Extract data from URL

[wploh67]

How do i extract the domain name and query string (id=12345) from a given URL?

 

For example, http://www.bookshop.com/book/en/catalog.php?id=12345

 

Thanks.

 

Regards,

WP

[huhn_m]

the query string you get with the variables $_REQUEST[$what] where what is the variable to request (here "id")

[uniflare]

barand gave me this answer after i gave him a preg_match expression that did the same.

 

Quote from Barand:

<?php
$a = parse_url('http://sub.domain.tld:8080/foldera/folderb/index.php?request=value');
echo '<pre>', print_r($a, true), '</pre>';

?>

---

 

just for ref my preg_match is:

 

its a regex with preg_match that will store all parts of a domain name into an array, eg:

 

http://sub.domain.tld:8080/foldera/folderb/index.php?request=value

 

will return:

 

Array(

[ 0] => "http"

[ 1] => "sub.domain.tld"

[ 2] => "8080"

[ 3] => "/foldera/folderb/"

[ 4] => "index.php"

[ 5] => "?request=value"

)

 

-----------

Now the function that does this: (The above noted output is stored in $matches2 variable)

 

preg_match('/\A(http:\/\/|https:\/\/)*([a-zA-Z0-9_\-\.]+):*([0-9]+)*\/*([a-zA-Z0-9_\-\.]+\/)*(.*\.\w*)*(\?.*)*/i',$url,$matches2);

 

hope this helps,

 

[kenrbnsn]

There is a builtin function that does that: parse_url().

 

<?php
$url = 'http://www.bookshop.com/book/en/catalog.php?id=12345';
$pu = parse_url($url);
echo '<pre>' . print_r($pu,true) . '</pre>;
?>

 

Will give you

Array
(
    [scheme] => http
    [host] => www.bookshop.com
    [path] => /book/en/catalog.php
    [query] => id=12345
)

 

Ken

 

[uniflare]

kenrbnsn i know thats what i said, look up

[kenrbnsn]

Sorry, I just saw your preg_match answer and didn't look at the quote that carefully.

 

Ken

[alexloh]

Yes, you can use PHP's parse_url() function to accomplish that. And in case if you want to retrieve just either the domain name or query string, you can pass in an optional component parameter to the parse_url() function. It will then return a string instead of an array.

 

<?php

  $url = 'http://www.bookshop.com/book/en/catalog.php?id=12345';

 

  // to return just the domain name

  echo parse_url($url, PHP_URL_HOST);

?>

 

Details see code example at: http://www.thewebscripter.com/tutorial/code_examples/parse_url.php

 

Hope this helps.

 

Alex

 

 

 

 

[Styles2304]

couldn't you also just do $_GET['id']?

[kenrbnsn]

No, the OP asked how to retrieve information from a given URL, not how to get the value passed via the URL that invoked the script. These are two different actions.

 

Ken

[wploh67]

Thanks everyone for your guides & tips. You guys are helpful. Thanks. 

 

Regards,

WP