How to Iterate through Files in Subdirectories Using PHP\'s RecursiveDirectoryIterator and RecursiveIteratorIterator?

Iterating through Files in Subdirectories in PHP

To accomplish the task of iterating through all files within subdirectories, we can leverage the built-in RecursiveDirectoryIterator and RecursiveIteratorIterator classes in PHP. These classes provide a powerful way to traverse directories and their subdirectories recursively.

Code Structure

To structure your code according to the provided requirements, you can follow these steps:

<code class="php">$main = "MainDirectory";
$it = new RecursiveDirectoryIterator($main);</code>

Inner Loop (Subdirectories)

To iterate through the subdirectories, use a foreach loop on the $it variable:

<code class="php">foreach (new RecursiveIteratorIterator($it) as $subDir) {</code>

Outer Loop (Files)

Within the subdirectory loop, create another foreach loop to iterate through the files within each subdirectory:

<code class="php">    foreach (new RecursiveDirectoryIterator($subDir->getPathname()) as $file) {</code>

Actions on Files

Here, you can perform any desired actions on the individual files, such as:

<code class="php">        // Code to process each file
    }
}</code>

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