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89 lines
2.5 KiB
PHP
89 lines
2.5 KiB
PHP
<?php
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/**
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* Registration spam prevention.
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*
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* @license GPL 3 (http://www.gnu.org/licenses/gpl.html)
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* @author Christoph M. Becker <cmb@php.net>
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*/
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// must be run within Dokuwiki
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if(!defined('DOKU_INC')) die();
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/**
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* The action class which is automatically instantiated by DokuWiki.
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*
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* @link https://www.dokuwiki.org/devel:action_plugins
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*/
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class action_plugin_phpreg extends DokuWiki_Action_Plugin
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{
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/**
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* Registers event handlers.
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*
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* @param Doku_Event_Handler $controller DokuWiki's event controller object.
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*
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* @return not required
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*/
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public function register(Doku_Event_Handler $controller)
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{
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$controller->register_hook(
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'HTML_REGISTERFORM_OUTPUT',
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'BEFORE',
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$this,
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'handle_registerform_output'
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);
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$controller->register_hook(
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'ACTION_ACT_PREPROCESS',
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'BEFORE',
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$this,
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'handle_act_preprocess',
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array()
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);
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}
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/**
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* custom event handler
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*
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* @param Doku_Event $event event object by reference
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* @param mixed $param the parameters passed to register_hook when this
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* handler was registered
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*
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* @return not required
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*/
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public function handle_registerform_output(Doku_Event &$event, $param)
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{
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$pos = $event->data->findElementByAttribute('type', 'submit');
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if (!$pos) return;
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$spam = isset($_POST['spam']) ? $_POST['spam'] : '';
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$out = form_makeTextField(
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'spam', $spam,
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'To which email address do you have to send an email to now?',
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'', 'block', array('size' => '50')
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);
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$event->data->insertElement($pos, $out);
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}
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/**
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* Checks the spam-prevention.
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*
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* @param Doku_Event $event event object by reference
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* @param mixed $param the parameters passed to register_hook when this
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* handler was registered
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*
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* @return not required
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*/
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public function handle_act_preprocess(Doku_Event &$event, $param)
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{
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$act = $event->data;
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if ($act != 'register' || !isset($_POST['save'])) {
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return;
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}
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$spam = isset($_POST['spam']) ? $_POST['spam'] : '';
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$spam = trim(preg_replace('/[\x00-\x1f:<>&%,;]+/', '', $spam));
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if ($spam != 'internals@lists.php.net') {
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msg("That wasn't the answer we were expecting", -1);
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$_POST['save'] = false;
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}
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}
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}
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