Calculate how much indentation there is in your PHP project

calculate-indentation.php

<?

$spaces = calculate_spaces('folder-name');

echo 'Spaces and tabs used for indentation account for '.$spaces['percent'].'% of selected folder\'s files ('.$spaces['spaces'].' spaces, '.$spaces['total'].' total characters).';


function calculate_spaces($path) {

    $spaces_counter = 0;
    $total_counter = 0;
    $paths = list_files_recursive($path);

    foreach($paths as $path) {
        if(is_allowed_type($path)) {
            $lines = split_into_lines($path);
            foreach($lines as $line) {
                $spaces_counter += count_indentation_chars($line);
            }

            $total_counter += file_size($path);
        }
    }

    return array(
        'spaces' => $spaces_counter,
        'total' => $total_counter,
        'percent' => number_format(($spaces_counter/$total_counter)*100, 2)
        );
}

function list_files_recursive($dir) {

    $file_list = array();
    $elements = scandir($dir);

    foreach($elements as $element) {
        if(!in_array($element, array('.', '..'))) {
            if(is_dir($dir.'/'.$element)) {
                $tmp = list_files_recursive($dir.'/'.$element);
                $file_list = array_merge($file_list, $tmp);
            }
            else {
                $file_list[] = $dir.'/'.$element;
            }
        }
    }

    return $file_list;
}

function is_allowed_type($filename) {

    $allowed_types = array('php', 'htm', 'html');

    $type = end(explode('.', $filename));

    return in_array($type, $allowed_types);
}

function split_into_lines($path) {

    $data = read_file($path);

    if($data !== false) {
        return preg_split('/\r\n|\r|\n/', $data);
    }
    else {
        return false;
    }
}

function read_file($path) {

    if (!file_exists($path)) {
        return false;
    }

    return file_get_contents($path);
}

function file_size($path) {

    if (!file_exists($path)) {
        return 0;
    }

    return filesize($path);
}

function count_indentation_chars($string) {

    $length = 0;
    $matches = array();

    preg_match('/^[ \t]+/', $string, $matches);

    foreach($matches as $match) {
        $length += strlen($match);
    }

    return $length;
}