Parsing Requests

arquivo.php

    // basic GET param with no validation
    $blah = Request::get('blah');
    // GET param with validation
    $blah = Request::get('blah', Request::TYPE_DIGIT);
    // POST param
    $blah = Request::get('blah', Request::POST);
    // POST param with validation
    $blah = Request::get('blah', Request::POST, Request::TYPE_ALNUM);

Request.php

    <?php
    class Request
    {
      const TYPE_NONE   = 0;
      const TYPE_ALPHA  = 1;
      const TYPE_DIGIT  = 2;
      const TYPE_ALNUM  = 3;
      const GET         = 10;
      const POST        = 11;
      const COOKIE      = 12;
      const SESSION     = 13;
      public static function get($name, $method = null, $validation = null)
      {
        if ($method < self::GET && $validation === null) {
          $validation = $method;
          $method = self::GET;
        } else if ($method === null ) {
          $method = self::GET;
        }
        if ($validation === null) {
          $validation = self::TYPE_NONE;
        }
        $holder = null;
        switch ($method) {
          case self::GET:
            $holder = $_GET;
            break;
          case self::POST:
            $holder = $_POST;
            break;
          case self::COOKIE:
            $holder = $_COOKIE;
            break;
          case self::SESSION:
            $holder = $_SESSION;
            break;
        }
        if (!isset($holder[$name])) {
          return false;
        }
        $validator = null;
        switch ($validation) {
          case self::TYPE_ALNUM:
            $validator = 'alnum';
            break;
          case self::TYPE_DIGIT:
            $validator = 'digit';
            break;
          case self::TYPE_ALPHA:
            $validator = 'alpha';
            break;
        }
        $ret_val = $holder[$name];
        $valid_func = 'ctype_' . $validator;
        return (($validator === null) ? $ret_val : (( $valid_func($ret_val) ) ? $ret_val : null ) );
      }
    }