How can I get the WordPress language_attributes function to return valid XHTML 1.1?
I have a WordPress template that contains the following element:
<html xmlns="http://www.w3.org/1999/xhtml" <?php language_attributes('xhtml'); ?>>
This returns:
<html xmlns="http://www.w3.org/1999/xhtml" dir="ltr" lang="en-US" xml:lang="en-US">
Unfortunately the "lang" attribute is invalid XHTML 1.1 - and the client would like this level of validation.
WordPress' general-template.php file contains the following code:
if ( get_option('html_type') == 'text/html' || $doctype == 'html' )
$attributes[] = "lang=\"$lang\"";
$doctype is the parameter passed to it (in this case 'xhtml'). Should get_option be returning a value other than 'text/html'? If so, what should I be setting in WordPress to achieve this - if anything?
I've also tried using preg_replace to take out the "lang" attribute, but this didn't seem to be able to match the text. If I enter the text manually, it matches! Possibly an encoding issue with the string being returned by language_attributes?
Answer
I solved this. There's a "language_attributes" filter, so I wrote a plugin that hooks into that and does a simple preg_replace. The replace worked when performed here, and it's a pretty neat way to handle it.
EDIT
As requested, here's the code I used:
<?php
/*
Plugin Name: Create Valid XHTML 1.1
Plugin URI: http://www.mycompany.com/create_valid_xhtml_1_1
Description: Removes deprecated "lang" attribute from (X)HTML header.
Author: dommer
Version: 1.0.0
Author URI: http://www.mycompany.com
*/
function create_valid_xhtml_1_1($language_attributes)
{
return preg_replace('/ lang=\"[a-z]+\-[A-Z]+\"/', '', $language_attributes);
}
add_filter('language_attributes', 'create_valid_xhtml_1_1');
?>