PHP批量删除、清除UTF-8文件BOM头的代码实例

记得运行代码前先把文件备份一下哦，避免出现失败问题。

代码一：

      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.");
      }

代码二：

    <?php
    header('content-Type: text/html; charset=utf-8');
    if(isset($_GET['dir'])){ //设置文件目录，如果没有设置，则自动设置为当前文件所在目录
      $basedir=$_GET['dir'];
    }else{
      $basedir='.';
    }
    $auto=1;/*设置为1标示检测BOM并去除，设置为0标示只进行BOM检测，不去除*/

    echo '当前查找的目录为：'.$basedir.'当前的设置是：';
    echo $auto?'检测文件BOM同时去除检测到BOM文件的BOM<br />':'只检测文件BOM不执行去除BOM操作<br />';

    checkdir($basedir);
    function checkdir($basedir){
      if($dh=opendir($basedir)){
        while (($file=readdir($dh)) !== false){
          if($file != '.' && $file != '..'){
            if(!is_dir($basedir.'/'.$file)){
              echo '文件: '.$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>找到BOM并已自动去除</font>');
        }else{
          return (' <font color=red>找到BOM</font>');
        }
      }else{
        return (' 没有找到BOM');
      }
    }
    function rewrite($filename,$data){
      $filenum=fopen($filename,'w');
      flock($filenum,LOCK_EX);
      fwrite($filenum,$data);
      fclose($filenum);
    }
    ?>

代码三：

    ##把该文件放在需求去除BOM头的目录下跑一下却可。
    <?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 )) { // 如果是文件
              echo "filename: $basedir/$file " . checkBOM ( "$basedir/$file" ) . " <br>";
            } else {
              $dirname = $basedir . "/" . $file; // 如果是目录
              checkdir ( $dirname ); // 递归
            }
          }
        }
        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 ( $charset [3] ) == 191) { // BOM
                                                       // 的前三个字符的ASCII
                                                       // 码分别为
                                                       // 239
                                                       // 187
                                                       // 191
        if ($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 );
    }
    ?>

二、Python

    #!/usr/bin/env python
    #-*- coding: utf-8 -*-

    import os

    def delBOM():
     file_count = 0
     bom_files = []

     for dirpath, dirnames, filenames in os.walk('.'):
     if(len(filenames)):
      for filename in filenames:
      file_count += 1
      file = open(dirpath + "/" + filename, 'r+')
      file_contents = file.read()

      if(len(file_contents) > 3):
       if(ord(file_contents[0]) == 239 and ord(file_contents[1]) == 187 and ord(file_contents[2]) == 191):
       bom_files.append(dirpath + "/" + filename)
       file.seek(0)
       file.write(file_contents[3:])
       print bom_files[-1], "BOM found. Deleted."
      file.close()

     print file_count, "file(s) found.", len(bom_files), "file(s) have a bom. Deleted."

    if __name__ == "__main__":
     delBOM()

为了方便大家使用，这里脚本之家小编分享一个BOM工具方便大家检测。

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