去UTF-8文件的BOM的PHP代码 支持当前目录及子目录所有文件

<?php
//remove the utf-8 boms
//by magicbug at gmail dot com
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);
}
?>

把代码存为PHP文件,然后放到主机里面,直接运行即可,程序会自动搜索本地所有文件,包括当前目录及子目录!如果只想清除某个目录下面的文件就把本文件放到要清除的目录下面运行即可!