Find duplicate strings in Laravel resource lang folders

duplicate-lang-str.php

<?php
/*
 * This program takes in a Laravel Resource folder strings and finds the frequency of the strings i.e. repeatation.
 * Usage: php duplicate-lang-str.php ~/Desktop/resources/lang/en/
 */

if (!isset($argv[1])) {
    die(sprintf("\e[37;41mFolder path unspecified\e[39;49m\nCommand usage: php %s <folder-path>", $argv[0]));
}

if (!file_exists($argv[1])) {
    die("\e[37;41mDirectory does not exist in the given path!\e[39;49m");
}

if (!is_dir($argv[1])) {
    die("\e[37;41mGiven path is not a valid directory!\e[39;49m");
}

$files = getPhpFiles($argv[1]);

$multiArr = [];
foreach ($files as $file) {
    $multiArr[] = require $file;
}

$resultArr = [];
$resultCountArr = [];

flatten_arr($multiArr, $resultArr, $resultCountArr);
foreach ($resultArr as $key => $value) {
    if (isset($argv[2])) {
        if ($resultCountArr[$key] >= ((int) $argv[2])) {
            echo sprintf("%s - %d times\n", $value, $resultCountArr[$key]);
        }
    } else {
        echo sprintf("%s - %d times\n", $value, $resultCountArr[$key]);
    }
}

function flatten_arr($multiArr, &$valuesArr = [], &$valuesCountArr = [])
{
    foreach ($multiArr as $key => $value) {
        if (is_array($value)) {
            flatten_arr($value, $valuesArr, $valuesCountArr);
        } else {
            if (($key = array_search($value, $valuesArr)) !== false) {
                $valuesCountArr[$key]++;
            } else {
                $valuesArr[] = $value;
                $valuesCountArr[] = 1;
            }
        }
    }
}

function config() {} // In case it's defined

function getPhpFiles($startDir, &$phpFiles = [])
{
    if ($handle = opendir($startDir)) {
        while (false !== ($entry = readdir($handle))) {
            if ($entry != "." && $entry != "..") {
                $fullPath = $startDir . DIRECTORY_SEPARATOR . $entry;
                if (is_dir($fullPath)) {
                    getPhpFiles($fullPath, $phpFiles);
                } else {
                    if (pathinfo($fullPath)['extension'] == 'php') {
                        $phpFiles[] = $fullPath;
                    }
                }
            }
        }
        closedir($handle);
    }
    return $phpFiles;
}