Beautify JSON files

jsonBeautifier.php

<?php
    $path = call_user_func(function() {
        global $argv;

        return isset($argv[1]) === true ?
            $argv[1] :
            '.';
    });
    
    function findJSONFiles($path) {
        $paths = array();
 
        foreach (scandir($path) as $item) {
            if ($item[0] === '.') {
                continue;
            }

            $path2 = "$path/$item";

            if (is_dir($path2) === true) {
                $paths = array_merge($paths, findJSONFiles($path2));
            }

            if (substr($item, -5) !== '.json') {
                continue;
            }

            $paths[] = $path2;
        }

        return $paths;
    }

    $paths = findJSONFiles($path);

    foreach ($paths as $path) {
        echo "$path\n";
        $data = json_decode(file_get_contents($path));
        file_put_contents($path, json_encode($data, JSON_PRETTY_PRINT));
    }