<?php
	$do = $_GET['do'];
	if(in_array($do, array('phpinfo', 'env', 'check_function'))){
		if(trim($do) == 'phpinfo'){
			phpinfo();
		}else if(trim($do) == 'check_function'){
			var_dump(function_exists($_GET['fun']));
		}else{
			echo var_export($_ENV, true);
		}
	}else{
		phpinfo();
	}