better way to replace query string value in a given url

✔ Recommended Answer

How about something like this?

function merge_querystring($url = null,$query = null,$recursive = false){  // $url = 'http://www.google.com.au?q=apple&type=keyword';  // $query = '?q=banana';  // if there's a URL missing or no query string, return  if($url == null)    return false;  if($query == null)    return $url;  // split the url into it's components  $url_components = parse_url($url);  // if we have the query string but no query on the original url  // just return the URL + query string  if(empty($url_components['query']))    return $url.'?'.ltrim($query,'?');  // turn the url's query string into an array  parse_str($url_components['query'],$original_query_string);  // turn the query string into an array  parse_str(parse_url($query,PHP_URL_QUERY),$merged_query_string);  // merge the query string  if($recursive == true)    $merged_result = array_merge_recursive($original_query_string,$merged_query_string);  else    $merged_result = array_merge($original_query_string,$merged_query_string);  // Find the original query string in the URL and replace it with the new one  return str_replace($url_components['query'],http_build_query($merged_result),$url);}

usage...

<a href="<?=merge_querystring($url,'?page=1');?>">Page 1</a><a href="<?=merge_querystring($url,'?page=2');?>">Page 2</a>

Source: stackoverflow.com

Answered By: Scuzzy

Method #2

In PHP, you can use the parse_url() and http_build_query() functions to parse and rebuild a URL, respectively. Here's an example of how to replace a query string value in a given URL:

php
$url = "https://www.example.com/search?q=keyword&page=1";

// Parse the URL into its component parts
$urlParts = parse_url($url);

// Parse the query string into an array
parse_str($urlParts['query'], $query);

// Replace the value of the 'page' parameter
$query['page'] = 2;

// Rebuild the URL with the updated query string
$urlParts['query'] = http_build_query($query);
$newUrl = $urlParts['scheme'] . '://' . $urlParts['host'] . $urlParts['path'] . '?' . $urlParts['query'];

// Output the new URL
echo $newUrl;

In this example, the original URL is parsed using parse_url() to get its component parts. The query string is then parsed into an array using parse_str(), and the value of the 'page' parameter is updated to 2. Finally, the updated query string is rebuilt using http_build_query(), and the new URL is reconstructed and outputted.

This approach allows you to easily manipulate query string parameters in a given URL while preserving the rest of the URL's structure.

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