polylang / polylang.php

polylang.php in Polylang 1.5, at polylang.php

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1	<?php
2	/*
3	Plugin Name: Polylang
4	Plugin URI: http://polylang.wordpress.com/
5	Version: 1.5
6	Author: Frédéric Demarle
7	Description: Adds multilingual capability to WordPress
8	Text Domain: polylang
9	Domain Path: /languages
10	*/
11
12	/*
13	* Copyright 2011-2014 Frédéric Demarle
14	*
15	* This program is free software; you can redistribute it and/or modify
16	* it under the terms of the GNU General Public License as published by
17	* the Free Software Foundation; either version 2 of the License, or
18	* (at your option) any later version.
19	*
20	* This program is distributed in the hope that it will be useful,
21	* but WITHOUT ANY WARRANTY; without even the implied warranty of
22	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23	* GNU General Public License for more details.
24	*
25	* You should have received a copy of the GNU General Public License
26	* along with this program; if not, write to the Free Software
27	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
28	* MA 02110-1301, USA.
29	*
30	*/
31
32	// don't access directly
33	if (!function_exists('add_action'))
34	exit();
35
36	define('POLYLANG_VERSION', '1.5');
37	define('PLL_MIN_WP_VERSION', '3.5');
38
39	define('POLYLANG_BASENAME', plugin_basename(__FILE__)); // plugin name as known by WP
40
41	define('POLYLANG_DIR', dirname(__FILE__)); // our directory
42	define('PLL_INC', POLYLANG_DIR . '/include');
43	define('PLL_FRONT_INC', POLYLANG_DIR . '/frontend');
44	define('PLL_ADMIN_INC', POLYLANG_DIR . '/admin');
45
46	// default directory to store user data such as custom flags
47	if (!defined('PLL_LOCAL_DIR'))
48	define('PLL_LOCAL_DIR', WP_CONTENT_DIR . '/polylang');
49
50	// includes local config file if exists
51	if (file_exists(PLL_LOCAL_DIR . '/pll-config.php'))
52	include_once(PLL_LOCAL_DIR . '/pll-config.php');
53
54	// our url. Don't use WP_PLUGIN_URL http://wordpress.org/support/topic/ssl-doesnt-work-properly
55	define('POLYLANG_URL', plugins_url('/' . basename(POLYLANG_DIR)));
56
57	// default url to access user data such as custom flags
58	if (!defined('PLL_LOCAL_URL'))
59	define('PLL_LOCAL_URL', content_url('/polylang'));
60
61	// cookie name. no cookie will be used if set to false
62	if (!defined('PLL_COOKIE'))
63	define('PLL_COOKIE', 'pll_language');
64
65	// backward compatibility WP < 3.6
66	// the search form js is no more needed in WP 3.6+ except if the search form is hardcoded elsewhere than in searchform.php
67	if (!defined('PLL_SEARCH_FORM_JS') && !version_compare($GLOBALS['wp_version'], '3.6', '<'))
68	define('PLL_SEARCH_FORM_JS', false);
69
70	/*
71	* controls the plugin, as well as activation, and deactivation
72	*
73	* @since 0.1
74	*/
75	class Polylang {
76
77	/*
78	* constructor
79	*
80	* @since 0.1
81	*/
82	public function __construct() {
83	// manages plugin activation and deactivation
84	register_activation_hook( __FILE__, array(&$this, 'activate'));
85	register_deactivation_hook( __FILE__, array(&$this, 'deactivate'));
86
87	// stopping here if we are going to deactivate the plugin (avoids breaking rewrite rules)
88	if (isset($_GET['action'], $_GET['plugin']) && 'deactivate' == $_GET['action'] && plugin_basename(__FILE__) == $_GET['plugin'])
89	return;
90
91	// avoid loading polylang admin for frontend ajax requests
92	// special test for plupload which does not use jquery ajax and thus does not pass our ajax prefilter
