Add values to a query string in a URL [duplicate]

Question

Possible Duplicate:
Change single variable value in querystring

I'm retrieving the current URL:

http://example.com/?s=original&fq=category

and now I want to insert an additional argument for the s=

s=original+additional&fq=category

If anyone knows this off the top of their head it would be greatly appreciated!

EDIT:

This is in a PHP WordPress environment. I'm tempted to stick with PHP Regex because I'm not sure how to use jQuery/js

For what programming language? There are many solutions, and some don't even require regex if the lang supports a URL parsing function — Michael Berkowski
– Michael Berkowski, Commented Feb 1, 2012 at 17:59

user212218 · Accepted Answer · 2012-02-01 18:28:33Z

5

A solution that does not explicitly require regular expressions:

$old   = 'http://example.com/?s=original&fq=category';
$parts = parse_url($old);

parse_str($parts['query'], $query);
$query['s'] .= ' additional';

$new = sprintf(
  '%s://%s%s?%s'
    , $parts['scheme']
    , $parts['host']
    , $parts['path']
    , http_build_query($query)
);

echo 'Old: ', $old, PHP_EOL, 'New: ', $new, PHP_EOL;

The above code outputs:

Old: http://example.com/?s=original&fq=category
New: http://example.com/?s=original+additional&fq=category

answered Feb 1, 2012 at 18:28

user212218

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3 Comments

AlxVallejo Over a year ago

Actually maybe you could shed some light on this (or I can move it to a new topic): After the &fq=category, there is a colon and the actual category is wrapped in quotes (in Mozilla) like so, :"Yogurt" . If I copy and paste the URL, the output is, :%22Yogurt%22 . Now, if I use the solution you provided, the copy and pasted URL output is, %3A\%22Yogurt\%22 . So I'm experience some inconsistency here. I think I'll move this to a new issue.

AlxVallejo Over a year ago

I came up with a temporary fix: $query['fq'] = stripslashes(urldecode($query['fq']));

user212218 Over a year ago

That's odd; I'm not able to replicate, though I think I found the new issue you created, so I'll take a look.

Cal · Accepted Answer · 2012-02-01 18:29:24Z

3

PHP has builtin functions for parsing and rebuilding URLs:

$bits = parse_url($url);
$args = parse_str($bits['query']);

$args['s'] .= 'morestuff';

$bits['query'] = http_build_query($args);
$new_url = http_build_url($bits);

answered Feb 1, 2012 at 18:29

Cal

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Comments

Joey · Accepted Answer · 2012-02-01 18:12:33Z

1

preg_replace($s, '/([?&]s=)([^&]+)/', '$1$2+additional');

Quick PowerShell test:

PS> $urls = 'http://example.com/?s=original&fq=category', 'http://example.com/?a=original&s=foo&fq=category'
PS> $urls -replace '([?&]s=)([^&]+)', '$1$2+additional'
http://example.com/?s=original+additional&fq=category
http://example.com/?a=original&s=foo+additional&fq=category

edited Feb 1, 2012 at 18:12

answered Feb 1, 2012 at 18:07

Joey

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2 Comments

AlxVallejo Over a year ago

$1 refers to the existing search term?

Joey Over a year ago

$1 refers to whatever is matched by the first parenthesis. In this case this includes a ? or & and s=.

anubhava · Accepted Answer · 2012-02-01 18:09:39Z

0

You can this preg_replace:

$url = 'http://example.com/?s=original&fq=category';
$regex = '~([&?]s=)([^&]*)(&|$)~i';
$url = preg_replace($regex, '$1$2+additional$3', $url);
var_dump($url);

OUTPUT:

string(53) "http://example.com/?s=original+additional&fq=category"

answered Feb 1, 2012 at 18:09

anubhava

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