The FilesystemIterator::key() function is an inbuilt function in PHP which is used to retrieve the key for the current file.
Syntax:
string FilesystemIterator::key( void )
Parameters: This function does not accept any parameters.
Return Value: This function returns the pathname or filename depending on the set flags.
Below programs illustrate the FilesystemIterator::key() function in PHP:
Program 1:
<?php // Create new file system iterator $fileItr = new FilesystemIterator(dirname( __FILE__ ),
FilesystemIterator::KEY_AS_FILENAME);
// Loop runs for each element of file iterator foreach ( $fileItr as $it ) {
// Display the key
echo $fileItr ->key() . "<br>" ;
} ?> |
Output:
applications.html bitnami.css dashboard favicon.ico gfg.php img index.php webalizer xampp
Program 2:
<?php // Create new file system iterator $fileItr = new FilesystemIterator(dirname( __FILE__ ),
FilesystemIterator::KEY_AS_FILENAME);
// Loop runs while file iterator is valid while ( $fileItr ->valid()) {
// Check for non directory files
if (! $fileItr ->isDir()) {
// Display the key
echo $fileItr ->key() . "<br>" ;
}
// Move to the next element
$fileItr ->next();
} ?> |
Output:
applications.html bitnami.css favicon.ico gfg.php index.php
Note: The output of this function depends on the content of server folder.
Reference: https://www.php.net/manual/en/filesystemiterator.key.php