HTTP_HOST'].dirname($_SERVER['PHP_SELF']);
Mark Dobrinic ¶
8 years ago
It seems the host-part strips off the last [:port] off the end of the hostname
When something is wrong in the actual request, this proves to be the wrong way to do things.
It would be better to not strip off the [:port], but to keep the string *before* the first [:port] as the hostname.
Problem with (maybe malformed) provided HTTP_HOST
hostname:443:443
that resolved in
'host' => 'hostname:443'
Which gave me problems.
Solution would be to enforce this yourself, explicitly:
<?php
$p = parse_url( $url );
$host = explode(':', $p['host']);
$hostname = $host[0];
?>
Nick Smith ¶
12 years ago
Note that older versions of PHP (e.g., 4.1) returned an blank string as the path for URLs without any path, such as http://www.php.net
However more recent versions of PHP (e.g., 4.4.7) don't set the path element in the array, so old code will get a PHP warning about an undefined index.
stevenlewis at hotmail dot com ¶
12 years ago
an update to the glue url function.
you are able to put a host and a path without a slash at the beginning of the path
<?php
function glue_url($parsed)
{
if (! is_array($parsed)) return false;
$uri = isset($parsed['scheme']) ? $parsed['scheme'].':'.((strtolower($parsed['scheme']) == 'mailto') ? '':'//'): '';
$uri .= isset($parsed['user']) ? $parsed['user'].($parsed['pass']? ':'.$parsed['pass']:'').'@':'';
$uri .= isset($parsed['host']) ? $parsed['host'] : '';
$uri .= isset($parsed['port']) ? ':'.$parsed['port'] : '';
if(isset($parsed['path']))
{
$uri .= (substr($parsed['path'],0,1) == '/')?$parsed['path']:'/'.$parsed['path'];
}
$uri .= isset($parsed['query']) ? '?'.$parsed['query'] : '';
$uri .= isset($parsed['fragment']) ? '#'.$parsed['fragment'] : '';
return $uri;
}
?>
spam at paulisageek dot com ¶
12 years ago
In reply to adrian,
Thank you very much for your function. There is a small issue with your relative protocol function. You need to remove the // when making the url the path. Here is the new function.
function resolve_url($base, $url) {
if (!strlen($base)) return $url;
// Step 2
if (!strlen($url)) return $base;
// Step 3
if (preg_match('!^[a-z]+:!i', $url)) return $url;
$base = parse_url($base);
if ($url{0} == "#") {
// Step 2 (fragment)
$base['fragment'] = substr($url, 1);
return unparse_url($base);
}
unset($base['fragment']);
unset($base['query']);
if (substr($url, 0, 2) == "//") {
// Step 4
return unparse_url(array(
'scheme'=>$base['scheme'],
'path'=>substr($url,2),
));
} else if ($url{0} == "/") {
// Step 5
$base['path'] = $url;
} else {
// Step 6
$path = explode('/', $base['path']);
$url_path = explode('/', $url);
// Step 6a: drop file from base
array_pop($path);
// Step 6b, 6c, 6e: append url while removing "." and ".." from
// the directory portion
$end = array_pop($url_path);
foreach ($url_path as $segment) {
if ($segment == '.') {
// skip
} else if ($segment == '..' && $path && $path[sizeof($path)-1] != '..') {
array_pop($path);
} else {
$path[] = $segment;
}
}
// Step 6d, 6f: remove "." and ".." from file portion
if ($end == '.') {
$path[] = '';
} else if ($end == '..' && $path && $path[sizeof($path)-1] != '..') {
$path[sizeof($path)-1] = '';
} else {
$path[] = $end;
}
// Step 6h
$base['path'] = join('/', $path);
}
// Step 7
return unparse_url($base);
}
christian at resource-it dot dk ¶
12 years ago
I searched for an implementation of rfc3986, which is a newer version of rfc 2392. I may find it here : <http://www.chrsen.dk/fundanemt/files/scripter/php/misc/rfc3986.php> - read the rfc at <http://rfc.net/rfc3986.html>
adrian-php at sixfingeredman dot net ¶
12 years ago
Here's a function which implements resolving a relative URL according to RFC 2396 section 5.2. No doubt there are more efficient implementations, but this one tries to remain close to the standard for clarity. It relies on a function called "unparse_url" to implement section 7, left as an exercise for the reader (or you can substitute the "glue_url" function posted earlier).
