DirectoryIterator::valid

(PHP 5, PHP 7)

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

说明

public bool DirectoryIterator::valid ( void )

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

范例

Example #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