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<?php

// constants are slow, so we use as few as possible

if (!defined('HTMLPURIFIER_PREFIX')) {

define('HTMLPURIFIER_PREFIX', realpath(dirname(__FILE__) . '/..'));

}

// accomodations for versions earlier than 5.0.2

// borrowed from PHP_Compat, LGPL licensed, by Aidan Lister <aidan@php.net>

if (!defined('PHP_EOL')) {

switch (strtoupper(substr(PHP_OS, 0, 3))) {

case 'WIN':

define('PHP_EOL', "\r\n");

break;

case 'DAR':

define('PHP_EOL', "\r");

break;

default:

define('PHP_EOL', "\n");

}

/**

* Bootstrap class that contains meta-functionality for HTML Purifier such as

* the autoload function.

* @note

*      This class may be used without any other files from HTML Purifier.

class HTMLPurifier_Bootstrap

{

/**

* Autoload function for HTML Purifier

* @param string $class Class to load

* @return bool

public static function autoload($class)

{

$file = HTMLPurifier_Bootstrap::getPath($class);

if (!$file) {

return false;

}

// Technically speaking, it should be ok and more efficient to

// just do 'require', but Antonio Parraga reports that with

// Zend extensions such as Zend debugger and APC, this invariant

// may be broken.  Since we have efficient alternatives, pay

// the cost here and avoid the bug.

require_once HTMLPURIFIER_PREFIX . '/' . $file;

return true;

}

/**

* Returns the path for a specific class.

* @param string $class Class path to get

* @return string

public static function getPath($class)

{

if (strncmp('HTMLPurifier', $class, 12) !== 0) {

return false;

}

// Custom implementations

if (strncmp('HTMLPurifier_Language_', $class, 22) === 0) {

$code = str_replace('_', '-', substr($class, 22));

$file = 'HTMLPurifier/Language/classes/' . $code . '.php';

} else {

$file = str_replace('_', '/', $class) . '.php';

}

if (!file_exists(HTMLPURIFIER_PREFIX . '/' . $file)) {

return false;

}

return $file;

}

/**

* "Pre-registers" our autoloader on the SPL stack.

public static function registerAutoload()

{

$autoload = array('HTMLPurifier_Bootstrap', 'autoload');

if (($funcs = spl_autoload_functions()) === false) {

spl_autoload_register($autoload);

} elseif (function_exists('spl_autoload_unregister')) {

if (version_compare(PHP_VERSION, '5.3.0', '>=')) {

// prepend flag exists, no need for shenanigans

spl_autoload_register($autoload, true, true);

} else {

$buggy  = version_compare(PHP_VERSION, '5.2.11', '<');

$compat = version_compare(PHP_VERSION, '5.1.2', '<=') &&

version_compare(PHP_VERSION, '5.1.0', '>=');

foreach ($funcs as $func) {

if ($buggy && is_array($func)) {

// :TRICKY: There are some compatibility issues and some

// places where we need to error out

$reflector = new ReflectionMethod($func[0], $func[1]);

if (!$reflector->isStatic()) {

throw new Exception(

'HTML Purifier autoloader registrar is not compatible

with non-static object methods due to PHP Bug #44144;

Please do not use HTMLPurifier.autoload.php (or any

file that includes this file); instead, place the code:

spl_autoload_register(array(\'HTMLPurifier_Bootstrap\', \'autoload\'))

after your own autoloaders.'

);

}

// Suprisingly, spl_autoload_register supports the

// Class::staticMethod callback format, although call_user_func doesn't

if ($compat) {

$func = implode('::', $func);

}

spl_autoload_unregister($func);

}

spl_autoload_register($autoload);

foreach ($funcs as $func) {

spl_autoload_register($func);

}

// vim: et sw=4 sts=4

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