<?php
/**
* Resolve a URL relative to a base path. This happens to work with POSIX
* filenames as well. This is based on RFC 2396 section 5.2.
*/
function resolve_url($base, $url) {
if (!strlen($base)) return $url;
// Step 2
if (!strlen($url)) return $base;
// Step 3
if (preg_match('!^[a-z]+:!i', $url)) return $url;
$base = parse_url($base);
if ($url{0} == "#") {
// Step 2 (fragment)
$base['fragment'] = substr($url, 1);
return unparse_url($base);
}
unset($base['fragment']);
unset($base['query']);
if (substr($url, 0, 2) == "//") {
// Step 4
return unparse_url(array(
'scheme'=>$base['scheme'],
'path'=>$url,
));
} else if ($url{0} == "/") {
// Step 5
$base['path'] = $url;
} else {
// Step 6
$path = explode('/', $base['path']);
$url_path = explode('/', $url);
// Step 6a: drop file from base
array_pop($path);
// Step 6b, 6c, 6e: append url while removing "." and ".." from
// the directory portion
$end = array_pop($url_path);
foreach ($url_path as $segment) {
if ($segment == '.') {
// skip
} else if ($segment == '..' && $path && $path[sizeof($path)-1] != '..') {
array_pop($path);
} else {
$path[] = $segment;
}
}
// Step 6d, 6f: remove "." and ".." from file portion
if ($end == '.') {
$path[] = '';
} else if ($end == '..' && $path && $path[sizeof($path)-1] != '..') {
$path[sizeof($path)-1] = '';
} else {
$path[] = $end;
}
// Step 6h
$base['path'] = join('/', $path);
}
// Step 7
return unparse_url($base);
}
?>
Elliott Brueggeman ¶
12 years ago
Note that if you pass this function a url without a scheme (www.php.net, as opposed to http://www.php.net), the function will incorrectly parse the results. In my test case it returned the domain under the ['path'] element and nothing in the ['host'] element.
alistair at 21degrees dot com dot au ¶
12 years ago
Heres a simple function to add the $component option in for PHP4. Haven't done exhaustive testing, but should work ok.
<?php
## Defines only available in PHP 5, created for PHP4
if(!defined('PHP_URL_SCHEME')) define('PHP_URL_SCHEME', 1);
if(!defined('PHP_URL_HOST')) define('PHP_URL_HOST', 2);
if(!defined('PHP_URL_PORT')) define('PHP_URL_PORT', 3);
if(!defined('PHP_URL_USER')) define('PHP_URL_USER', 4);
if(!defined('PHP_URL_PASS')) define('PHP_URL_PASS', 5);
if(!defined('PHP_URL_PATH')) define('PHP_URL_PATH', 6);
if(!defined('PHP_URL_QUERY')) define('PHP_URL_QUERY', 7);
if(!defined('PHP_URL_FRAGMENT')) define('PHP_URL_FRAGMENT', 8);
function parse_url_compat($url, $component=NULL){
if(!$component) return parse_url($url);
## PHP 5
if(phpversion() >= 5)
return parse_url($url, $component);
## PHP 4
$bits = parse_url($url);
switch($component){
case PHP_URL_SCHEME: return $bits['scheme'];
case PHP_URL_HOST: return $bits['host'];
case PHP_URL_PORT: return $bits['port'];
case PHP_URL_USER: return $bits['user'];
case PHP_URL_PASS: return $bits['pass'];
case PHP_URL_PATH: return $bits['path'];
case PHP_URL_QUERY: return $bits['query'];
case PHP_URL_FRAGMENT: return $bits['fragment'];
}
}
?>
Michael Muryn ¶
12 years ago
Another update to the glue_url function: applied the "isset" treatment to $parsed['pass'].
