(PHP 5 >= 5.1.0, PHP 7, PHP 8)
SplObjectStorage::contains — 检查存储区是否包含特定对象
示例 #1 SplObjectStorage::contains() 示例
<?php
$o1 = new stdClass;
$o2 = new stdClass;
$s = new SplObjectStorage();
$s[$o1] = "hello";
var_dump($s->contains($o1));
var_dump($s->contains($o2));
?>以上示例将输出类似以下内容
bool(true) bool(false)