PHP function to remove variable from URL string

This function removes a variable name and variable value from an URL string, it will return the new string/url without the given variable, and will adjust the "?" or "&" character properly:

Example

remove_var_from_url("total_items","http://example.com?total_items=10&sort_by=price");

will return:

http://example.com?sort_by=price

The complete function is

<?php
if(!function_exists("remove_var_from_url")){
	function remove_var_from_url($variable_name,$url_string){
		if(strpos($url_string,"?")!==false){
			$start_pos = strpos($url_string,"?");
			$url_vars_strings = substr($url_string,$start_pos+1);
			$names_and_values = explode("&",$url_vars_strings);
			$url_string = substr($url_string,0,$start_pos);
			foreach($names_and_values as $value){
				list($var_name,$var_value)=explode("=",$value);
				if($var_name != $variable_name){
					if(strpos($url_string,"?")===false){
						$url_string.= "?";
					} else {
						$url_string.= "&";
					}
					$url_string.= $var_name."=".$var_value;
				}
			}
		} 
		return $url_string;
	}
}?>

The oposite function (add variable to url) is also available.

Download the files

Download the function PHP file (1KB)

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