DirectoryIterator::valid

(PHP 5, PHP 7, PHP 8)

DirectoryIterator::valid — Check whether current DirectoryIterator position is a valid file

說明

public DirectoryIterator::valid(): bool

Check whether current DirectoryIterator position is a valid file.

參數(shù)

此函數(shù)沒有參數(shù)。

返回值

Returns true if the position is valid, otherwise false

范例

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

?>

參見