How to retrieve query string value from URL value stored in a variable?

Question

Hello,

$url = 'http://www.domain.com/file.php?dir=r&hl=100,200&ord=3&key=a+b+c';

If it were a url I could get value of hl by, say, $_GET['hl']. but how do I retrieve the same from $url string.

Thanks.

Answer 1

With the parse_url and parse_str functions.

$qs = parse_url($url, PHP_URL_QUERY);
parse_str($qs, $values);

This gives for $values:

array(4) {
  ["dir"]=>
  string(1) "r"
  ["hl"]=>
  string(7) "100,200"
  ["ord"]=>
  string(1) "3"
  ["key"]=>
  string(5) "a b c"
}

Answer 2

Here you go! http://php.net/manual/en/function.parse-url.php

Answer 3

Here are the steps:

$url = 'http://www.domain.com/file.php?dir=r&hl=100,200&ord=3&key=a+b+c';
print "<pre>";

print $url;

$url_parsed = parse_url($url);
print_r($url_parsed);

parse_str($url_parsed['query'], $url_parts);
print_r($url_parts);

print "</pre>";

Produces this output:

http://www.domain.com/file.php?dir=r&hl=100,200&ord=3&key=a+b+cArray
(
    [scheme] => http
    [host] => www.domain.com
    [path] => /file.php
    [query] => dir=r&hl=100,200&ord=3&key=a+b+c
)
Array
(
    [dir] => r
    [hl] => 100,200
    [ord] => 3
    [key] => a b c
)

See parse_url() and parse_str()

So the steps to get the h1 value you want are:

$url = 'http://www.domain.com/file.php?dir=r&hl=100,200&ord=3&key=a+b+c';
$url_parsed = parse_url($url);
parse_str($url_parsed['query'], $url_parts);
print $url_parts['h1'];