Update Query Parameter

update_query_param.php

<?php

function update_query_param($url, $name, $value) {
    $parsed_url = parse_url($url);
    list($scheme, $host) = array_values($parsed_url);
	
    $path = '';
    if (isset($parsed_url['path'])) {
    	$path = $parsed_url['path'];
    }
    
    if (!isset($parsed_url['query'])) {
    	return $url;
    }
    $query = $parsed_url['query'];
    parse_str($query, $params);
    $params[$name] = $value;
    $updated_params = http_build_query($params);

    $fragment = '';
    if (isset($parsed_url['fragment'])) {
    	$parsed_fragment = $parsed_url['fragment'];
    	$fragment = "#parsed_fragment";
    }
    
    $updated_url = "$scheme://$host/$path?$updated_params$parsed_fragment";
    return $updated_url;
}