<?php
 
class Test{
    private $sp;
 
    public function __construct(){
        $this->sp = new SplObjectStorage();
    }
 
    public function addToSpl($object){
        $this->sp->attach($object);
    }
 
    public function getSp()
    {
        return $this->sp;
    }
}
 
$t = new Test();
 
$t->addToSpl(new StdClass());
$t->addToSpl(new StdClass());
$t->addToSpl(new StdClass());
 
$sp = $t->getSp();
 
foreach ($sp as $v){
    echo "First \n";
    $s = $t->getSp();
    foreach ($s as $a){
        echo "Second \n";
    }
}

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