mirror of
https://github.com/kennethreitz-archive/wordpress-skeleton.git
synced 2026-06-05 23:50:19 +00:00
Kenneth Reitz
676 lines
20 KiB
PHP
676 lines
20 KiB
PHP
<?php
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// ======================================================================================
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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// ======================================================================================
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// @author John Godley (http://urbangiraffe.com)
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// @version 0.1.25
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// @copyright Copyright © 2007 John Godley, All Rights Reserved
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// ======================================================================================
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// 0.1.6 - Corrected WP locale functions
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// 0.1.7 - Add phpdoc comments
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// 0.1.8 - Support for Admin SSL
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// 0.1.9 - URL encoding, defer localization until init
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// 0.1.10 - Better URL encoding
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// 0.1.11 - Make work in WP 2.0, fix HTTPS issue on IIS
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// 0.1.12 - Activation/deactivation actions that take into account the directory
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// 0.1.13 - Add realpath function
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// 0.1.14 - Add select/checked functions, fix locale loader
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// 0.1.15 - Remove dependency on prototype
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// 0.1.16 - Add support for homedir in realpath
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// 0.1.17 - Added widget class
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// 0.1.18 - Expand checked function
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// 0.1.19 - Make url() cope with sites with no trailing slash
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// 0.1.20 - Change init function to prevent overloading
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// 0.1.21 - Make widget work for WP 2.1
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// 0.1.22 - Make select work with option groups, RSS compatability fix
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// 0.1.23 - Make widget count work better, fix widgets in K2
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// 0.1.24 - Make realpath better
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// 0.1.25 - Support for new WP2.6 config location
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// ======================================================================================
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/**
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* Wraps up several useful functions for WordPress plugins and provides a method to separate
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* display HTML from PHP code.
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*
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* <h4>Display Rendering</h4>
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* The class uses a similar technique to Ruby On Rails views, whereby the display HTML is kept
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* in a separate directory and file from the main code. A display is 'rendered' (sent to the browser)
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* or 'captured' (returned to the calling function).
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*
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* Template files are separated into two areas: admin and user. Admin templates are only for display in
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* the WordPress admin interface, while user templates are typically for display on the site (although neither
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* of these are enforced). All templates are PHP code, but are referred to without .php extension.
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*
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* The reason for this separation is that one golden rule of plugin creation is that someone will always want to change
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* the formatting and style of your output. Rather than forcing them to modify the plugin (bad), or modify files within
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* the plugin (equally bad), the class allows user templates to be overridden with files contained within the theme.
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*
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* An additional benefit is that it leads to code re-use, especially with regards to Ajax (i.e. your display code can be called from
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* many locations)
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*
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* Template files are located within the 'view' subdirectory of the plugins base (specified when registering the plugin):
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*
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* <pre>myplugin/view/admin
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* myplugin/view/myplugin</pre>
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*
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* Admin templates are contained within 'admin', and user templates are contained within a directory of the same name as the plugin.
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*
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* User files can be overridden within the theme by creating a similar directory structure:
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*
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* <pre>/themes/mytheme/view/myplugin</pre>
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*
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* The class will first look in the theme and then defaults to the plugin. A plugin should always provide default templates.
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*
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* <h4>Display Parameters</h4>
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* Also similar to Ruby On Rails, when you display a template you must supply the parameters that the template has access to. This tries
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* to ensure a very clean separation between code and display. Parameters are supplied as an associative array mapping variable name to variable value.
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*
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* For example,
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*
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* array ('message' => 'Your data was processed', 'items' => 103);
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*
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* <h4>How it works in practice</h4>
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* You create a template file to display how many items have been processed. You store this in 'view/admin/processed.php':
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*
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* <pre><p>You processed <?php echo $items ?> items</p></pre>
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*
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* When you want to display this in your plugin you use:
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*
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* <pre> $this->render_admin ('processed', array ('items' => 100));
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*
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* @package WordPress base library
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* @author John Godley
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* @copyright Copyright (C) John Godley
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**/
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class CustomPostTemplates_Plugin
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{
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/**
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* Plugin name
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* @var string
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**/
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var $plugin_name;
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/**
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* Plugin 'view' directory
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* @var string Directory
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**/
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var $plugin_base;
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/**
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* Register your plugin with a name and base directory. This <strong>must</strong> be called once.