<?php
function glue_url($parsed)
{
if (!is_array($parsed)) return false;
$uri = isset($parsed['scheme']) ? $parsed['scheme'].':'.((strtolower($parsed['scheme']) == 'mailto') ? '' : '//') : '';
$uri .= isset($parsed['user']) ? $parsed['user'].(isset($parsed['pass']) ? ':'.$parsed['pass'] : '').'@' : '';
$uri .= isset($parsed['host']) ? $parsed['host'] : '';
$uri .= isset($parsed['port']) ? ':'.$parsed['port'] : '';
if(isset($parsed['path']))
{
$uri .= (substr($parsed['path'], 0, 1) == '/') ? $parsed['path'] : ('/'.$parsed['path']);
}
$uri .= isset($parsed['query']) ? '?'.$parsed['query'] : '';
$uri .= isset($parsed['fragment']) ? '#'.$parsed['fragment'] : '';
return $uri;
}
?>
gustavo dot andriuolo at vulcabras dot com dot ar ¶
8 years ago
Here's a method to get the REAL name of a domain. This return just the domain name, not the rest. First check if is not an IP, then return the name:
<?php
function esip($ip_addr)
{
//first of all the format of the ip address is matched
if(preg_match("/^(\d{1,3})\.(\d{1,3})\.(\d{1,3})\.(\d{1,3})$/",$ip_addr))
{
//now all the intger values are separated
$parts=explode(".",$ip_addr);
//now we need to check each part can range from 0-255
foreach($parts as $ip_parts)
{
if(intval($ip_parts)>255 || intval($ip_parts)<0)
return FALSE; //if number is not within range of 0-255
}
return TRUE;
}
else
return FALSE; //if format of ip address doesn't matches
}
function domain($domainb)
{
$bits = explode('/', $domainb);
if ($bits[0]=='http:' || $bits[0]=='https:')
{
$domainb= $bits[2];
} else {
$domainb= $bits[0];
}
unset($bits);
$bits = explode('.', $domainb);
$idz=count($bits);
$idz-=3;
if (strlen($bits[($idz+2)])==2) {
$url=$bits[$idz].'.'.$bits[($idz+1)].'.'.$bits[($idz+2)];
} else if (strlen($bits[($idz+2)])==0) {
$url=$bits[($idz)].'.'.$bits[($idz+1)];
} else {
$url=$bits[($idz+1)].'.'.$bits[($idz+2)];
}
return $url;
}
$address='clients1.sub3.google.co.uk';
$parsed_url = parse_url($address);
$check = esip($parsed_url['host']);
$host = $parsed_url['host'];
if ($check == FALSE){
if ($host != ""){
$host = domain($host);
}else{
$host = domain($address);
}
}
echo $host;
?>
This return: google.co.uk
'http://sub1.sub2.sub3.example.com:443';
return: example.com
'example.com';
return: example.com
Many times parse_url return nothing when domain is google.com only for example.
Now, google.com, or google.co.uk will return the same.
Maybe is a little dirty, but works well for me, i use it to group internet access log from squid.
Regards.
Simon D ¶
8 years ago
To get the params (url query) as Associative array, use this function:
<?php
/**
* Returns the url query as associative array
*
* @param string query
* @return array params
*/
function convertUrlQuery($query) {
$queryParts = explode('&', $query);
$params = array();
foreach ($queryParts as $param) {
$item = explode('=', $param);
$params[$item[0]] = $item[1];
}
return $params;
}
?>
jbr at ya-right dot com ¶
11 years ago
This function never works the way you think it should...
Example....
