DirectoryIterator::valid

(PHP 5, PHP 7, PHP 8)

DirectoryIterator::validCheck whether current DirectoryIterator position is a valid file

说明

public DirectoryIterator::valid(): bool

Check whether current DirectoryIterator position is a valid file.

参数

此函数没有参数。

返回值

Returns true if the position is valid, otherwise false

示例

示例 #1 A DirectoryIterator::valid() example

<?php
$iterator
= new DirectoryIterator(dirname(__FILE__));

// Loop to end of iterator
while($iterator->valid()) {
$iterator->next();
}

$iterator->valid(); // FALSE
$iterator->rewind();
$iterator->valid(); // TRUE

?>

参见

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User Contributed Notes 1 note

up
-2
josh dot butts at vertive dot com
16 years ago
This function, as far as I can tell, returns boolean, not string.

$di = new DirectoryIterator(/path/to/iterate);
while ($di->valid())
{
    echo $di->getPathname() . "\n";
    $di->next();
}
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