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*
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* @param string $name Name of your plugin. Is used to determine the plugin locale domain
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* @param string $base Directory containing the plugin's 'view' files.
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* @return void
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**/
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function register_plugin ($name, $base)
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{
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$this->plugin_base = rtrim (dirname ($base), '/');
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$this->plugin_name = $name;
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$this->add_action ('init', 'load_locale');
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}
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function load_locale ()
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{
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// Here we manually fudge the plugin locale as WP doesnt allow many options
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$locale = get_locale ();
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if ( empty($locale) )
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$locale = 'en_US';
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$mofile = dirname (__FILE__)."/locale/$locale.mo";
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load_textdomain ($this->plugin_name, $mofile);
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}
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/**
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* Register a WordPress action and map it back to the calling object
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*
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* @param string $action Name of the action
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* @param string $function Function name (optional)
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* @param int $priority WordPress priority (optional)
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* @param int $accepted_args Number of arguments the function accepts (optional)
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* @return void
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**/
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function add_action ($action, $function = '', $priority = 10, $accepted_args = 1)
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{
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add_action ($action, array (&$this, $function == '' ? $action : $function), $priority, $accepted_args);
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}
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/**
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* Register a WordPress filter and map it back to the calling object
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*
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* @param string $action Name of the action
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* @param string $function Function name (optional)
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* @param int $priority WordPress priority (optional)
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* @param int $accepted_args Number of arguments the function accepts (optional)
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* @return void
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**/
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function add_filter ($filter, $function = '', $priority = 10, $accepted_args = 1)
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{
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add_filter ($filter, array (&$this, $function == '' ? $filter : $function), $priority, $accepted_args);
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}
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/**
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* Register a WordPress meta box
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*
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* @param string $id ID for the box, also used as a function name if none is given
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* @param string $title Title for the box
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* @param int $page WordPress priority (optional)
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* @param string $function Function name (optional)
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* @param string $context e.g. 'advanced' or 'core' (optional)
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* @param int $priority Priority, rough effect on the ordering (optional)
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* @return void
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**/
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function add_meta_box($id, $title, $function = '', $page, $context = 'advanced', $priority = 'default')
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{
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require_once( ABSPATH . 'wp-admin/includes/template.php' );
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add_meta_box( $id, $title, array( &$this, $function == '' ? $id : $function ), $page, $context, $priority );
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}
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/**
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* Special activation function that takes into account the plugin directory
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*
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* @param string $pluginfile The plugin file location (i.e. __FILE__)
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* @param string $function Optional function name, or default to 'activate'
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* @return void
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**/
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function register_activation ($pluginfile, $function = '')
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{
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add_action ('activate_'.basename (dirname ($pluginfile)).'/'.basename ($pluginfile), array (&$this, $function == '' ? 'activate' : $function));
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}
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/**
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* Special deactivation function that takes into account the plugin directory
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*
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* @param string $pluginfile The plugin file location (i.e. __FILE__)
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* @param string $function Optional function name, or default to 'deactivate'
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* @return void
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**/
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function register_deactivation ($pluginfile, $function = '')
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{
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add_action ('deactivate_'.basename (dirname ($pluginfile)).'/'.basename ($pluginfile), array (&$this, $function == '' ? 'deactivate' : $function));
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}
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/**
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* Renders an admin section of display code
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*
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* @param string $ug_name Name of the admin file (without extension)
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* @param string $array Array of variable name=>value that is available to the display code (optional)
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* @return void
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**/
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function render_admin ($ug_name, $ug_vars = array ())
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{
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global $plugin_base;
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foreach ($ug_vars AS $key => $val)
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$$key = $val;
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if (file_exists ("{$this->plugin_base}/view/admin/$ug_name.php"))
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include ("{$this->plugin_base}/view/admin/$ug_name.php");
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else
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echo "<p>Rendering of admin template {$this->plugin_base}/view/admin/$ug_name.php failed</p>";
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}
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/**
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* Renders a section of user display code. The code is first checked for in the current theme display directory
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* before defaulting to the plugin
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*
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* @param string $ug_name Name of the admin file (without extension)
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* @param string $array Array of variable name=>value that is available to the display code (optional)
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* @return void
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**/
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function render ($ug_name, $ug_vars = array ())
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{
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foreach ($ug_vars AS $key => $val)
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$$key = $val;
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if (file_exists (TEMPLATEPATH."/view/{$this->plugin_name}/$ug_name.php"))
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include (TEMPLATEPATH."/view/{$this->plugin_name}/$ug_name.php");
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else if (file_exists ("{$this->plugin_base}/view/{$this->plugin_name}/$ug_name.php"))
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include ("{$this->plugin_base}/view/{$this->plugin_name}/$ug_name.php");
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else
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echo "<p>Rendering of template $ug_name.php failed</p>";
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}
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/**
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* Renders a section of user display code. The code is first checked for in the current theme display directory
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* before defaulting to the plugin
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*
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* @param string $ug_name Name of the admin file (without extension)
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* @param string $array Array of variable name=>value that is available to the display code (optional)
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* @return void
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**/
