How can PHP be used to count files in subfolders that start with specific prefixes like "IMG" or "CMG"?

To count files in subfolders that start with specific prefixes like "IMG" or "CMG" in PHP, we can use the RecursiveDirectoryIterator and RegexIterator classes. By iterating through each file in the directory and checking if the filename matches the specified prefix using a regular expression, we can count the files that meet the criteria. 

<?php
$directory = 'path/to/directory';

$iterator = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($directory));
$files = new RegexIterator($iterator, '/^(IMG|CMG)/i', RecursiveRegexIterator::GET_MATCH);

$count = iterator_count($files);

echo "Number of files starting with 'IMG' or 'CMG': $count";
?>

Keywords

PHP file count subfolders specific prefixes opendir

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