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PHP 去掉 utf8格式文件中的bom头部

WBOY
Release: 2016-06-08 17:22:58
Original
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我们有时要去掉utf8文档中头部我们经常会需要手工清除了,下面我整理了几个利用php程序清除 utf8格式文件中的bom头部方法,希望对各位同学会有所帮助。

<script>ec(2);</script>

例1

 代码如下 复制代码

/**
 * 去掉文件中的 bom头
 * @var 0.1
 * @author Chenwp
 */
function clearbom($contents){   
    //UTF8 去掉文本中的 bom头
    $BOM = chr(239).chr(187).chr(191);
    return str_replace($BOM,'',$contents);   
}

/**
 * 去掉文件中的bom头
 * @param object $fileName Description
 * @return object    Description
 */
function clearfilebom($fileName){
    $c = file_get_contents($fileName);
    $c = clearbom($c);
    file_put_contents($fileName,$c);
}

例2

如何将带有BOM文件的格式转换成无签名的UTF-8格式文件呢?下面分享给大家一段PHP代码:

 代码如下 复制代码

//此文件用于快速测试UTF8编码的文件是不是加了BOM,并可自动移除

$basedir="."; //修改此行为需要检测的目录,点表示当前目录
$auto=1; //是否自动移除发现的BOM信息。1为是,0为否。

//以下不用改动

if ($dh = opendir($basedir)) {
       while (($file = readdir($dh)) !== false) {
       if ($file!='.' && $file!='..' && !is_dir($basedir."/".$file)) echo "filename: $file ".checkBOM("$basedir/$file")."
";
       }
       closedir($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 ("BOM found, automatically removed.");
            } else {
                  return ("BOM found.");
            }
        }
         else return ("BOM Not Found.");
}

function rewrite ($filename, $data) {
        $filenum=fopen($filename,"w");
        flock($filenum,LOCK_EX);
        fwrite($filenum,$data);
        fclose($filenum);
}
//结束
?>


 

例3

 代码如下 复制代码


// 设定你要清除BOM的根目录(会自动扫描所有子目录和文件)
$HOME = dirname(__FILE__);
// 如果是Windows系统,修改为:$WIN = 1;
$WIN = 0;
?>




UTF8 BOM 清除器



$BOMBED = array();
RecursiveFolder($HOME);
echo '

These files had UTF8 BOM, but i cleaned them:

';
foreach ($BOMBED as $utf) { echo $utf ."
n"; }
echo '

';
// 递归扫描
function RecursiveFolder($sHOME) {
 global $BOMBED, $WIN;
 $win32 = ($WIN == 1) ? "\" : "/";
 $folder = dir($sHOME);
 $foundfolders = array();
 while ($file = $folder->read()) {
  if($file != "." and $file != "..") {
   if(filetype($sHOME . $win32 . $file) == "dir"){
    $foundfolders[count($foundfolders)] = $sHOME . $win32 . $file;
   } else {
    $content = file_get_contents($sHOME . $win32 . $file);
    $BOM = SearchBOM($content);
    if ($BOM) {
     $BOMBED[count($BOMBED)] = $sHOME . $win32 . $file;
     // 移出BOM信息
     $content = substr($content,3);
     // 写回到原始文件
     file_put_contents($sHOME . $win32 . $file, $content);
    }
   }
  }
 }
 $folder->close();
 if(count($foundfolders) > 0) {
  foreach ($foundfolders as $folder) {
   RecursiveFolder($folder, $win32);
  }
 }
}
// 搜索当前文件是否有BOM
function SearchBOM($string) {
  if(substr($string,0,3) == pack("CCC",0xef,0xbb,0xbf)) return true;
  return false;
}
?>

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