pearCheck.php

<?php

// php pearCheck.php basePath targetPath

const COMPLETE_MESSAGE = 'OK';
const ERROR_MESSAGE = 'NG';

echo checkMd5Files($argv[1], $argv[2]);

function checkMd5Files($basePath, $targetPath) {

    $baseHash = md5_file($basePath);
    $targetHash = md5_file($targetPath);

    if ($baseHash === $targetHash) {

        return COMPLETE_MESSAGE;

    } else {

        return ERROR_MESSAGE ;

    }
}