<?php
	// manual example
	// we want to fetch 2 GET args and 2 POST args
	// example code:
	if (isset($_GET['string']))
	{
		$string = trim($_GET['string']);
	} else {
		$string = '';
	}

	if (isset($_GET['numbers']))
        {
		// some of You probably will use other function to check if arg is an number, anyway
		if (preg_match("/^[0-9]+$/D", $_GET['numbers']))
		{
                	$numbers = $_GET['numbers']);
		} else {
			$numbers = '';
		}
        } else {
                $numbers = '';
        }

        if (isset($_POST['text']))
        {
                $text = htmlspecialchars(strtolower(trim($_POST['text'])) , ENT_QUOTES);
        } else {
                $text = '';
        }

	if (isset($_POST['special']))
        {
		if (preg_match("/^[a-z0-9\.\+]+$/Di", $_POST['special']))
		{
                	$special = $_POST['special'];
		} else {
			$special = '';
		}
        } else {
                $special = '';
        }
	// and many many more examples....


	// pg.class style
	require_once("pg.class.php");

	$in = new pgin(); // will use default mb_internal_encoding for mb_strto*() functions and htmlspecialchars
	$in = new pgin('UTF-8'); // will use UTF-8 - set it as you need

	$in->parse('g', array(
		'-string' => ALLC,
		'numbers' => NR 
	));

	$in->parse('p', array(
		',-text' => HSC,
		'special' => array(CSR => '/^[a-z0-9\.\+]+$/Di')
	));

	print_r($in->g);
	print_r($in->p);

	// format tricks
	// ^ - in the name of var name -> strtoupper()
	// , - in the name of var name -> strtolower()
	// - - in the name of var name -> trim()

	// preconfigured types - see the source for more info
	// define('HSC', 'html_special_chars');
	// define('NR', 'numbers');
	// define('LT', 'letters'); // case insensitive
	// define('LTNR', 'letters_numbers'); // case insensitive
	// define('CSR', 'custom_regexp');
	// define('ALLC', 'all_chars');

	// when input arg not match declared option, $in->g['foo'] will be set to FALSE
	// when input arg is not set (example: index.php) $in->g['foo'] will be not exist
	// when input arg is set but is empty (example: index.php?foo=) $in->g['foo] will be set to NULL
?>