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(PHP 4, PHP 5)
parse_url — Analysiert einen URL und gibt seine Bestandteile zurück
Diese Funktion parst einen URL und gibt ein assoziatives Array zurück, das die im URL vorhandenen Komponenten enthält.
Diese Funktion ist nicht dazu gedacht, einen gegebenen URL zu validieren, sondern es gliedert einen URL in die unten aufgeführten Bestandteile. Unvollständige URLs werden als Parameter akzeptiert, parse_url() versucht, sie bestmöglich zu analysieren.
Der zu parsende URL. Ungültige Zeichen werden durch _ ersetzt.
Geben Sie einen der folgenden Parameter an, um nur einen spezifischen Teil des URL als String zu erhalten: PHP_URL_SCHEME, PHP_URL_HOST, PHP_URL_PORT, PHP_URL_USER, PHP_URL_PASS, PHP_URL_PATH, PHP_URL_QUERY oder PHP_URL_FRAGMENT.
Bei sehr fehlerhaften URLs kann parse_url() FALSE zurückgeben und wirft E_WARNING. Andernfalls wird ein assoziatives Array zurückgegeben, dessen Bestandteile sich wie folgt zusammensetzen können (mindestens ein Bestandteil liegt vor):
Ist der Parameter component angegeben, wird ein String anstelle des normalen Array zurückgegeben.
| Version | Beschreibung |
|---|---|
| 5.1.2 | component-Parameter hinzugefügt |
Beispiel #1 Ein parse_url()-Beispiel
<?php
$url = 'http://benutzername:passwort@hostname/pfad?argument=wert#textanker';
print_r(parse_url($url));
echo parse_url($url, PHP_URL_PATH);
?>
Das oben gezeigte Beispiel erzeugt folgende Ausgabe:
Array
(
[scheme] => http
[host] => hostname
[user] => benutzername
[pass] => passwort
[path] => /pfad
[query] => argument=wert
[fragment] => textanker
)
/pfad
Hinweis:
Diese Funktion verarbeitet keine relativen URLs.
Hinweis:
Die Funktion ist primär dazu gedacht, URLs zu parsen, nicht jedoch URIs. Um jedoch die Abwärtskompatibilität von PHP zu gewährleisten, wird für das Schema file:// die Ausnahme dreier Slashes (file:///) zugelassen. Bei allen anderen Schemata ist diese Notierung ungültig.
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.
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 = $host[0];
?>
@ solenoid: Your code was very helpful, but it fails when the current URL has no query string (it appends '&' instead of '?' before the query). Below is a fixed version that catches this edge case and corrects it.
<?php
function modify_url($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;
}
?>
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;
}
?>
If you want to get host, function will return NULL if you pass only host.
Example:
<?php
parse_url($url, PHP_URL_HOST);
?>
$url => value returned
http://example.com => string 'example.com' (length=11)
http://www.example.com =>string 'www.example.com' (length=15)
http://www.example.com:8080 => string 'www.example.com' (length=15)
example.com => null
www.example.com => null
example.com:8080 => string 'example.com' (length=11)
www.example.com:8080 => string 'www.example.com' (length=15)
Here's a piece of code that modifies, replaces or removes the url query. This can typically used in paging situations where there are more parameters than the page.
<?php
function modify_url($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'));
// $url = "http://www.example.com/page.php?p=4&show=column&style=23"
?>
I was writing unit tests and needed to cause this function to kick out an error and return FALSE in order to test a specific execution path. If anyone else needs to force a failure, the following inputs will work:
<?php
parse_url("http:///example.com");
parse_url("http://:80");
parse_url("http://user@:80");
?>
Thanks to xellisx for his parse_query function. I used it in one of my projects and it works well. But it has an error. I fixed the error and improved it a little bit. Here is my version of it:
<?php
// Originally written by xellisx
function parse_query($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']);
?>
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.
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);
}
}
?>
careful while use parse_str() function with full url.
see:
<?php
$sLink = "http://localhost/khm/search.php?act=result&q=a";
parse_str($sLink, $vars);
print_r($vars);
echo $sLink = rawurldecode(http_build_query($vars));
// will output:
// Array
// (
// [http://localhost/khm/search_php?act] => result
// [q] => a
// )
// http://localhost/khm/search_php?act=result&q=a
// search.php become search_php
?>
An update to the function by FredLudd at gmail dot com. I added IPv6 functionality as well.
