Capture value from URL string with php

Question

I need to extract a variable's value from a string, which happens to be a URL. The string/url is loaded as part of a separate php query, not the url in the browser.

The url's will look like:

index.php?option=com_content&view=article&catid=334:golfeq&id=2773:xcelsiors&Itemid=44

How can I always find & capture the value of the id which in this example is 2773?

I read several examples already, but what I've tried captures the id value of the current page which is being viewed in the browser, and not the URL string.

Thanks

The value of id is not "2773" but "2773:xcelsiors".

CodeCaster
– CodeCaster

2011-12-04 10:28:59 +00:00
Commented Dec 4, 2011 at 10:28 — CodeCaster
– CodeCaster, Commented Dec 4, 2011 at 10:28

Jon · Accepted Answer · 2011-12-04 05:43:56Z

6

You are looking for a combination or parse_url (which will isolate the query string for you) and parse_str (which will parse the variables and put them into an array).

For example:

$url = 'index.php?option=com_content&view=article&catid=334:golfeq&id=2773:xcelsiors&Itemid=44';

// This parses the url for the query string, and parses the vars from that
// into the array $vars (which is created on the spot).
parse_str(parse_url($url, PHP_URL_QUERY), $vars);

print_r($vars); // see what's in there

// Parse the value "2773:xcelsiors" to isolate the number
$id = reset(explode(':', $vars['id']));

// This will also work:
$id = intval($vars['id']);

echo "The id is $id\n";

See it in action.

edited Dec 4, 2011 at 5:43

answered Dec 4, 2011 at 5:38

Jon

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1 Comment

user1079732 Over a year ago

Thanks for the response. I think I'm seeing the symptoms of why this is not working for me. When i perform the print_r($vars), instead of getting for example [catid] => 334:golfeq it's showing [amp;catid] => 334 So I think there's some problem processing the "&". Any idea how I can address that?

Ashok KS · Accepted Answer · 2011-12-04 10:22:22Z

1

You can use parse_str

edited Dec 4, 2011 at 10:22

answered Dec 4, 2011 at 5:40

Ashok KS

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1 Comment

kba Over a year ago

The string is not the site's URL, hence the values won't be in the $_GET array.

Paulo H. · Accepted Answer · 2011-12-04 05:41:40Z

0

You can use parse_url to parse URLs!

But you can use, to extract directly the numbers of ID variable:

$url = 'index.php?option=com_content&view=article&catid=334:golfeq&id=2773:xcelsiors&Itemid=44';
$id = preg_replace("/^.*[&?]id=([0-9]+).*$/",'$1',$url);
echo $id;

answered Dec 4, 2011 at 5:41

Paulo H.

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