Handling of GET/POST values in PHP

To print all the posted values

            foreach($_POST as $key => $value) echo $key." = ".$value."<br/>";
            foreach($_GET as $key => $value) echo $key." = ".$value."<br/>";
(or)
            print_r($_POST);
(or)            
            $be_var = $_POST; 
            foreach ( $be_var as $key => $value ) 
           {
                 $be_var = $be_var."&".$key."=".$value; 
            }
(or)
            foreach ( $_POST as $key => $value ) {
                    echo $key."=".$value."<br>";
            }

To get the values of list box with multiple select option

            if(isset($_POST["txt_multi"])){
                    echo "count : ".count($_POST["txt_multi"])."<br>";
                    foreach($_POST["txt_multi"] as $k => $val) echo $k." =".$val."<br/>";         
            }