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What potential pitfalls should be considered when using RecursiveIteratorIterator and RecursiveDirectoryIterator in PHP for file manipulation tasks?

One potential pitfall when using RecursiveIteratorIterator and RecursiveDirectoryIterator in PHP for file manipulation tasks is the possibility of running into infinite loops if the directory structure is circular or if there are symbolic links pointing to parent directories. To avoid this issue, you can use the FilesystemIterator::SKIP_DOTS flag to skip over "." and ".." directories.

php 
$directory = new RecursiveDirectoryIterator('/path/to/directory', FilesystemIterator::SKIP_DOTS);
$iterator = new RecursiveIteratorIterator($directory, RecursiveIteratorIterator::SELF_FIRST);

foreach ($iterator as $file) {
    // Perform file manipulation tasks here
}

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