How can PHP be used to search through multiple folders and subfolders for specific files?

To search through multiple folders and subfolders for specific files using PHP, you can recursively scan each directory and check if the desired file exists. This can be achieved by using PHP's `RecursiveIteratorIterator` class along with `RecursiveDirectoryIterator` to iterate through directories and subdirectories. 

function searchForFile($directory, $filename) {
    $iterator = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($directory));
    
    foreach ($iterator as $file) {
        if ($file->isFile() && $file->getFilename() == $filename) {
            echo "Found file: " . $file->getPathname() . "\n";
        }
    }
}

// Usage example
$searchDirectory = '/path/to/search';
$searchFilename = 'example.txt';
searchForFile($searchDirectory, $searchFilename);

Keywords

PHP file system recursion glob directory traversal

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