这个可是好东西，以后大家可能会用上哦：HTMLtoXHTMLConverter_PHP

Xhtml

if (!empty($type)) {
if ($type == "path") {
if (!empty($path)) {
if (file_exists($path) && is_file($path)) {
$file = file($path);
if (substr($file[0],0,9) != ") $doctype=0;
$file = join(', $file);
} else {
die ("No such file.");
}
} else {
die ("No file specified.");
}
} elseif ($type == "file") {
if (!empty($file)) {

} else {
die ("No file specified.");
}
} else {
die ("No file specified.");
}

# specify html file, check for doctype
//$file = file("file.html");
//if (substr($file[0],0,9) != ") $doctype=1;
//$file = join(', $file);

# make tags and properties lower case, close empty elements, quote all properties
$search = array ("'(]*>)'e",
"'(]*)( />)'ie",
"'(]*)(/>)'ie",
"'(]*)(>)'ie",
"'(\w+=)(\w+)'ie",
"'(\w+=)(.+?)'ie");
$replace = array ("'\\1'.strtolower('\\2').'\\3'",
"'\\1\\2\\3>'",
"'\\1\\2\\3>'",
"'\\1\\2\\3 /\\4'",
"strtolower('\\1').'\"\\2\"'",
"strtolower('\\1').'\\2'");
$file = preg_replace($search, $replace, $file);

# return xhtml-compliant document
echo ""; <br> if (isset($doctype)) echo ''."\n"; <br> echo stripslashes(stripslashes(stripslashes($file))); <br> echo "";

} else {
?>

File path:

OR

File contents: