删除PHP文件中的BOM字符

BOM是微软搞出来的,比如如果你用windows上面的记事本程序,另存一个文本文件为utf-8编码,那么在文件头就加上了BOM(0xEF 0xBB 0xBF,即BOM),用来鉴别文件编码格式,但是这在html中就是一行啊,我们在Windows上面写php很容易就加上了BOM。下面是一个脚本,专门用来清除BOM的。

<?php

//remove the utf-8 boms

//by magicbug at gmail dot com

if (isset($_GET['dir'])){ //要去除的文件目录,无参数则为文件当前目录。

$basedir=$_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);

}

?>

Flag Counter