苗火 Nicholas

[php]将服务器文件BOM头删除

2018-5-8 萧 写技术

以下一段PHP代码可以将服务器上文件的BOM头删除:

<?php   
 if (isset($_GET['dir'])){    
 $basedir=$_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, $rest);   
    return ("<font color=red>BOM found, automatically removed._<a href=http://www.hengidc.com>http://www.hengidc.com</a></font>");   
   } else {   
    return ("<font color=red>BOM found.</font>");   
   }   
 }   
 else return ("BOM Not Found.");   
 }   
 function rewrite ($filename, $data) {   
 $filenum = fopen($filename, "w");   
 flock($filenum, LOCK_EX);   
 fwrite($filenum, $data);   
 fclose($filenum);   
 }   
 ?> 

标签: php