SplObjectStorage::valid
(PHP 5 >= 5.1.0, PHP 7)
SplObjectStorage::valid — 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
Example #1 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