SplObjectStorage::valid()
(PHP 5 >= 5.1.0, PHP 7)
Returns if the current iterator entry is valid
说明
public SplObjectStorage::valid(void) : bool
Returns if the current iterator entry is valid.
参数
此函数没有参数。
返回值
Returns TRUE
if the iterator entry is valid,FALSE
otherwise.
范例
SplObjectStorage::valid() example
<?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(); } ?>
以上例程的输出类似于:
0 1
参见
- SplObjectStorage::current() Returns the current storage entry
- SplObjectStorage::getInfo() Returns the data associated with the current iterator entry