<?php
function j_parseUrl($url) {
$r = "(?:([a-z0-9+-._]+)://)?";
$r .= "(?:";
$r .= "(?:((?:[a-z0-9-._~!$&'()*+,;=:]|%[0-9a-f]{2})*)@)?";
$r .= "(?:\[((?:[a-z0-9:])*)\])?";
$r .= "((?:[a-z0-9-._~!$&'()*+,;=]|%[0-9a-f]{2})*)";
$r .= "(?::(\d*))?";
$r .= "(/(?:[a-z0-9-._~!$&'()*+,;=:@/]|%[0-9a-f]{2})*)?";
$r .= "|";
$r .= "(/?";
$r .= "(?:[a-z0-9-._~!$&'()*+,;=:@]|%[0-9a-f]{2})+";
$r .= "(?:[a-z0-9-._~!$&'()*+,;=:@\/]|%[0-9a-f]{2})*";
$r .= ")?";
$r .= ")";
$r .= "(?:\?((?:[a-z0-9-._~!$&'()*+,;=:\/?@]|%[0-9a-f]{2})*))?";
$r .= "(?:#((?:[a-z0-9-._~!$&'()*+,;=:\/?@]|%[0-9a-f]{2})*))?";
preg_match("`$r`i", $url, $match);
$parts = array(
"scheme"=>'',
"userinfo"=>'',
"authority"=>'',
"host"=> '',
"port"=>'',
"path"=>'',
"query"=>'',
"fragment"=>'');
switch (count ($match)) {
case 10: $parts['fragment'] = $match[9];
case 9: $parts['query'] = $match[8];
case 8: $parts['path'] = $match[7];
case 7: $parts['path'] = $match[6] . $parts['path'];
case 6: $parts['port'] = $match[5];
case 5: $parts['host'] = $match[3]?"[".$match[3]."]":$match[4];
case 4: $parts['userinfo'] = $match[2];
case 3: $parts['scheme'] = $match[1];
}
$parts['authority'] = ($parts['userinfo']?$parts['userinfo']."@":"").
$parts['host'].
($parts['port']?":".$parts['port']:"");
return $parts;
}
?>
When using the url
/* line too long for this site's comment handler */
"foo://username:password@[2001:4860:0:2001::68]:8042".
"/over/there/index.dtb;type=animal?name=ferret#nose"
The original would return
Array
(
[scheme] => foo
[userinfo] => username:password
[authority] => username:password@
[host] =>
[port] =>
[path] =>
[query] =>
[fragment] =>
)
The new one returns
Array
(
[scheme] => foo
[userinfo] => username:password
[authority] => username:password@[2001:4860:0:2001::68]:8042
[host] => [2001:4860:0:2001::68]
[port] => 8042
[path] => /over/there/index.dtb;type=animal
[query] => name=ferret
[fragment] => nose
)
All of the other examples FredLudd used below still work exactly the same.
Additional information:
if you like to compute a registered domain name of the parsed host name you can use the PHP library at http://www.dkim-reputation.org/regdom-libs/
It relies on the effective TLD list of the Mozilla Foundation.
Modification to the code from:
theoriginalmarksimpson at gmail dot com
Change:
$r .= "(?:(?P<login>\w+):(?P<pass>\w+)@)?";
Replace with:
$r .= "(?:(?P<login>\w+):?(?P<pass>\w+)?@)?";
This will cover the case the only username is present in the url:
http://username@subdomain.domain.com/index.php?arg1=test#anchor
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: '.$url;
}
?>
What about using something like this to safely encoding all the values that are passed in the query portion?
Example input:
http://www.example.com/?first=john&last=smith&email=john@smith.com
Result:
http://www.example.com/?first=john&last=smith&email=john%40smith.com
<?php
function safe_url($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 $url;
}
?>
Another shot at trying to find a better parser. I noticed that the laulibrius/theoriginalmarksimpson functions didn't quite handle the URL for the page they were displayed on. For my mirror, ca3, this is
http://ca3.php.net/manual/en/function.parse-url.php
Run it through the function and it parses to
scheme => http
login =>
pass =>
host => ca3.php.net
ip =>
subdomain => ca3
domain => php.