93	if (!defined('PLL_AJAX_ON_FRONT'))
94	define('PLL_AJAX_ON_FRONT', defined('DOING_AJAX') && DOING_AJAX && empty($_REQUEST['pll_ajax_backend']) && !(isset( $_REQUEST['action'] ) && 'upload-attachment' === $_REQUEST['action']));
95
96	if (!defined('PLL_ADMIN'))
97	define('PLL_ADMIN', defined('DOING_CRON') \|\| (is_admin() && !PLL_AJAX_ON_FRONT));
98
99	if (!defined('PLL_SETTINGS'))
100	define('PLL_SETTINGS', is_admin() && isset($_GET['page']) && $_GET['page'] == 'mlang');
101
102	// blog creation on multisite
103	add_action('wpmu_new_blog', array(&$this, 'wpmu_new_blog'));
104
105	// FIXME maybe not available on every installations but widely used by WP plugins
106	spl_autoload_register(array(&$this, 'autoload')); // autoload classes
107
108	// override load text domain waiting for the language to be defined
109	// here for plugins which load text domain as soon as loaded :(
110	if (!defined('PLL_OLT') \|\| PLL_OLT)
111	new PLL_OLT_Manager();
112
113	// plugin initialization
114	// take no action before all plugins are loaded
115	add_action('plugins_loaded', array(&$this, 'init'), 1);
116
117	// loads the API
118	require_once(PLL_INC.'/api.php');
119
120	// WPML API
121	if (!defined('PLL_WPML_COMPAT') \|\| PLL_WPML_COMPAT)
122	require_once (PLL_INC.'/wpml-compat.php');
123
124	// extra code for compatibility with some plugins
125	if (!defined('PLL_PLUGINS_COMPAT') \|\| PLL_PLUGINS_COMPAT)
126	new PLL_Plugins_Compat();
127	}
128
129	/*
130	* activation or deactivation for all blogs
131	*
132	* @since 1.2
133	*
134	* @param string $what either 'activate' or 'deactivate'
135	*/
136	protected function do_for_all_blogs($what) {
137	// network
138	if (is_multisite() && isset($_GET['networkwide']) && ($_GET['networkwide'] == 1)) {
139	global $wpdb;
140
141	foreach ($wpdb->get_col("SELECT blog_id FROM $wpdb->blogs") as $blog_id) {
142	switch_to_blog($blog_id);
143	$what == 'activate' ? $this->_activate() : $this->_deactivate();
144	}
145	restore_current_blog();
146	}
147
148	// single blog
149	else
150	$what == 'activate' ? $this->_activate() : $this->_deactivate();
151	}
152
153	/*
154	* plugin activation for multisite
155	*
156	* @since 0.1
157	*/
158	public function activate() {
159	global $wp_version;
160	load_plugin_textdomain('polylang', false, basename(POLYLANG_DIR).'/languages'); // plugin i18n
161
162	if (version_compare($wp_version, PLL_MIN_WP_VERSION , '<'))
163	die (sprintf('<p style = "font-family: sans-serif; font-size: 12px; color: #333; margin: -5px">%s</p>',
164	sprintf(__('You are using WordPress %s. Polylang requires at least WordPress %s.', 'polylang'),
165	esc_html($wp_version),
166	PLL_MIN_WP_VERSION
167	)
168	));
169
170	$this->do_for_all_blogs('activate');
171	}
172
173	/*
174	* plugin activation
175	*
176	* @since 0.5
177	*/
178	protected function _activate() {
179	global $polylang;
180
181	if ($options = get_option('polylang')) {
182	// plugin upgrade
183	if (version_compare($options['version'], POLYLANG_VERSION, '<')) {
184	$upgrade = new PLL_Upgrade($options);
185	$upgrade->upgrade_at_activation();
186	}
187	}
188	// defines default values for options in case this is the first installation
189	else {
190	$options = array(
191	'browser' => 1, // default language for the front page is set by browser preference
192	'rewrite' => 1, // remove /language/ in permalinks (was the opposite before 0.7.2)
193	'hide_default' => 0, // do not remove URL language information for default language
