append query string to any form of URL

Question

I ask user to input a URL in a text-box and need to append a query string to it.

Possible values of URLs can be like:

1. http://www.example.com

2. http://www.example.com/a/

3. http://www.example.com/a/?q1=one

4. http://www.example.com/a.html

5. http://www.example.com/a.html?q1=one

Now I need to add query string to it like "q2=two", so that output would be like:

1. http://www.example.com/?q2=two

2. http://www.example.com/a/?q2=two

3. http://www.example.com/a/?q1=one&q2=two

4. http://www.example.com/a.html?q2=two

5. http://www.example.com/a.html?q1=one&q2=two

How can I achieve the following using PHP?

Answer 1

<?php  $urls = array(          'http://www.example.com',          'http://www.example.com/a/',          'http://www.example.com/a/?q1=one',          'http://www.example.com/a.html',          'http://www.example.com/a.html?q1=one'         );  $query = 'q2=two';  foreach($urls as &$url) {    $parsedUrl = parse_url($url);    if ($parsedUrl['path'] == null) {       $url .= '/';    }    $separator = ($parsedUrl['query'] == NULL) ? '?' : '&';    $url .= $separator . $query; }  var_dump($urls); 

Output

array(5) {   [0]=>   string(29) "http://www.example.com/?q2=two"   [1]=>   string(32) "http://www.example.com/a/?q2=two"   [2]=>   string(39) "http://www.example.com/a/?q1=one&q2=two"   [3]=>   string(36) "http://www.example.com/a.html?q2=two"   [4]=>   &string(43) "http://www.example.com/a.html?q1=one&q2=two" } 

CodePad.

Answer 2

$url is your URL. Use strpos function

if(strpos($url,'?') !== false) {    $url .= '&q2=two'; } else {    $url .= '?q2=two'; }