<?php
print_r ( parse_url ( 'me:you@sub.site.org/pear/validate.html?happy=me&sad=you#url' ) );
?>
Returns...
Array
(
[scheme] => me
[path] => you@sub.site.org/pear/validate.html
[query] => happy=me&sad=you
[fragment] => url
)
Here my way of doing parse_url
<?php
function parseUrl ( $url )
{
$r = '!(?:(\w+)://)?(?:(\w+)\:(\w+)@)?([^/:]+)?';
$r .= '(?:\:(\d*))?([^#?]+)?(?:\?([^#]+))?(?:#(.+$))?!i';
preg_match ( $r, $url, $out );
return $out;
}
print_r ( parseUrl ( 'me:you@sub.site.org/pear/validate.html?happy=me&sad=you#url' ) );
?>
Returns...
Array
(
[0] => me:you@sub.site.org/pear/validate.html?happy=me&sad=you#url
[1] =>
[2] => me
[3] => you
[4] => sub.site.org
[5] =>
[6] => /pear/validate.html
[7] => happy=me&sad=you
[8] => url
)
Where as...
out[0] = full url
out[1] = scheme or '' if no scheme was found
out[2] = username or '' if no auth username was found
out[3] = password or '' if no auth password was found
out[4] = domain name or '' if no domain name was found
out[5] = port number or '' if no port number was found
out[6] = path or '' if no path was found
out[7] = query or '' if no query was found
out[8] = fragment or '' if no fragment was found
mostafa at alfehrest dot org ¶
3 years ago
This function will attempt to parse relative URLs but relaying on it can produce unexpected behavior that can cause some hard to track bugs. (The following results are obtained from PHP 5.5.19)
Attempting to parse a url like this
http://example.com/entities/GOA:98/?search=8989157d1f22
Correctly produces
<?php
array (
'scheme' => 'http',
'host' => 'example.com',
'path' => '/entities/GOA:98/',
'query' => 'search=8989157d1f22',
);
?>
However, Attempting to parse the relative URL
entities/GOA:98/?search=8989157d1f22
<?php
array (
'host' => 'entities',
'port' => 98,
'path' => '/GOA:98/',
'query' => 'search=8989157d1f22',
)
?>
If I change :98 to :A98 parse_url parses the URL correctly as
<?php
array (
'path' => 'entities/GOA:A98/',
'query' => 'search=8989157d1f22',
)
?>
Bottom line, Avoid using parse_url for relative urls unless you have tested the expected input and you know parse_url will handle them well.
bahtiar at gadimov dot de ¶
8 years ago
Hi,
if you have problems with UTF8 encoded urls please see http://bugs.php.net/bug.php?id=52923 . parse_url breaks the utf8. :( You have to implement it yourself.
martin at planio dot com ¶
9 years ago
For those of you sending URLs in HTML emails with a redirect address in the query string, note that Hotmail unescapes / and : characters in the query string. So that breaks the parse_url() function call. Take this as an example:
href="http://example.com/redirect?url=http%3A%2F%2Fplanio.com"
Hotmail will transform it to this:
href="http://example.com/redirect?url=http://planio.com"
The solution is to be preventive before the call to parse_url():
<?php
$q_index = strpos($uri, '?');
if ($q_index !== FALSE &&
(strpos($uri, ':', $q_index) !== FALSE || strpos($uri, '/', $q_index) !== FALSE)) {
$begin = substr($uri, 0, $q_index);
$end = substr($uri, $q_index, strlen($uri)-$q_index);
$end = str_replace('/', '%2F', $end);
$end = str_replace(':', '%3A', $end);
$uri = $begin.$end;
}
?>
webmaster at bigbirdmedia dot com ¶
5 years ago
A simple function using "parse_url" to find the base URL of the given link.
