Is there a way I can strip out the variables from a link using PHP for example, if I have a link that reads http://localhost/link/index.php?s=30&p=3 how would I strip out ?s=30&p=3 so my link reads http://localhost/link/index.php
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9 Answers
list($url) = explode("?", $longUrl, 2);
1 Comment
scy won't contribute anymore
This seems to be the mother of all solutions to this questions. One line, not too slow and works even without a question mark present. Nice.
Edit (suggested by Hoohah):
Also you can use strstr() (PHP 5.3.0 onward):
echo strstr($longurl, "?", TRUE);
PHP has a built in function for this.
It is parse_url(). Take a look at the possible return values. In this case we can use scheme, host, and path.
For example:
<?php
$info = parse_url("http://localhost/link/index.php?s=30&p=3");
echo $info["scheme"] . "://" . $info["host"] . $info["path"];
// Output: http://localhost/link/index.php
?>
The advantage of this method over using explode() is that it gives you control over whether you want to show the username, password, and port if included. The code above will not show any of these, so http://user:pass@localhost:81/link/index.php?s=30&p=3 will return http://localhost/link/index.php, stripping the username, password, and port number, which is what I assume you'd want. Username, password, and port are available as $info["user"], $info["pass"], and $info["port"].
The explode() method fails if the password contains question marks. This method doesn't fail even with ? and @ signs in the password.
As a final note, if you are going to be dealing with port numbers, usernames, and passwords, you can use the code below (which has one added line) to strip usernames and passwords but keep port number:
<?php
$info = parse_url("http://user:__?**@@@@&?ss@localhost:80/link/index.php?s=30&p=3");
// If port is present add a colon before it, if not make it an empty string.
isset($info["port"]) ? $port = ":" . $info["port"] : $port ="";
echo $info["scheme"] . "://" . $info["host"] . $port . $info["path"];
// Outputs: http://localhost:80/link/index.php
?>
Finally, you really should not be using username and password in the link. From RFC2396
Some URL schemes use the format "user:password" in the userinfo field. This practice is NOT RECOMMENDED, because the passing of authentication information in clear text (such as URI) has proven to be a security risk in almost every case where it has been used.
8 Comments
scy won't contribute anymore
Ouch. Hurts that you had to write the first sentence in bold. A bit embarrassing that we forgot parse_url() exists. It is by far the cleanest solution, yes.
Artefacto
Example of it failing.
parse_url is not very adequate for this.
Peter Ajtai
@Artefact - That's not a fail; that's a win. Do you really want the
username and password included into HTML served???? This is exactly why parse_url is great. BTW if you want, you can include those when present.... just take a look at the possible return values.Artefacto
@Peter You can, but it's not so simple anymore. You have to check whether each one of those exist and then add them. And even if you ignore the username/password, you can't ignore the port. You have to add
. empty($info['port'])?":{$info['port']}":"" . .Artefacto
@Peter The password cannot question marks. Read RFC 2396. userinfo = *( unreserved | escaped | ";" | ":" | "&" | "=" | "+" | "$" | "," )
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Try this:
$pos = strpos($url, '?');
if($pos !== FALSE) {
$url = substr($url, 0, $pos);
}
1 Comment
Artefacto
Doesn't consider the case where
? doesn't appear. "If length is given and is 0, FALSE or NULL an empty string will be returned [from substr)."$url = 'http://localhost/link/index.php?s=30&p=3';
$d = explode("?", $url);
$stripped = reset($d);
4 Comments
scy won't contribute anymore
Three lines instead of one, and probably quite a bit slower than Jacob’s suggestion.
Aidan Kane
Does explode automatically delimit on '?' ? actually - you just seem to b using reset. oh, I see - I think that should read $stripped = reset($d);
Artefacto
@scy Jacob's solution doesn't work when there's no query string and these "3 lines" are actually two (one is an input definition) and could easily be 1 with trunk's array dereferencing.
Aidan Kane
Your answer still hasn't been updated as far as I can see. I prefer this method myself.
$fullUrl = "http://localhost/link/index.php?s=30&p=3#dontreplace";
$urlData = parse_url($fullUrl);
$url = str_replace('?'.$urlData['query'],'',$fullUrl);
This solution takes into account that you could have a hashtag after the paremeters and it does not replace it.
If you just don't care of what is after the ? then use the other answers
Comments
$url = strtok($url,"?");
answered Aug 12, 2010 at 20:01
Your Common Sense
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Comments
I haven't tested this but you could probably do something like:
$my_url = 'http://localhost/link/index.php?s=30&p=3';
$split = explode('?', $my_url);
$new_url = $split[0];
2 Comments
svens
Since when can you omit the
$ in php :) ?Aidan Kane
heh. oh yeah, oops. don't write much php anymore. I've updated so as to not cause confusion. thanks.
parse_url('http://localhost/link/index.php?s=30&p=3',PHP_URL_PATH);
1 Comment
Artefacto
This doesn't work (PARSE_URL_PATH is not even a constant, and if PHP_URL_PATH was used it would only give the path portion), but somehow it got upvoted twice.
If U need to parse the requested url, U can simply take it from globals:
// http://localhost/foo/bar?foo=bar&Foo1=Bar1
var_dump($_SERVER['QUERY_STRING']); // string(17) "foo=bar&Foo1=Bar1"
If symfony/http-foundation component is used, U can get query string from its Request class as follows:
$request = \Symfony\Component\HttpFoundation\Request::createFromGlobals();
$queryString = $request->getQueryString();
