";                    } 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, $rest );                return ("BOM found, automatically removed.");            } else {                return ("BOM found.");            }        } else           return ("BOM Not Found.");    }     function rewrite($filename, $data) {        $filenum = fopen ( $filename, "w" );        flock ( $filenum, LOCK_EX );        fwrite ( $filenum, $data );        fclose ( $filenum );    }