How to Iterate Through Directory Files in PHP?

PHP Script for Iterating through Directory Files

This article aims to provide guidance on writing a PHP script that loops through all files within a specified directory. The script empowers you to manipulate the filenames, sort them by various criteria, and exclude specific files from the list.

The DirectoryIterator Class

In PHP, the DirectoryIterator class offers a convenient way to iterate through directory files. An instance of this class represents a single file, providing access to metadata such as filename, file type, and modification time.

Example Code

The following code snippet demonstrates how to use the DirectoryIterator class:

<?php
$dir = new DirectoryIterator(dirname(__FILE__));
foreach ($dir as $fileinfo) {
    if (!$fileinfo->isDot()) {
        var_dump($fileinfo->getFilename());
    }
}
?>

In this code, we create a DirectoryIterator object for the specified directory. The foreach loop iterates through the files, excluding directories and hidden files by checking the isDot() method.

Sorting Files

To sort the files, you can use the sort() or uasort() functions. The following code snippet sorts the files by filename:

usort($dirArr, function($a, $b) {
    return strcasecmp($a->getFilename(), $b->getFilename());
});

Excluding Files

To exclude specific files, you can filter the array of files before or after the loop. The following code snippet excludes files whose names start with a "." (hidden files):

$dirArr = array_filter($dirArr, function($fileinfo) {
    return !preg_match('/^\./', $fileinfo->getFilename());
});

By leveraging the DirectoryIterator class and understanding its functionality, you can create custom scripts that loop through directory files, manipulate filenames, and meet your specific requirements.

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