(PHP 5 >= 5.1.0, PHP 7, PHP 8)
SplObjectStorage::contains — 檢查儲存區是否包含特定物件
範例 #1 SplObjectStorage::contains() 範例
<?php
$o1 = new stdClass;
$o2 = new stdClass;
$s = new SplObjectStorage();
$s[$o1] = "hello";
var_dump($s->contains($o1));
var_dump($s->contains($o2));
?>上述範例將輸出類似以下的內容：
bool(true) bool(false)