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：

<?phpheader('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。<?phpif (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 );}?>