Gets the current displayed url for a page. key <> value pairs can be stripped from the url by key.

helper_get_current_url.php

<?php
/**
 * Gets the current displayed url
 * @strip array of key names to be stripped from the url
 * @returns the url
 */
protected function get_current_url( $strip = NULL ) {
	$url  = isset( $_SERVER["HTTPS"] ) && $_SERVER['HTTPS'] == "on" ? 'https://' : 'http://';
	$url .= ( strlen( $_SERVER["SERVER_NAME"] ) ? $_SERVER["SERVER_NAME"] : $_SERVER['HTTP_HOST']);
	$url .= ( !in_array( strval( $_SERVER["SERVER_PORT"] ), array( "80", "443" ) ) ) ? $_SERVER["SERVER_PORT"] : '';

	if (!is_null($strip)) :
		$url .= preg_replace( "/[&\?](".implode("|", $strip).")=?[^&]*/", "", $_SERVER["REQUEST_URI"] );
	else :
		$url .= $_SERVER["REQUEST_URI"];
	endif;
	return $url;	
}
?>