Im using a regex on PHP to convert an url to a domain like below
function getDomainFromUrl($url) {
$pieces = parse_url($url);
$domain = isset($pieces['host']) ? $pieces['host'] : '';
if (preg_match('/(?P<domain>[a-z0-9][a-z0-9\-]{1,63}\.[a-z\.]{2,6})$/i',$domain, $regs)) {
return $regs['domain'];
}
return false;
}
Now I want to get domain with its subdomain. What should I do on my regex?
Now:
http://subdomain.example.com -> returns to example.com
Expected:
subomain.example.com
Last but most important part for me:
if url has www. subdomain should be removed. I don't want to get www.
print get_domain("http://subomain.example.com"); // outputs 'example.com'
function get_domain($url)
{
$pieces = parse_url($url);
$domain = isset($pieces['host']) ? $pieces['host'] : '';
if (preg_match('/(?P<domain>[a-z0-9][a-z0-9\-]{1,63}\.[a-z\.]{2,6})$/i', $domain, $regs)) {
return $regs['domain'];
}
return false;
}
How about this?
function getDomainFromUrl($url) {
if (!filter_var($url, FILTER_VALIDATE_URL)) {
$url = 'http://' . $url;
}
$host = parse_url($url, PHP_URL_HOST);
return preg_replace('/^www\./', '', $host);
}
I have been trying to get the first subdirectory of a URL using all kinds of string manipulation functions and have been having a lot of trouble. I was wondering if anyone knew of an easy way to accomplish this?
I appreciate any advice, thanks in advance!
http://www.domain.com/pages/images/apple.png //output: pages
www.domain.com/pages/b/c/images/car.png // output: pages
domain.com/one/apple.png // output: one
You can use php function parse_url();
$url = 'domain.com/one/apple.png';
$path = parse_url($url, PHP_URL_PATH);
$firstSubDir = explode('/', $path)[1]; // [0] is the domain [1] is the first subdirectory, etc.
echo $firstSubDir; //one
function startsWith($haystack, $needle)
{
return $needle === "" || strpos($haystack, $needle) === 0;
}
$url = "http://www.domain.com/pages/images/apple.png";
$urlArr = explode('/', $url);
echo (startsWith($url, 'http')) ? $urlArr[3] : $urlArr[1]; // Should echo 'pages'
The above should work on both with and without 'http' as url-prefix case.
An alternative function to get first path from URL (with or without scheme).
function domainpath($url = '')
{
$url = preg_match("#^https?://#", $url) ? $url : 'http://' . $url;
$url = parse_url($url);
$explode = explode('/', $url['path']);
return $explode[1];
}
echo domainpath('http://www.domain.com/pages/images/apple.png');
echo domainpath('https://domain.com/pages/images/apple.png');
echo domainpath('www.domain.com/pages/b/c/images/car.png');
echo domainpath('domain.com/one/apple.png');
This is probably simple however I am not the best with expressions..
I am trying to get the following string from..
http://www.yoursite.com/offers/838?&SITEID=2172
to this.. using an expression that will remove the ?&SITEID and the dynamic id which will vary
http://www.yoursite.com/offers/838
Can anyone suggest the best/simplest method to do this?
Check this function:
$str = 'http://www.yoursite.com/offers/838?&SITEID=2172';
function remove_query_arg($var, $url = NULL){
if(!$url){
$url = $_SERVER['REQUEST_URI'];
}
$parsed_url = parse_url($url);
$query_vars = explode('&', $parsed_url['query']);
foreach($query_vars as $key => $value){
$query_vars[$key] = explode('=', $query_vars[$key]);
$query_variables[$query_vars[$key][0]] = $query_vars[$key][1];
}
if(is_array($var)){
foreach($var as $value){
unset($query_variables[$value]);
}
}
elseif(is_string($var)){
unset($query_variables[$var]);
}
$query_vars = array();
foreach($query_variables as $key => $value){
$query_vars[] = $key.($value !== NULL || !empty($value) ? '='.$value : '');
}
$query_str = '';
$query_str = implode('&',$query_vars);
return (isset($parsed_url['scheme']) && !empty($parsed_url['scheme']) ? $parsed_url['scheme'].'://' : '').$parsed_url['host'].(isset($parsed_url['path']) && !empty($parsed_url['path']) ? $parsed_url['path'] : '').(!empty($query_str) ? '?'.$query_str : '');
}
echo remove_query_arg('SITEID', $str);
This is a URL, so parse it as one, with parse_url().