<?php
function getPrimaryDomain($url) {
$tld = parse_url($url,PHP_URL_HOST);
$tldArray = explode(".",$tld);
// COUNTS THE POSITION IN THE ARRAY TO IDENTIFY THE TOP LEVEL DOMAIN (TLD)
$l1 = '0';
foreach($tldArray as $s) {
// CHECKS THE POSITION IN THE ARRAY TO SEE IF IT MATCHES ANY OF THE KNOWN TOP LEVEL DOMAINS (YOU CAN ADD TO THIS LIST)
if($s == 'com' || $s == 'net' || $s == 'info' || $s == 'biz' || $s == 'us' || $s == 'co' || $s == 'org' || $s == 'me') {
// CALCULATES THE SECOND LEVEL DOMAIN POSITION IN THE ARRAY ONCE THE POSITION OF THE TOP LEVEL DOMAIN IS IDENTIFIED
$l2 = $l1 - 1;
}
else {
// INCREMENTS THE COUNTER FOR THE TOP LEVEL DOMAIN POSITION IF NO MATCH IS FOUND
$l1++;
}
}
// RETURN THE SECOND LEVEL DOMAIN AND THE TOP LEVEL DOMAIN IN THE FORMAT LIKE "SOMEDOMAIN.COM"
echo $tldArray[$l2] . '.' . $tldArray[$l1];
}
// CALL THE FUNCTION - THIS EXAMPLE RETURNS "BITLY.COM"
getPrimaryDomain('http://www.enterprise.bitly.com/?utm_source=homepage);
?>
Egor Chernodarov ¶
8 years ago
Noticed the following differences in error handling:
<?php
print_r(parse_url('ftp://user:password@host:port'));
?>
In PHP 5.2.6 returns:
Array
(
[scheme] => ftp
[host] => host
[user] => user
[pass] => password
)
port is just skipped.
But in PHP 5.3.6 returns NULL without any warnings.
gautam at rogers dot com ¶
10 years ago
What about using something like this to safely encoding all the values that are passed in the query portion?
Example input:
http://www.example.com/?first=john&last=smith&email=john@smith.com
Result:
http://www.example.com/?first=john&last=smith&email=john%40smith.com
<?php
function safe_url($url) {
// Make sure we have a string to work with
if(!empty($url)) {
// Explode into URL keys
$urllist=parse_url($url);
// Make sure we have a valid result set and a query field
if(is_array($urllist) && isset($urllist["query"])) {
// Explode into key/value array
$keyvalue_list=explode("&",($urllist["query"]));
// Store resulting key/value pairs
$keyvalue_result=array();
foreach($keyvalue_list as $key=>$value) {
// Explode each individual key/value into an array
$keyvalue=explode("=",$value);
// Make sure we have a "key=value" array
if(count($keyvalue)==2) {
// Encode the value portion
$keyvalue[1]=urlencode($keyvalue[1]);
// Add our key and encoded value into the result
array_push($keyvalue_result,implode("=",$keyvalue));
}
}
// Repopulate our query key with encoded results
$urllist["query"]=implode("&",$keyvalue_result);
// Build the the final output URL
$url=(isset($urllist["scheme"])?$urllist["scheme"]."://":"").
(isset($urllist["user"])?$urllist["user"].":":"").
(isset($urllist["pass"])?$urllist["pass"]."@":"").
(isset($urllist["host"])?$urllist["host"]:"").
(isset($urllist["port"])?":".$urllist["port"]:"").
(isset($urllist["path"])?$urllist["path"]:"").
(isset($urllist["query"])?"?".$urllist["query"]:"").
(isset($urllist["fragment"])?"#".$urllist["fragment"]:"");
}
}
return $url;
}
?>
chris at ocproducts dot com ¶
10 months ago
If there is no port explicitly in the URL then it will not default to 80/443.
For example this...
parse_url('http://example.com', PHP_URL_PORT);
...returns null.
