php 批量去除项目文件bom头

 1 <?php
 2 if (isset($_GET['dir'])) { //设置文件目录 
 3     $basedir = $_GET['dir'];
 4 } else {
 5     $basedir = '.';
 6 }
 7 
 8 $auto = 1;
 9 checkdir($basedir);
10 
11 function checkdir($basedir)
12 {
13     if ($dh = opendir($basedir)) {
14         while (($file = readdir($dh)) !== false) {
15             if ($file != '.' && $file != '..') {
16                 if (!is_dir($basedir . "/" . $file)) {
17                     echo "filename: $basedir/$file " . checkBOM("$basedir/$file") . " <br>";
18                 } else {
19                     $dirname = $basedir . "/" . $file;
20                     checkdir($dirname);
21                 }
22             }
23         }
24         closedir($dh);
25     }
26 }
27 
28 function checkBOM($filename)
29 {
30     global $auto;
31     $contents = file_get_contents($filename);
32     $charset[1] = substr($contents, 0, 1);
33     $charset[2] = substr($contents, 1, 1);
34     $charset[3] = substr($contents, 2, 1);
35     if (ord($charset[1]) == 239 && ord($charset[2]) == 187 && ord($charset[3]) == 191) {
36         if ($auto == 1) {
37             $rest = substr($contents, 3);
38             rewrite($filename, $rest);
39             return ("<font color='red'>BOM found, automatically removed.</font>");
40         } else {
41             return ("<font color='red'>BOM found.</font>");
42         }
43     } else
44         return ("BOM Not Found.");
45 }
46 
47 function rewrite($filename, $data)
48 {
49     $filenum = fopen($filename, "w");
50     flock($filenum, LOCK_EX);
51     fwrite($filenum, $data);
52     fclose($filenum);
53 }
54 
55 ?>