$url = "http://www.yoursite.com/offers/838?&SITEID=2172";
$parts = parse_url($url);
$url = $parts["scheme"] . "://" . $parts["host"] . $parts["path"];
Using explode function returns an array
$url=http://www.yoursite.com/offers/838?&SITEID=2172
$result=explode('?',$url)
print_r($result);
output
array
{
[0]=>http://www.yoursite.com/offers/838
[1]=>?&SITEID=2172
}
A valid URL only has one ? so you can just use explode to break it into 2 parts
$url = "http://www.yoursite.com/offers/838?&SITEID=2172";
list($path, $query) = explode("?", $url, "2");
var_dump($path);
Output
string 'http://www.yoursite.com/offers/838' (length=34)
$url = "http://www.yoursite.com/offers/838?&SITEID=2172";
$str = substr($url, strpos($url, 0, "?&SITEID"));
// $str results in "http://www.yoursite.com/offers/838"
If you want to keep the part before the ? you can search
^(.+?)(\?&SITEID|$)
and replace with
$1
You search non greedily from the beginning of the line ^ to the first ?&SITEID and leave out the rest. If no ?&SITEID is found you get the entire line by arriving at the end of the string with $
| is the OR operator that tells the regex "Stop at the first ?&SITEID or at the end of the string"
EDIT:
After the comment where you explain your need to keep the rest of the querystring I suggest you a different approach: find
&?SITEID=[^&\s]+
being
&? an optional & at the beginning of the string
SITEID= the string you are looking for followed by
[^&\s]+ any number of non&, nonspace character
and remove it from the string. However, being this the case, I'd go with a non-regex, url-specific approach like suggested in the other answers.
I have some links in a Powerpoint presentation, and for some reason, when those links get clicked, it adds a return parameter to the URL. Well, that return parameter is causing my Joomla site's MVC pattern to get bungled.
What's an efficient way to strip off this return parameter using PHP?
Example:
http://mydomain.example/index.php?id=115&Itemid=283&return=aHR0cDovL2NvbW11bml0
The safest "correct" method would be:
Parse the url into an array with parse_url()
Extract the query portion, decompose that into an array using parse_str()
Delete the query parameters you want by unset() them from the array
Rebuild the original url using http_build_query()
Quick and dirty is to use a string search/replace and/or regex to kill off the value.
In a different thread Justin suggests that the fastest way is to use strtok()
$url = strtok($url, '?');
See his full answer with speed tests as well here: https://stackoverflow.com/a/1251650/452515
This is to complement Marc B's answer with an example, while it may look quite long, it's a safe way to remove a parameter. In this example we remove page_number
<?php
$x = 'http://url.example/search/?location=london&page_number=1';
$parsed = parse_url($x);
$query = $parsed['query'];
parse_str($query, $params);
unset($params['page_number']);
$string = http_build_query($params);
var_dump($string);
function removeParam($url, $param) {
$url = preg_replace('/(&|\?)'.preg_quote($param).'=[^&]*$/', '', $url);
$url = preg_replace('/(&|\?)'.preg_quote($param).'=[^&]*&/', '$1', $url);
return $url;
}
parse_str($queryString, $vars);
unset($vars['return']);
$queryString = http_build_query($vars);
parse_str parses a query string, http_build_query creates a query string.
