Applies allowing HTML tags with the KSES filter.

test-kses-allow-tags.php

<?php
/*
  Plugin Name: Test - Kses Allow Tags
	Plugin URI:
	Description:
	Version: 0.0.0.1
	Author: Michael Uno
	Author URI: http://michaeluno.jp
*/

if ( !class_exists( 'Admin_Page_Framework' ) )
    include_once( dirname( __FILE__ ) . '/classes/admin-page-framework.php' );
	
class KsesAllowTags extends Admin_Page_Framework {

	function SetUp() {
		$this->SetRootMenu( 'Settings' );               
		$this->AddSubMenu(  'Test Kses Allow Tags',   
							'test_kses_allow_tags' ); 							
	}

	function do_test_kses_allow_tags() {  // do_ + pageslug
		
$string = <<<STRING
<noscript>foo</noscript><style><strong>bar</strong></style>
STRING;

		// allows noscript and style tags
		$string = $this->custom_wp_filter_post_kses( $string, array( 'noscript' => array(), 'style' => array() ) );
		echo '<pre>' . htmlspecialchars( $string ) . '</pre>';
		
	}

	function custom_wp_filter_post_kses( $string, $arrAllowedTags, $allowed_protocols = array() ) {
		global $allowedposttags;
		$allowed_html = array_replace_recursive( $allowedposttags, $arrAllowedTags );
		if ( empty( $allowed_protocols ) )
			$allowed_protocols = wp_allowed_protocols();			
		$string = addslashes( $string );					// the original function call was doing this - could be redundant but haven't fully tested it
		$string = stripslashes( $string );					// wp_filter_post_kses()
		$string = wp_kses_no_null( $string );				// wp_kses()
		$string = wp_kses_js_entities( $string );			// wp_kses()
		$string = wp_kses_normalize_entities( $string );	// wp_kses()
		$string = wp_kses_hook( $string, $allowed_html, $allowed_protocols ); // WP changed the order of these funcs and added args to wp_kses_hook
		$string = wp_kses_split( $string, $allowed_html, $allowed_protocols );		
		$string = addslashes( $string );				// wp_filter_post_kses()
		$string = stripslashes( $string );				// the original function call was doing this - could be redundant but haven't fully tested it
		return $string;
	}
	
}
new KsesAllowTags();