防篡改php文件校验程序

<?php
/**
 * 校验线上源文件是否和本地的一致
 * User: Administrator
 * Date: 2015/11/26
 * Time: 9:30
 */
include_once 'functions.php';

class SrcVerifier
{
    var $md5_files = array();
    var $total = 0;

    public function scan($dir, $prefix_len, $excepts=array())
    {
        if ( $handle = opendir($dir) ) {
            while ( ($file = readdir($handle)) !== false ) {
                if ( $file != ".." && $file != "." && $file != ".svn" && $file!=".buildpath" && $file!=".htaccess" && $file!=".idea" && $file!=".project" && $file!=".settings") {
                    $real_location = $dir . "/" . $file;
                    $relative_location = substr($real_location, $prefix_len);
                    if ( is_dir($real_location) ) {
                        echo "[dir] - $relative_location [end]\n";
                        //$files[$file] = scandir($file_location);
                        if(!in_array($relative_location, $excepts)) {
                            $this->scan($real_location, $prefix_len, $excepts);
                        }
                    }else {
                        $this->md5_files[$relative_location] = md5_file($real_location);
                        echo "[file] - $relative_location , ".$this->md5_files[$relative_location]." \n";
                        $this->total++;
                    }
                }
            }
            closedir($handle);
        }
    }

    public function list_file($dir, $except_dirs = array())
    {
        $list = scandir($dir); // 得到该文件下的所有文件和文件夹
        foreach ($list as $file) {//遍历
            $file_location = $dir . "/" . $file;//生成路径
            if (is_dir($file_location) && $file != "." && $file != ".." && $file != ".svn") { //判断是不是文件夹
                echo "[dir] - $file_location \n";
                $this->list_file($file_location); //继续遍历
            } elseif (is_file($file_location)) {
                echo "[file] - $file_location \n";
                $this->total++;
            }

        }
    }

    public function total_files(){
        return $this->total;
    }
}

$root_path = 'd:/projects/php/test';
$start_time = microtime_float();

//step_1,扫描校验本地源文件，生成文件路径与其md5值之间的映射文件
$verifier = new SrcVerifier();
$verifier->scan($root_path, strlen($root_path), array('/data/files','/temp'));

file_put_contents('md5_files.php', '<?php return '.var_export($verifier->md5_files,true));//校验结果写入本地文件

//统计数据
$scan_local_time = microtime_float() - $start_time;
echo "scan files: ".$verifier->total_files()."\n";
echo "total cost: {$scan_local_time} secs.\n";

//step_2,遍历刚取下的源文件，并和本地的线上源文件进行md5校验，如果存在不一致的，则写入日志

//step_3,输出校验结果