The DirectoryIterator::valid() function is an inbuilt function in PHP which is used to check the current DirectoryIterator position is a valid file or not.
Syntax:
bool DirectoryIterator::valid( void )
Parameters: This function does not accept any parameters.
Return Value: This function returns TRUE if the position is valid, otherwise returns FALSE.
Below programs illustrate the DirectoryIterator::valid() function in PHP:
Program 1:
<?php // Create a directory Iterator $directory = new DirectoryIterator(dirname(__FILE__)); // Move to the third element $directory->seek(2); // Check the validity of directory element if($directory->valid()) { // Display the filename echo $directory->getFilename(); } ?> |
Output:
applications.html
Program 2:
<?php // Create a directory Iterator $directory = new DirectoryIterator(dirname(__FILE__)); // Loop runs while directory is valid while ($directory->valid()) { // Check for directory element if($directory->isDir()) { // Display the key and filename echo $directory->key() . " => " . $directory->getFilename() . "<br>"; } // Move to the next element $directory->next(); } ?> |
Output:
0 => . 1 => .. 4 => dashboard 8 => img 11 => webalizer 12 => xampp
Note: The output of this function depends on the content of server folder.
Reference: https://www.php.net/manual/en/directoryiterator.valid.php
