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($headers)
if (ord($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);
}
}
}

$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)

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