PHP | DirectoryIterator next() Function

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The DirectoryIterator::next() function is an inbuilt function in PHP which is used to move forward to the next DirectoryIterator item.

Syntax:

void DirectoryIterator::next( void )

Parameters: This function does not accept any parameters.

Return Value: This function does not return any value.

Below programs illustrate the DirectoryIterator::next() function in PHP:

Program 1:

<?php 
  
// Create a directory Iterator 
$directory = new DirectoryIterator(dirname(__FILE__)); 
  
// Loop runs while directory is valid 
while ($directory->valid()) { 
      
    // Check for directory 
    if($directory->isDir()) { 
  
        // Display key and file name 
        echo $directory->key() . " => " .  
        $directory->getFilename() . "<br>"; 
    } 
  
    // Move to the next element 
    $directory->next(); 
} 
  
?> 

Output:

0 => .
1 => ..
4 => dashboard
8 => img
11 => webalizer
12 => xampp

Program 2:

<?php 
  
// Create a directory Iterator 
$directory = new DirectoryIterator(dirname(__FILE__)); 
  
// Loop runs while directory is valid 
while ($directory->valid()) { 
      
    // Check for file element 
    if($directory->isFile()) { 
  
        // Display the filename 
        echo $directory->getFilename() . "<br>"; 
    } 
  
    // Move to the next element 
    $directory->next(); 
} 
  
?> 

Output:

applications.html
bitnami.css
favicon.ico
zambiatek.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/directoryiterator.next.php

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