gestor.php

<?php

	class Gestor {
	
		Private $arr;
		Private $largo;
		
		function __construct($arreglo) {
		
		$this->arr = $arreglo;
		$this->_largo();
				
		}
		
		Private function _largo() {
		
		$this->largo = count($this->arr);
		
		}
		
		Public function elementos() {
				
		echo $this->largo;
		
		}
		
		Public function promedio() {
		
		$sum = 0;
		
		$this->_largo();
		
		foreach($this->arr as $valor) {
			
		$sum += $valor;
			
		}
		
		$prom = $sum / $this->largo;
		echo $prom;
		
		}
		
	}
	
$arreglo = array(3, 12, 34);
$obj = new Gestor($arreglo);
$obj->largo = 5;

?>