Anonymous ¶
1 year ago
This function will attempt to parse relative URLs but relaying on it can produce unexpected behavior that can cause some hard to track bugs. (The following results are obtained from PHP 5.5.19)
Attempting to parse a url like this
http://example.com/entities/GOA:98/?search=8989157d1f22
Correctly produces
<?php
array (
'scheme' => 'http',
'host' => 'example.com',
'path' => '/entities/GOA:98/',
'query' => 'search=8989157d1f22',
);
?>
However, Attempting to parse the relative URL
entities/GOA:98/?search=8989157d1f22
<?php
array (
'host' => 'entities',
'port' => 98,
'path' => '/GOA:98/',
'query' => 'search=8989157d1f22',
)
?>
If I change :98 to :A98 parse_url parses the URL correctly as
<?php
array (
'path' => 'entities/GOA:A98/',
'query' => 'search=8989157d1f22',
)
?>
https://hawacastle.com
mpyw ¶
2 years ago
Yet another URL builder implementation:
<?php
function build_url(array $elements)
{
$e = $elements;
return
(isset($e['host']) ? (
(isset($e['scheme']) ? "$e[scheme]://" : '//') .
(isset($e['user']) ? $e['user'] . (isset($e['pass']) ? ":$e[pass]" : '') . '@' : '') .
$e['host'] .
(isset($e['port']) ? ":$e[port]" : '')
) : '') .
(isset($e['path']) ? $e['path'] : '/') .
(isset($e['query']) ? '?' . (is_array($e['query']) ? http_build_query($e['query'], '', '&') : $e['query']) : '') .
(isset($e['fragment']) ? "#$e[fragment]" : '')
;
}
?>
For convenience, you can pass $elements['query'] as array.
Example:
<?php
$elements = [
"host" => "example.com",
"user" => "root",
"pass" => "stupid",
"path" => "/x/y/z",
"query" => [
"a" => "b",
"c" => "d",
],
];
echo build_url($elements);
?>
will output
//root:stupid@example.com/x/y/z?a=b&c=d
ivijan dot stefan at gmail dot com ¶
3 years ago
If you need check if URL exists or not, here is one my good function for that.
<?php
// Return false or URL
function url_exists($url='')
{
if(empty($url)) return false;
$curl = curl_init($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 ,5);
curl_setopt($curl, CURLOPT_TIMEOUT , 2);
//do request
$result = curl_exec($curl);
//if request did not fail
if ($result !== false) {
//if request was ok, check response code
$statusCode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
if ((int)$statusCode === 200) return $url;
return false;
}
curl_close($curl);
return false;
}
if(url_exists("http://www.google.com")!==false)
{
// URL Exists
}
?>
This can help if you decide to do some dynamic URL parser or something where need validations.
Nicolas Merlet - admin(at)merletn.org ¶
11 years ago
Please note that parse_url seems not to produce always the same results when passing non-standard urls.
Eg. I was using this code since 2005 (both under PHP 4.3.10 and PHP 5.2.3) :
<?php
$p = parse_url ( 'http://domain.tld/tcp://domain2.tld/dir/file' ) ;
$d2 = parse_url ( $p['path'] ) ;
echo $d2 ; // returns '/dir/file'
?>
Of course my example is very specific, as URL is not really correct. But using parse_url was a great trick to split URL easily (without using regular expressions).
Unfortunately under PHP 5.2.0-8 (+etch10), parse_url will fail as it does not accept the slash (/) at the beginning of URL.
Here is a possible patch :
<?php
$p = parse_url ( 'http://domain.tld/tcp://domain2.tld/dir/file' ) ;
$d2 = parse_url ( substr ( $p['path'] , 1 ) ) ;
echo $d2 ; // returns '/dir/file'
?>
However this last code is not optimized at all, and should be replaced by a regular expression to split URL (so that parse_url would be no longer used).
So you should use parse_url very carefully, and verify that you pass only standard URLs...
mprz1024 at gmail dot com ¶
3 years ago
So why on Earth does parse_url('file:1') work while parse_url('file:0') returns false?
