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

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