extension => net
port =>
path => /manual/en/function.parse
file => function.parse
that is, the file name gets a bit mangled
Rather than tweak the function's regular expression yet again, I opted to adapt a RegExp that served me well in Javascript:
function j_parseUrl($url) {
$r = "(?:([a-z0-9+-._]+)://)?";
$r .= "(?:";
$r .= "(?:((?:[a-z0-9-._~!$&'()*+,;=:]|%[0-9a-f]{2})*)@)?";
$r .= "((?:[a-z0-9-._~!$&'()*+,;=]|%[0-9a-f]{2})*)";
$r .= "(?::(\d*))?";
$r .= "(/(?:[a-z0-9-._~!$&'()*+,;=:@/]|%[0-9a-f]{2})*)?";
$r .= "|";
$r .= "(/?";
$r .= "(?:[a-z0-9-._~!$&'()*+,;=:@]|%[0-9a-f]{2})+";
$r .= "(?:[a-z0-9-._~!$&'()*+,;=:@\/]|%[0-9a-f]{2})*";
$r .= ")?";
$r .= ")";
$r .= "(?:\?((?:[a-z0-9-._~!$&'()*+,;=:\/?@]|%[0-9a-f]{2})*))?";
$r .= "(?:#((?:[a-z0-9-._~!$&'()*+,;=:\/?@]|%[0-9a-f]{2})*))?";
preg_match("`$r`i", $url, $match);
$parts = array(
"scheme"=>'',
"userinfo"=>'',
"authority"=>'',
"host"=> '',
"port"=>'',
"path"=>'',
"query"=>'',
"fragment"=>'');
switch (count ($match)) {
case 9: $parts['fragment'] = $match[8];
case 8: $parts['query'] = $match[7];
case 7: $parts['path'] = $match[6];
case 6: $parts['path'] = $match[5] . $parts['path'];
case 5: $parts['port'] = $match[4];
case 4: $parts['host'] = $match[3];
case 3: $parts['userinfo'] = $match[2];
case 2: $parts['scheme'] = $match[1];
}
$parts['authority'] = ($parts['userinfo']?$parts['userinfo']."@":"").
$parts['host'].
($parts['port']?":".$parts['port']:"");
return $parts;
}
This function, when fed "http://ca3.php.net/manual/en/function.parse-url.php", returns
scheme => http
userinfo =>
authority => ca3.php.net
host => ca3.php.net
port =>
path => /manual/en/function.parse-url.php
query =>
fragment =>
which is somewhat closer to my needs.
But everything should be tested against the two examples provided by RFC3986,
/* line too long for this site's commnet handler */
"foo://username:password@example.com:8042".
"/over/there/index.dtb;type=animal?name=ferret#nose"
and
"urn:example:animal:ferret:nose"
Here the native function parse_url() performs admirably on that "urn:" example. Mine fails to pick out the path ("example:animal:ferret:nose") and the laulibrius/theoriginalmarksimpson function can't decipher anything there. On the "foo:" example, both my function and parse_url() get it right, while the other examples on this page don't.
The laulibrius/theoriginalmarksimpson function delivers
scheme => foo
login => username
pass => password
host => example.com
ip =>
subdomain =>
domain => example.
extension => com
port => 8042
path => /over/there/index.dtb
file => index.dtb
As you can see, the query string ("name=ferret") and fragment ("nose") have dropped off, as well as the parameter ("type=animal").
I need to parse out the query string from the referrer, so I created this function.
<?php
function parse_query($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 $arr;
}
?>
Here is an update to the glue_url() function.
It can now handle relative URLs if only 'path' is provided.
<?php
function glue_url($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) == '/') ?
$parsed['path'] : ((!empty($uri) ? '/' : '' ) . $parsed['path']);
}
$uri .= isset($parsed['query']) ? '?'.$parsed['query'] : '';
$uri .= isset($parsed['fragment']) ? '#'.$parsed['fragment'] : '';
return $uri;
}
?>
URL's in the query string of a relative URL will cause a problem
fails:
/page.php?foo=bar&url=http://www.example.com
parses:
http://www.foo.com/page.php?foo=bar&url=http://www.example.com
A rehash of code modified by "laulibrius at hotmail dot com".
This also parses urls for hosts that don't have a domain name and just use an IP as the hostname.
The old code would assume that the IP octets were a subdomain.
So the url "http://255.255.255.255/" would return 255.255 as a subdomain of 255.255.
<?php
parseUrl($url)
{
$r = "^(?:(?P<scheme>\w+)://)?";
$r .= "(?:(?P<login>\w+):(?P<pass>\w+)@)?";
$ip="(?:[0-9]{1,3}+\.){3}+[0-9]{1,3}";//ip check
$s="(?P<subdomain>[-\w\.]+)\.)?";//subdomain
$d="(?P<domain>[-\w]+\.)";//domain
$e="(?P<extension>\w+)";//extension
$r.="(?P<host>(?(?=".$ip.")(?P<ip>".$ip.")|(?:".$s.$d.$e."))";
$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);
}
?>
If you need to validate the host IP this is easier than using regex.