Procedural Implementation of Marc B's Answer after refining Sergey Telshevsky's Answer.
function strip_param_from_url($url, $param)
{
$base_url = strtok($url, '?'); // Get the base URL
$parsed_url = parse_url($url); // Parse it
// Add missing {
if(array_key_exists('query',$parsed_url)) { // Only execute if there are parameters
$query = $parsed_url['query']; // Get the query string
parse_str($query, $parameters); // Convert Parameters into array
unset($parameters[$param]); // Delete the one you want
$new_query = http_build_query($parameters); // Rebuilt query string
$url =$base_url.'?'.$new_query; // Finally URL is ready
}
return $url;
}
// Usage
echo strip_param_from_url( 'http://url.example/search/?location=london&page_number=1', 'location' )
You could do a preg_replace like:
$new_url = preg_replace('/&?return=[^&]*/', '', $old_url);
Here is the actual code for what's described above as the "the safest 'correct' method"...
function reduce_query($uri = '') {
$kill_params = array('gclid');
$uri_array = parse_url($uri);
if (isset($uri_array['query'])) {
// Do the chopping.
$params = array();
foreach (explode('&', $uri_array['query']) as $param) {
$item = explode('=', $param);
if (!in_array($item[0], $kill_params)) {
$params[$item[0]] = isset($item[1]) ? $item[1] : '';
}
}
// Sort the parameter array to maximize cache hits.
ksort($params);
// Build new URL (no hosts, domains, or fragments involved).
$new_uri = '';
if ($uri_array['path']) {
$new_uri = $uri_array['path'];
}
if (count($params) > 0) {
// Wish there was a more elegant option.
$new_uri .= '?' . urldecode(http_build_query($params));
}
return $new_uri;
}
return $uri;
}
$_SERVER['REQUEST_URI'] = reduce_query($_SERVER['REQUEST_URI']);
However, since this will likely exist prior to the bootstrap of your application, you should probably put it into an anonymous function. Like this...
call_user_func(function($uri) {
$kill_params = array('gclid');
$uri_array = parse_url($uri);
if (isset($uri_array['query'])) {
// Do the chopping.
$params = array();
foreach (explode('&', $uri_array['query']) as $param) {
$item = explode('=', $param);
if (!in_array($item[0], $kill_params)) {
$params[$item[0]] = isset($item[1]) ? $item[1] : '';
}
}
// Sort the parameter array to maximize cache hits.
ksort($params);
// Build new URL (no hosts, domains, or fragments involved).
$new_uri = '';
if ($uri_array['path']) {
$new_uri = $uri_array['path'];
}
if (count($params) > 0) {
// Wish there was a more elegant option.
$new_uri .= '?' . urldecode(http_build_query($params));
}
// Update server variable.
$_SERVER['REQUEST_URI'] = $new_uri;
}
}, $_SERVER['REQUEST_URI']);
NOTE: Updated with urldecode() to avoid double encoding via http_build_query() function.
NOTE: Updated with ksort() to allow params with no value without an error.
This one of many ways, not tested, but should work.
$link = 'http://mydomain.example/index.php?id=115&Itemid=283&return=aHR0cDovL2NvbW11bml0';
$linkParts = explode('&return=', $link);
$link = $linkParts[0];
Wow, there are a lot of examples here. I am providing one that does some error handling. It rebuilds and returns the entire URL with the query-string-param-to-be-removed, removed. It also provides a bonus function that builds the current URL on the fly. Tested, works!
