(PHP 5 >= 5.1.0, PHP 7, PHP 8)
SplObjectStorage::valid — 返回目前迭代器項目是否有效
此函式沒有參數。
範例 #1 SplObjectStorage::valid() 範例
<?php
$s = new SplObjectStorage();
$o1 = new stdClass;
$o2 = new stdClass;
$s->attach($o1, "d1");
$s->attach($o2, "d2");
$s->rewind();
while($s->valid()) {
echo $s->key()."\n";
$s->next();
}
?>以上範例的輸出會類似於
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