Thinkphp 去除bom头 解决模版空输出问题

<?php

if (isset($_GET['dir'])){ //config the basedir

  $basedir=$_GET['dir'];

}else{

  $basedir = '.';

}

$auto = 1;

checkdir($basedir);

function checkdir($basedir){

  if ($dh = opendir($basedir)) {

    while (($file = readdir($dh)) !== false) {

      if ($file != '.' && $file != '..'){

        if (!is_dir($basedir."/".$file)) {

          echo "filename: $basedir/

$file ".checkBOM("$basedir/$file")." <br>";

        }else{

          $dirname = $basedir."/".

$file;

          checkdir($dirname);

        }

      }

    }

  closedir($dh);

  }

}

function checkBOM ($filename) {

  global $auto;

  $contents = file_get_contents($filename);

  $charset[1] = substr($contents, 0, 1);

  $charset[2] = substr($contents, 1, 1);

  $charset[3] = substr($contents, 2, 1);

  if (ord($charset[1]) == 239 && ord($charset[2]) == 187 && ord($charset[3]) == 191) {

    if ($auto == 1) {

      $rest = substr($contents, 3);

      rewrite ($filename, $rest);

      return ("<font color=red>BOM found,automatically removed.</font>");

    } else {

      return ("<font color=red>BOM found.</font>");

    }

  }

  else return ("BOM Not Found.");

}

function rewrite ($filename, $data) {

  $filenum = fopen($filename, "w");

  flock($filenum, LOCK_EX);

  fwrite($filenum, $data);

  fclose($filenum);

}

?>