Online PHP editor | refs for PETeB

<?php class T { static $results=array(); static function insert( $number ) { //Inserts a number into the array array_push( self::$results, $number ); return new static; } static function add( $number ) { //Adds to the last inserted number self::$results[] = array_pop(self::$results) + $number; return new static; } static function results() { //Display results foreach(self::$results as $k=>$v) { echo "{$k} : {$v}<BR>\n"; } } } T::insert(4)-> add(2)-> insert(12)-> insert(2)-> add(1)-> results();