Credit to Mark B for the steps. This is a complete solution to tpow's "strip off this return parameter" original question -- might be handy for beginners, trying to avoid PHP gotchas. :-)
<?php
function currenturl_without_queryparam( $queryparamkey ) {
$current_url = current_url();
$parsed_url = parse_url( $current_url );
if( array_key_exists( 'query', $parsed_url )) {
$query_portion = $parsed_url['query'];
} else {
return $current_url;
}
parse_str( $query_portion, $query_array );
if( array_key_exists( $queryparamkey , $query_array ) ) {
unset( $query_array[$queryparamkey] );
$q = ( count( $query_array ) === 0 ) ? '' : '?';
return $parsed_url['scheme'] . '://' . $parsed_url['host'] . $parsed_url['path'] . $q . http_build_query( $query_array );
} else {
return $current_url;
}
}
function current_url() {
$current_url = 'http' . (isset($_SERVER['HTTPS']) ? 's' : '') . '://' . "{$_SERVER['HTTP_HOST']}{$_SERVER['REQUEST_URI']}";
return $current_url;
}
echo currenturl_without_queryparam( 'key' );
?>
$var = preg_replace( "/return=[^&]+/", "", $var );
$var = preg_replace( "/&{2,}/", "&", $var );
Second line will just replace && to &
very simple
$link = "http://example.com/index.php?id=115&Itemid=283&return=aHR0cDovL2NvbW11bml0"
echo substr($link, 0, strpos($link, "return") - 1);
//output : http://example.com/index.php?id=115&Itemid=283
#MarcB mentioned that it is dirty to use regex to remove an url parameter. And yes it is, because it's not as easy as it looks:
$urls = array(
'example.com/?foo=bar',
'example.com/?bar=foo&foo=bar',
'example.com/?foo=bar&bar=foo',
);
echo 'Original' . PHP_EOL;
foreach ($urls as $url) {
echo $url . PHP_EOL;
}
echo PHP_EOL . '#AaronHathaway' . PHP_EOL;
foreach ($urls as $url) {
echo preg_replace('#&?foo=[^&]*#', null, $url) . PHP_EOL;
}
echo PHP_EOL . '#SergeS' . PHP_EOL;
foreach ($urls as $url) {
echo preg_replace( "/&{2,}/", "&", preg_replace( "/foo=[^&]+/", "", $url)) . PHP_EOL;
}
echo PHP_EOL . '#Justin' . PHP_EOL;
foreach ($urls as $url) {
echo preg_replace('/([?&])foo=[^&]+(&|$)/', '$1', $url) . PHP_EOL;
}
echo PHP_EOL . '#kraftb' . PHP_EOL;
foreach ($urls as $url) {
echo preg_replace('/(&|\?)foo=[^&]*&/', '$1', preg_replace('/(&|\?)foo=[^&]*$/', '', $url)) . PHP_EOL;
}
echo PHP_EOL . 'My version' . PHP_EOL;
foreach ($urls as $url) {
echo str_replace('/&', '/?', preg_replace('#[&?]foo=[^&]*#', null, $url)) . PHP_EOL;
}
returns:
Original
example.com/?foo=bar
example.com/?bar=foo&foo=bar
example.com/?foo=bar&bar=foo
#AaronHathaway
example.com/?
example.com/?bar=foo
example.com/?&bar=foo
#SergeS
example.com/?
example.com/?bar=foo&
example.com/?&bar=foo
#Justin
example.com/?
example.com/?bar=foo&
example.com/?bar=foo
#kraftb
example.com/
example.com/?bar=foo
example.com/?bar=foo
My version
example.com/
example.com/?bar=foo
example.com/?bar=foo
As you can see only #kraftb posted a correct answer using regex and my version is a little bit smaller.
Remove Get Parameters From Current Page
<?php
$url_dir=$_SERVER['REQUEST_URI'];
$url_dir_no_get_param= explode("?",$url_dir)[0];
echo $_SERVER['HTTP_HOST'].$url_dir_no_get_param;
This should do it:
public function removeQueryParam(string $url, string $param): string
{
$parsedUrl = parse_url($url);
if (isset($parsedUrl[$param])) {
$baseUrl = strtok($url, '?');
parse_str(parse_url($url)['query'], $query);
unset($query[$param]);
return sprintf('%s?%s',
$baseUrl,
http_build_query($query)
);
}
return $url;
}
Simple solution that will work for every url
With this solution $url format or parameter position doesn't matter, as an example I added another parameter and anchor at the end of $url:
https://example.com/index.php?id=115&Itemid=283&return=aHR0cDovL2NvbW11bml0&bonus=test#test2
Here is the simple solution:
$url = 'https://example.com/index.php?id=115&Itemid=283&return=aHR0cDovL2NvbW11bml0&bonus=test#test2';
$url_query_stirng = parse_url($url, PHP_URL_QUERY);
parse_str( $url_query_stirng, $url_parsed_query );
unset($url_parsed_query['return']);
$url = str_replace( $url_query_stirng, http_build_query( $url_parsed_query ), $url );
echo $url;
Final result for $url string is:
https://example.com/index.php?id=115&Itemid=283&bonus=test#test2
Some of the examples posted are so extensive. This is what I use on my projects.
