Online PHP editor | output for 4ZERD

<?php class foo { public function __construct() {} public function add_single ( int $itemOne, int $itemTwo ) : void { echo $itemOne + $itemTwo; } public function add_Multiples ( int $itemOne, array $items ) : void { #========== COMMENT: VARIABLE(S); $intI = 0; $intCount_Selection = count( $items ) - 1; while( $intI <= $intCount_Selection ) { $this->add_single( $itemOne, (int)$items[$intI] ); $intI++; } } } $objAdder = new foo(); $objAdder->add_Single(2,3); $arrItems = array( 2, 5 ); $objAdder->add_Multiples(2, $arrItems);