Is there a more efficient method than using glob() in PHP to count files with specific prefixes in subfolders?

Using glob() in PHP to count files with specific prefixes in subfolders can be inefficient for large directories as it searches recursively through all directories. A more efficient method is to use the RecursiveDirectoryIterator and RecursiveIteratorIterator classes in combination with RegexIterator to filter files based on specific prefixes. This allows for a more targeted search through the directory structure. 

$directory = new RecursiveDirectoryIterator('/path/to/directory');
$iterator = new RecursiveIteratorIterator($directory);
$files = new RegexIterator($iterator, '/^prefix.*\.txt$/i', RecursiveRegexIterator::GET_MATCH);

$count = iterator_count($files);

echo "Number of files with prefix 'prefix' in subfolders: " . $count;

Keywords

PHP glob() subfolders file count efficiency

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