PHP | FilesystemIterator next() Function

Last Updated : 26 Nov, 2019
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The FilesystemIterator::next() function is an inbuilt function in PHP which is used to move to the next file element. Syntax: 
void FilesystemIterator::next( void )
Parameters: This function does not accept any parameters. Return Value: This function does not return any value. Below programs illustrate the FilesystemIterator::next() function in PHP: Program 1: php 
<?php

// Create new file system iterator
$fileItr = new FilesystemIterator(dirname(__FILE__));

// Check for validity of file iterator
while ($fileItr->valid()) {

    // Check for directory
    if ($fileItr->isDir()) {

        // Display the filename
        echo $fileItr->getFilename() . "<br>";
    }

    // Move to the next element
    $fileItr->next();
}

?>
Output: 
dashboard
img
webalizer
xampp
Program 2: php 
<?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 if file iterator is not directory
    if (!$fileItr->isDir()) {

        // Display the key element
        echo $fileItr->key() . "<br>"; 
    }

    // Move to the next element
    $fileItr->next();
}

?>
Output: 
applications.html
bitnami.css
favicon.ico
geeks.PNG
gfg.php
index.php
Sublime Text Build 3211 x64 Setup.exe
Note: The output of this function depends on the content of server folder. Reference: https://www.php.net/manual/en/filesystemiterator.next.php

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