remove_query_string.php

<?php
/**
	* @return string
	* @param string $url
	* @param array $params
	*/
	public function removeQueryString($url,$params=array())
	{
		if(count($params)){
			foreach ($params as $value) {

        		$pattern = "#(&|\?)".$value."=[^&]+#";
        
				$url =preg_replace($pattern,'', $url);

				if(strrpos($url, '?')===false){
					$url =  preg_replace('#&#','?',$url, 1);
				}

			}
		}else{
			$url = substr($url, 0, strpos($url, "?"));
		}

		return $url;
	}