php - Appending query strings to URL - Stack Overflow

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"Appending an url with appendages that were already in the previous url?" That's the most confusing title -- I know. But I can't think of a better way to explain it.

Maybe the below example will help.

I have URL 1: /?value=xyz&stuff=abc

If someone clicks on a link within the page, can I pass along the appended values?

ie: /?value=xyz&stuff=abc

Thanks and sorry for being such a noob.

"Appending an url with appendages that were already in the previous url?" That's the most confusing title -- I know. But I can't think of a better way to explain it.

Maybe the below example will help.

I have URL 1: http://example./?value=xyz&stuff=abc

If someone clicks on a link within the page, can I pass along the appended values?

ie: http://www.example/?value=xyz&stuff=abc

Thanks and sorry for being such a noob.

• php
• javascript
• query-string

Share Improve this question Follow edited Jan 9, 2013 at 1:30 John Carter 55.4k2828 gold badges115115 silver badges144144 bronze badges asked Sep 17, 2012 at 23:47 user1678869user1678869 1111 silver badge22 bronze badges 3

• How this link is built? With JavaScript or PHP? – raina77ow Commented Sep 17, 2012 at 23:48
• 1 Where's your code. Have you tried anything yet? – Luke Mills Commented Sep 17, 2012 at 23:50
• What do you mean pass it along? Do you want it in the URL? In PHP, that information is in $_SERVER['QUERY_STRING'] – ernie Commented Sep 17, 2012 at 23:52

Add a ment  | 

3 Answers 3

Sorted by: Reset to default 7

These appendages you ask about is the actual so called query part of an URI:

<scheme>://<authority><path>?<query>

  foo://example.:8042/over/there?name=ferret#nose
  \_/   \______________/\_________/ \_________/ \__/
   |           |            |            |        |
scheme     authority       path        query   fragment

Taken from: 3. Syntax Components (RFC 3986) https://www.rfc-editor/rfc/rfc3986#page-16

You then need a helper function that is append the (optional) <query> to an existing <scheme>://<authority><path> part. I ignore the <fragment> for this exmaple, as it would needed to be added at the end and I want to leave something as an exercise:

function href_append_query($href)
{
    $query = isset($_SERVER['QUERY_STRING'])
        ? '?' . $_SERVER['QUERY_STRING']
        : ''
    ;

    $query = strtr(
        $query, [
            '"' => '"',
            "'" => ''',
            '&' => '&'
        ]
    );

    return $href . $query;
}

And it's usage:

<a href="<?=href_append_query('http://step2./')?>Some link</a>

This little function will ensure that the exisitng QUERY_STRING which can be obtained via $_SERVER^Docs is encoded for HTML output.

If links are built with PHP, just append the original query string to them:

<a href="http://step2./?<?php echo $_SERVER['QUERY_STRING']; ?>">Some link</a>

In JavaScript, just append the value of window.location.search to all the links you need to 'pass' the query string.

You could also use js/jquery to append the existing query string to each link on the page:

 $(function() {
    $('a').each(function() {
      link = $(this).attr('href');
      query = window.location.search;
      if (link.indexOf('?') !== -1 && query !== '') {
        query = query.replace('?','&');
      }
      $(this).attr('href',link+query);
    });
  });

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