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