input helper

input.php

<?php defined('SYSPATH') or die('No direct script access.');

class Kohana_Input {

	protected static $user_agent = FALSE;

	public static function get($key = NULL, $default = NULL) {
		return self::find_key($_GET, $key, $default);
	}

	public static function post($key = NULL, $default = NULL) {
		return self::find_key($_POST, $key, $default);
	}

	public static function cookie($key = NULL, $default = NULL) {
		return self::find_key($_COOKIE, $key, $default);
	}

	public static function server($key = NULL, $default = NULL) {
		return self::find_key($_SERVER, $key, $default);
	}

	public static function user_agent() {
		if (self::$user_agent === FALSE) {
			self::$user_agent = ( ! empty($_SERVER['HTTP_USER_AGENT']) ? trim($_SERVER['HTTP_USER_AGENT']) : '');
		}
		return self::$user_agent;
	}

	protected static function find_key($array, $key = NULL, $default = NULL) {
		if (is_null($key))
			return $array;
		if (is_string($key) AND array_key_exists($key, $array))
			return $array[$key];
		return $default;
	}

}