(PHP 5, PHP 7)
DirectoryIterator::valid — Check whether current DirectoryIterator position is a valid file
Check whether current DirectoryIterator position is a valid file.
此函数没有参数。
Returns TRUE if the position is valid, otherwise FALSE
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
?>