function removeQueryParameter($url, $param){
list($baseUrl, $urlQuery) = explode('?', $url, 2);
parse_str($urlQuery, $urlQueryArr);
unset($urlQueryArr[$param]);
if(count($urlQueryArr))
return $baseUrl.'?'.http_build_query($urlQueryArr);
else
return $baseUrl;
}
function remove_attribute($url,$attribute)
{
$url=explode('?',$url);
$new_parameters=false;
if(isset($url[1]))
{
$params=explode('&',$url[1]);
$new_parameters=ra($params,$attribute);
}
$construct_parameters=($new_parameters && $new_parameters!='' ) ? ('?'.$new_parameters):'';
return $new_url=$url[0].$construct_parameters;
}
function ra($params,$attr)
{ $attr=$attr.'=';
$new_params=array();
for($i=0;$i<count($params);$i++)
{
$pos=strpos($params[$i],$attr);
if($pos===false)
$new_params[]=$params[$i];
}
if(count($new_params)>0)
return implode('&',$new_params);
else
return false;
}
//just copy the above code and just call this function like this to get new url without particular parameter
echo remove_attribute($url,'delete_params'); // gives new url without that parameter
I know this is an old question but if you only want to remove one or few named url parameter you can use this function:
function RemoveGet_Regex($variable, $rewritten_url): string {
$rewritten_url = preg_replace("/(\?)$/", "", preg_replace("/\?&/", "?", preg_replace("/((?<=\?)|&){$variable}=[\w]*/i", "", $rewritten_url)));
return $rewritten_url;
}
function RemoveGet($name): void {
$rewritten_url = "https://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";
if(is_array($name)) {
for($i = 0; $i < count($name); $i++) {
$rewritten_url = RemoveGet_Regex($name[$i], $rewritten_url);
$is_set[] = isset($_GET[$name[$i]]);
}
$array_filtered = array_filter($is_set);
if (!empty($array_filtered)) {
header("Location: ".$rewritten_url);
}
}
else {
$rewritten_url = RemoveGet_Regex($name, $rewritten_url);
if(isset($_GET[$name])) {
header("Location: ".$rewritten_url);
}
}
}
In the first function preg_replace("/((?<=\?)|&){$variable}=[\w]*/i", "", $rewritten_url) will remove the get parameter, and the others will tidy it up. The second function will then redirect.
RemoveGet("id"); will remove the id=whatever from the url. The function can also work with arrays. For your example,
Remove(array("id","Item","return"));
To strip any parameter from the url using PHP script you need to follow this script:
function getNewArray($array,$k){
$dataArray = $array;
unset($array[$k]);
$dataArray = $array;
return $dataArray;
}
function getFullURL(){
return (isset($_SERVER['HTTPS']) && $_SERVER['HTTPS'] === 'on' ? "https" : "http") . "://$_SERVER[HTTP_HOST]$_SERVER[REQUEST_URI]";
}
$url = getFullURL();
$url_components = parse_url($url);
// Use parse_str() function to parse the
// string passed via URL
parse_str($url_components['query'], $params);
print_r($params);
<ul>
<?php foreach($params as $k=>$v){?>
<?php
$newArray = getNewArray($params,$k);
$parameters = http_build_query($newArray);
$newURL = $_SERVER['PHP_SELF']."?".$parameters;
?>
<li><?=$v;?> X
<?php }?>
</ul>
here is functions optimized for speed. But this functions DO NOT remove arrays like a[]=x&a[1]bb=y&a[2]=z by array name.
function removeQueryParam($query, $param)
{
$quoted_param = preg_quote($param, '/');
$pattern = "/(^$quoted_param=[^&]*&?)|(&$quoted_param=[^&]*)/";
return preg_replace($pattern, '', $query);
}
function removeQueryParams($query, array $params)
{
if ($params)
{
$pattern = '/';
foreach ($params as $param)
{
$quoted_param = preg_quote($param, '/');
$pattern .= "(^$quoted_param=[^&]*&?)|(&$quoted_param=[^&]*)|";
}
$pattern[-1] = '/';
return preg_replace($pattern, '', $query);
}
return $query;
}
<? if(isset($_GET['i'])){unset($_GET['i']); header('location:/');} ?>
This will remove the 'i' parameter from the URL. Change the 'i's to whatever you need.