PHP command line script. It detect encoding from files on directory and subdirectories and print it.

batch_detect_encoding.php

<?php
function print_file_encoding_from($dir){
    if($handle = opendir($dir)){
        echo "\n\n## Directory is $dir\n\n";
        while(false !== ($file = readdir($handle))){
            if(in_array($file, array('.', '..', '.git'))){
                continue;
            }
            $file_path = realpath($dir . DIRECTORY_SEPARATOR . $file);
            $extension = pathinfo($file_path, PATHINFO_EXTENSION);
            if(!in_array(strtolower($extension), array('php', 'htm', 'html', 'js', 'txt')) and is_file($file_path)){
                continue;
            }
            if(is_file($file_path)){
                $encoding = mb_detect_encoding(file_get_contents($file_path), array('utf-8', 'cp949', 'euc-kr'));
                echo "$encoding - $file_path\n";
            }else{
                print_file_encoding_from($file_path);
            }
        }
        closedir($handle);
    }else{
        echo 'Opening failed.';
    }
}

if(empty($argv[1])){
    echo "Usage: php $argv[0] dir_path\n";
    exit;
}
$dir = realpath($argv[1]);
if(!$dir){
    echo "$argv[1] is incorrect path.";
    exit;
}

echo "=== Scanning $dir start! ===\n";

print_file_encoding_from($dir);