<?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