PHP | FilesystemIterator next() Function

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:

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<?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();
}
  
?>

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Output:

dashboard
img
webalizer
xampp

Program 2:

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<?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();
}
  
?>

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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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