用PHP解决万恶的BOM

<?php$path = dirname(__FILE__);scandDir($path);function bomtoutf8($filename){$ef = 239;$bb = 187;$bf = 191;if (is_dir($filename)) return;$fd = fopen($filename, "rb");if (!$fd) exit($filename);$headers = fread($fd, 3);fclose($fd);if (strlen($headers) < 3) return;if (ord($headers[0]) == $ef && ord($headers[1]) == $bb &&ord($headers[2]) == $bf) {echo $filename, "\n";$content = file_get_contents($filename);if (!$content) {exit("file get contents failed");}$len = strlen($content);$content = substr($content, 3);if ($content === false && $len!=3) {exit("sbustr failed");} else if ($content === false && $len==3){$content = "";}$ret = file_put_contents($filename, $content, LOCK_EX);if ($ret === false) {exit("file put contents failed");}echo "successed file ", $filename, "\n";}}function scandDir($path){$d = dir($path);if (!$d) exit("dir failed");while (false !== ($entry = $d->read())) {if ($entry == '.' || $entry == '..') {continue;}$filename = $path . DIRECTORY_SEPARATOR . $entry;//echo $filename, "\n";if (is_dir($filename)) {scandDir($filename);} else {bomtoutf8($filename);}}}

友情提示：代码是批量处理目录下（包括子目录）的所有带BOM文件，使用前需备份