<?php
$parsed=parseUrl($url);
if($parsed['ip']) {
if(long2ip(ip2long($parsed['ip']))==$parsed['ip']){//validates IP
echo $parsed['ip']." is a valid host";
}
else {
echo $parsed['ip']." is not a valid host";
}
}
?>
my function catch the url written on the browser by the user and does the same thing of parse_url. but better, I think. I don't like parse_url because it says nothing about elements that it doesn't find in the url. my function instead return an empty string.
<?php
function get_url()
{
$arr = array();
$uri = $_SERVER['REQUEST_URI'];
// query
$x = array_pad( explode( '?', $uri ), 2, false );
$arr['query'] = ( $x[1] )? $x[1] : '' ;
// resource
$x = array_pad( explode( '/', $x[0] ), 2, false );
$x_last = array_pop( $x );
if( strpos( $x_last, '.' ) === false )
{
$arr['resource'] = '';
$x[] = $x_last;
}
else
{
$arr['resource'] = $x_last;
}
// path
$arr['path'] = implode( '/', $x );
if( substr( $arr['path'], -1 ) !== '/' ) $arr['path'] .= '/';
// domain
$arr['domain'] = $_SERVER['SERVER_NAME'];
// scheme
$server_prt = explode( '/', $_SERVER['SERVER_PROTOCOL'] );
$arr['scheme'] = strtolower( $server_prt[0] );
// url
$arr['url'] = $arr['scheme'].'://'.$arr['domain'].$uri;
return $arr;
}
?>
PS: I found working with explode is faster than using preg_match (I tryed with getmicrotime function and 'for' cycles).
PPS: I used array_pad to prevent any notice.
Here's the easiest way to get the URL to the path that your script is in (so not the actual script name itself, just the complete URL to the folder it's in)
echo "http://".$_SERVER['HTTP_HOST'].dirname($_SERVER['PHP_SELF']);
based on the "laulibrius at hotmail dot com" function, this work for relatives url only:
<?php
function parseUrl($url) {
$r = "^(?:(?P<path>[\.\w/]*/)?";
$r .= "(?P<file>\w+(?:\.\w+)?)?)\.(?P<extension>\w+)?";
$r .= "(?:\?(?P<arg>[\w=&]+))?";
$r .= "(?:#(?P<anchor>\w+))?";
$r = "!$r!";
preg_match ( $r, $url, $out );
return $out;
}
print_r(parseUrl("../test/f.aq.php?p=1&v=blabla#X1"));
?>
returns:
Array
(
[0] => ../test/faq.php?p=1&v=blabla#X1
[path] => ../test/
[1] => ../test/
[file] => faq
[2] => faq
[extension] => php
[3] => php
[arg] => p=1&v=blabla
[4] => p=1&v=blabla
[anchor] => X1
[5] => X1
)
There was one thing missing in the function dropped by "to1ne at hotmail dot com" when i tried it : domain and subdomain couldn't have a dash "-". So i add it in the regexp and the function looks like this now :
<?php
function parseUrl($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 $out;
}
?>
Btw, thanks for the function, it helps me a lot.
Based on the idea of "jbr at ya-right dot com" have I been working on a new function to parse the url:
<?php
function parseUrl($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...
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
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...
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.
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 $uri;
}
?>
an update to the glue url function.
you are able to put a host and a path without a slash at the beginning of the path
<?php
function glue_url($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 $uri;
}
?>
In reply to adrian,
Thank you very much for your function. There is a small issue with your relative protocol function. You need to remove the // when making the url the path. Here is the new function.
function resolve_url($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);
}
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>
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);
}
?>
Actually the behaviour noticed by the previous poster is quite correct. When the URI scheme is not present, it is plain wrong to assume that something starting with www. is a domain name, and that the scheme is HTTP. Internet Explorer does it that way, sure, but it does not make it any more correct. The documentation says that the function tries to decode the URL as well as it can, and the only sensible and standards-compliant way to decode such URL is to expect it to be a relative URI.
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.
Do not look for the fragment in $_SERVER['QUERY_STRING'], you will not find it. You should read the fragment in JavaScript for example.
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'];
}
}
?>
You may want to check out the PEAR NET_URL class. It provides easy means to manipulate URL strings.
http://pear.php.net/package/Net_URL
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