194	'force_lang' => 0, // do not add URL language information when useless
195	'redirect_lang' => 0, // do not redirect the language page to the homepage
196	'media_support' => 1, // support languages and translation for media by default
197	'sync' => array(), // synchronisation is disabled by default (was the opposite before 1.2)
198	'post_types' => array_values(get_post_types(array('_builtin' => false, 'show_ui => true'))),
199	'taxonomies' => array_values(get_taxonomies(array('_builtin' => false, 'show_ui => true'))),
200	'domains' => array(),
201	'version' => POLYLANG_VERSION,
202	);
203
204	update_option('polylang', $options);
205	}
206
207	// always provide a global $polylang object and add our rewrite rules if needed
208	$polylang = new StdClass();
209	$polylang->options = &$options;
210	$polylang->model = new PLL_Admin_Model($options);
211	$polylang->links_model = $this->get_links_model($polylang->model, $options);
212	flush_rewrite_rules();
213	}
214
215	/*
216	* plugin deactivation for multisite
217	*
218	* @since 0.1
219	*/
220	public function deactivate() {
221	$this->do_for_all_blogs('deactivate');
222	}
223
224	/*
225	* plugin deactivation
226	*
227	* @since 0.5
228	*/
229	protected function _deactivate() {
230	flush_rewrite_rules();
231	}
232
233	/*
234	* blog creation on multisite (to set default options)
235	*
236	* @since 0.9.4
237	*
238	* @param int $blog_id
239	*/
240	public function wpmu_new_blog($blog_id) {
241	switch_to_blog($blog_id);
242	$this->_activate();
243	restore_current_blog();
244	}
245
246	/*
247	* autoload classes
248	*
249	* @since 1.2
250	*
251	* @param string $class
252	*/
253	public function autoload($class) {
254	$class = str_replace('_', '-', strtolower(substr($class, 4)));
255	foreach (array(PLL_INC, PLL_FRONT_INC, PLL_ADMIN_INC) as $path) {
256	if (file_exists($file = "$path/$class.php")) {
257	require_once($file);
258	break;
259	}
260	}
261	}
262
263	/*
264	* Polylang initialization
265	* setups models and separate admin and frontend
266	*
267	* @since 1.2
268	*/
269	public function init() {
270	global $polylang;
271
272	$options = get_option('polylang');
273
274	// plugin upgrade
275	if ($options && version_compare($options['version'], POLYLANG_VERSION, '<')) {
276	$upgrade = new PLL_Upgrade($options);
277	if (!$upgrade->upgrade()) // if the version is too old
278	return;
279	}
280
281	$class = apply_filters('pll_model', PLL_SETTINGS ? 'PLL_Admin_Model' : 'PLL_Model');
282	$model = new $class($options);
283	$links_model = $this->get_links_model($model);
284
285	if (PLL_ADMIN) {
286	$polylang = new PLL_Admin($links_model);
287	$polylang->init();
288	}
289	// do nothing on frontend if no language is defined
290	elseif ($model->get_languages_list()) {
291	$polylang = new PLL_Frontend($links_model);
292	$polylang->init();
293	}
294	else
295	do_action('pll_no_language_defined'); // to load overriden textdomains
296
297	// load wpml-config.xml
298	if (!defined('PLL_WPML_COMPAT') \|\| PLL_WPML_COMPAT)
299	new PLL_WPML_Config;
300	}
301
302	/*
303	* setup the links model based on options
304	*
305	* @since 1.2
306	*
307	* @param object $model instance of PLL_Model
308	* @return object implementing "links_model interface"
309	*/
310	protected function get_links_model(&$model) {
311	$c = array('Directory', 'Directory', 'Subdomain', 'Domain');
312	$class = get_option('permalink_structure') ? 'PLL_Links_' .$c[$model->options['force_lang']] : 'PLL_Links_Default';
313	return new $class($model);
314	}
315	}
316
317	new Polylang();
318