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function capture ($ug_name, $ug_vars = array ())
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{
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ob_start ();
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$this->render ($ug_name, $ug_vars);
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$output = ob_get_contents ();
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ob_end_clean ();
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return $output;
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}
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/**
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* Captures an admin section of display code
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*
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* @param string $ug_name Name of the admin file (without extension)
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* @param string $array Array of variable name=>value that is available to the display code (optional)
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* @return string Captured code
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**/
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function capture_admin ($ug_name, $ug_vars = array ())
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{
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ob_start ();
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$this->render_admin ($ug_name, $ug_vars);
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$output = ob_get_contents ();
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ob_end_clean ();
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return $output;
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}
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/**
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* Display a standard error message (using CSS ID 'message' and classes 'fade' and 'error)
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*
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* @param string $message Message to display
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* @return void
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**/
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function render_error ($message)
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{
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?>
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<div class="fade error" id="message">
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<p><?php echo $message ?></p>
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</div>
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<?php
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}
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/**
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* Display a standard notice (using CSS ID 'message' and class 'updated').
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* Note that the notice can be made to automatically disappear, and can be removed
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* by clicking on it.
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*
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* @param string $message Message to display
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* @param int $timeout Number of seconds to automatically remove the message (optional)
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* @return void
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**/
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function render_message ($message, $timeout = 0)
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{
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?>
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<div class="updated" id="message" onclick="this.parentNode.removeChild (this)">
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<p><?php echo $message ?></p>
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</div>
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<?php
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}
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/**
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* Get the plugin's base directory
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*
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* @return string Base directory
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**/
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function dir ()
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{
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return $this->plugin_base;
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}
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/**
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* Get a URL to the plugin. Useful for specifying JS and CSS files
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*
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* For example, <img src="<?php echo $this->url () ?>/myimage.png"/>
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*
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* @return string URL
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**/
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function url ($url = '')
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{
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if ($url)
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return str_replace ('\\', urlencode ('\\'), str_replace ('&amp', '&', str_replace ('&', '&', $url)));
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else
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{
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$root = ABSPATH;
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if (defined ('WP_PLUGIN_DIR'))
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$root = WP_PLUGIN_DIR;
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$url = substr ($this->plugin_base, strlen ($this->realpath ($root)));
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if (DIRECTORY_SEPARATOR != '/')
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$url = str_replace (DIRECTORY_SEPARATOR, '/', $url);
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if (defined ('WP_PLUGIN_URL'))
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$url = WP_PLUGIN_URL.'/'.ltrim ($url, '/');
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else
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$url = get_bloginfo ('wpurl').'/'.ltrim ($url, '/');
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// Do an SSL check - only works on Apache
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global $is_IIS;
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if (isset ($_SERVER['HTTPS']) && !$is_IIS)
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$url = str_replace ('http://', 'https://', $url);
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}
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return $url;
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}
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/**
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* Performs a version update check using an RSS feed. The function ensures that the feed is only
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* hit once every given number of days, and the data is cached using the WordPress Magpie library
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*
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* @param string $url URL of the RSS feed
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* @param int $days Number of days before next check
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* @return string Text to display
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**/
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function version_update ($url, $days = 7)
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{
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if (!function_exists ('fetch_rss'))
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{
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if (!file_exists (ABSPATH.'wp-includes/rss.php'))
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return '';
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include (ABSPATH.'wp-includes/rss.php');
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}
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$now = time ();
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$checked = get_option ('plugin_urbangiraffe_rss');
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// Use built-in Magpie caching
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if (function_exists ('fetch_rss') && (!isset ($checked[$this->plugin_name]) || $now > $checked[$this->plugin_name] + ($days * 24 * 60 * 60)))
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{
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$rss = fetch_rss ($url);
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if (count ($rss->items) > 0)
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{
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foreach ($rss->items AS $pos => $item)
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{
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if (isset ($checked[$this->plugin_name]) && strtotime ($item['pubdate']) < $checked[$this->plugin_name])
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unset ($rss->items[$pos]);
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}
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}
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$checked[$this->plugin_name] = $now;
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update_option ('plugin_urbangiraffe_rss', $checked);
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return $rss;
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}
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}
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/**
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* Version of realpath that will work on systems without realpath
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*
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* @param string $path The path to canonicalize
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* @return string Canonicalized path
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**/
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function realpath ($path)
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{
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if (function_exists ('realpath'))
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return realpath ($path);
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else if (DIRECTORY_SEPARATOR == '/')
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{
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$path = preg_replace ('/^~/', $_SERVER['DOCUMENT_ROOT'], $path);
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// canonicalize
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$path = explode (DIRECTORY_SEPARATOR, $path);
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$newpath = array ();
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for ($i = 0; $i < sizeof ($path); $i++)
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{
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if ($path[$i] === '' || $path[$i] === '.')
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continue;
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if ($path[$i] === '..')
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{
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array_pop ($newpath);
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continue;
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}
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array_push ($newpath, $path[$i]);
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}
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$finalpath = DIRECTORY_SEPARATOR.implode (DIRECTORY_SEPARATOR, $newpath);
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return $finalpath;
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}
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return $path;
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}
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function checked ($item, $field = '')
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{
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if ($field && is_array ($item))
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{
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if (isset ($item[$field]) && $item[$field])
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echo ' checked="checked"';
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}
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else if (!empty ($item))
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echo ' checked="checked"';
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}
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function select ($items, $default = '')
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{
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if (count ($items) > 0)
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{
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foreach ($items AS $key => $value)
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{
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if (is_array ($value))
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{
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echo '<optgroup label="'.$key.'">';
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foreach ($value AS $sub => $subvalue)
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echo '<option value="'.$sub.'"'.($sub == $default ? ' selected="selected"' : '').'>'.$subvalue.'</option>';
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echo '</optgroup>';
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}
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else
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echo '<option value="'.$key.'"'.($key == $default ? ' selected="selected"' : '').'>'.$value.'</option>';
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}
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}
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}
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}
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if (!function_exists ('pr'))
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{
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function pr ($thing)
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{
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echo '<pre>';
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print_r ($thing);
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echo '</pre>';
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}
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}
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if (!class_exists ('Widget_SU'))
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{
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class Widget_SU
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{
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function Widget_SU ($name, $max = 1, $id = '', $args = '')
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{
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$this->name = $name;
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$this->id = $id;
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$this->widget_max = $max;
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$this->args = $args;
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if ($this->id == '')
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$this->id = strtolower (preg_replace ('/[^A-Za-z]/', '-', $this->name));
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$this->widget_available = 1;
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if ($this->widget_max > 1)
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{
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$this->widget_available = get_option ('widget_available_'.$this->id ());
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if ($this->widget_available === false)
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$this->widget_available = 1;
|
|
}
|
|
|
|
add_action ('init', array (&$this, 'initialize'));
|
|
}
|
|
|
|
function initialize ()
|
|
{
|
|
// Compatability functions for WP 2.1
|
|
if (!function_exists ('wp_register_sidebar_widget'))
|
|
{
|
|
function wp_register_sidebar_widget ($id, $name, $output_callback, $classname = '')
|
|
{
|
|
register_sidebar_widget($name, $output_callback, $classname);
|
|
}
|
|
}
|
|
|
|
if (!function_exists ('wp_register_widget_control'))
|
|
{
|
|
function wp_register_widget_control($name, $control_callback, $width = 300, $height = 200)
|
|
{
|
|
register_widget_control($name, $control_callback, $width, $height);
|
|
}
|
|
}
|
|
|
|
if (function_exists ('wp_register_sidebar_widget'))
|
|
{
|
|
if ($this->widget_max > 1)
|
|
{
|
|
add_action ('sidebar_admin_setup', array (&$this, 'setup_save'));
|
|
add_action ('sidebar_admin_page', array (&$this, 'setup_display'));
|
|
}
|
|
|
|
$this->load_widgets ();
|
|
}
|
|
}
|
|
|
|
function load_widgets ()
|
|
{
|
|
for ($pos = 1; $pos <= $this->widget_max; $pos++)
|
|
{
|
|
wp_register_sidebar_widget ($this->id ($pos), $this->name ($pos), $pos <= $this->widget_available ? array (&$this, 'show_display') : '', $this->args (), $pos);
|
|
|
|
if ($this->has_config ())
|
|
wp_register_widget_control ($this->id ($pos), $this->name ($pos), $pos <= $this->widget_available ? array (&$this, 'show_config') : '', $this->args (), $pos);
|
|
}
|
|
}
|
|
|
|
function args ()
|
|
{
|
|
if ($this->args)
|
|
return $args;
|
|
return array ('classname' => '');
|
|
}
|
|
|
|
function name ($pos)
|
|
{
|
|
if ($this->widget_available > 1)
|
|
return $this->name.' ('.$pos.')';
|
|
return $this->name;
|
|
}
|
|
|
|
function id ($pos = 0)
|
|
{
|
|
if ($pos == 0)
|
|
return $this->id;
|
|
return $this->id.'-'.$pos;
|
|
}
|
|
|
|
function show_display ($args, $number = 1)
|
|
{
|
|
$config = get_option ('widget_config_'.$this->id ($number));
|
|
if ($config === false)
|
|
$config = array ();
|
|
|
|
$this->load ($config);
|
|
$this->display ($args);
|
|
}
|
|
|
|
function show_config ($position)
|
|
{
|
|
if (isset ($_POST['widget_config_save_'.$this->id ($position)]))
|
|
{
|
|
$data = $_POST[$this->id ()];
|
|
if (count ($data) > 0)
|
|
{
|
|
$newdata = array ();
|
|
foreach ($data AS $item => $values)
|
|
$newdata[$item] = $values[$position];
|
|
$data = $newdata;
|
|
}
|
|
|
|
update_option ('widget_config_'.$this->id ($position), $this->save ($data));
|
|
}
|
|
|
|
$options = get_option ('widget_config_'.$this->id ($position));
|
|
if ($options === false)
|
|
$options = array ();
|
|
|
|
$this->config ($options, $position);
|
|
echo '<input type="hidden" name="widget_config_save_'.$this->id ($position).'" value="1" />';
|
|
}
|
|
|
|
function has_config () { return false; }
|
|
function save ($data)
|
|
{
|
|
return array ();
|
|
}
|
|
|
|
function setup_save ()
|
|
{
|
|
if (isset ($_POST['widget_setup_save_'.$this->id ()]))
|
|
{
|
|
$this->widget_available = intval ($_POST['widget_setup_count_'.$this->id ()]);
|
|
if ($this->widget_available < 1)
|
|
$this->widget_available = 1;
|
|
else if ($this->widget_available > $this->widget_max)
|
|
$this->widget_available = $this->widget_max;
|
|
|
|
update_option ('widget_available_'.$this->id (), $this->widget_available);
|
|
|
|
$this->load_widgets ();
|
|
}
|
|
}
|
|
|
|
function config_name ($field, $pos)
|
|
{
|
|
return $this->id ().'['.$field.']['.$pos.']';
|
|
}
|
|
|
|
function setup_display ()
|
|
{
|
|
?>
|
|
<div class="wrap">
|
|
<form method="post">
|
|
<h2><?php echo $this->name ?></h2>
|
|
<p style="line-height: 30px;"><?php _e('How many widgets would you like?', $this->id); ?>
|
|
<select name="widget_setup_count_<?php echo $this->id () ?>" value="<?php echo $options; ?>">
|
|
<?php for ( $i = 1; $i <= $this->widget_max; ++$i ) : ?>
|
|
<option value="<?php echo $i ?>"<?php if ($this->widget_available == $i) echo ' selected="selected"' ?>><?php echo $i ?></option>
|
|
<?php endfor; ?>
|
|
</select>
|
|
<span class="submit">
|
|
<input type="submit" name="widget_setup_save_<?php echo $this->id () ?>" value="<?php echo attribute_escape(__('Save', $this->id)); ?>" />
|
|
</span>
|
|
</p>
|
|
</form>
|
|
</div>
|
|
<?php
|
|
}
|
|
}
|
|
}
|
|
?>
|