因为文件头信息输出BOM头信息,有时会对程序的执行结果造成影响,那么此时即应对这些文件的BOM信息进行去除。
如下代码为PHP方式去除当前目录及子目录所有文件BOM信息的代码,新建文件,将其放倒根目录下,然后浏览器访问即可。
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 | <?php if (isset( $_GET [ 'dir' ])) { //设置文件目录 $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._<a href=" http: //lzw.me" target="_blank" rel="nofollow">http://lzw.me</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 ); } ?> |
学习了 :grin: