polylang / polylang.php

polylang.php in Polylang 1.5.4, at polylang.php

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1	<?php
2	/*
3	Plugin Name: Polylang
4	Plugin URI: http://polylang.wordpress.com/
5	Version: 1.5.4
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', '1.5.4');
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	// special test for customize_save done in frontend but for which we want to load the admin
94	if (!defined('PLL_AJAX_ON_FRONT')) {
95	$in = isset($_REQUEST['action']) && in_array($_REQUEST['action'], array('upload-attachment', 'customize_save'));
96	define('PLL_AJAX_ON_FRONT', defined('DOING_AJAX') && DOING_AJAX && empty($_REQUEST['pll_ajax_backend']) && !$in);
97	}
98
99	if (!defined('PLL_ADMIN'))
100	define('PLL_ADMIN', defined('DOING_CRON') \|\| (is_admin() && !PLL_AJAX_ON_FRONT));
101
102	if (!defined('PLL_SETTINGS'))
103	define('PLL_SETTINGS', is_admin() && isset($_GET['page']) && $_GET['page'] == 'mlang');
104
105	// blog creation on multisite
106	add_action('wpmu_new_blog', array(&$this, 'wpmu_new_blog'), 5); // before WP attempts to send mails which can break on some PHP versions
107
108	// FIXME maybe not available on every installations but widely used by WP plugins
109	spl_autoload_register(array(&$this, 'autoload')); // autoload classes
110
111	// override load text domain waiting for the language to be defined
112	// here for plugins which load text domain as soon as loaded :(
113	if (!defined('PLL_OLT') \|\| PLL_OLT)
114	new PLL_OLT_Manager();
115
116	// plugin initialization
117	// take no action before all plugins are loaded
118	add_action('plugins_loaded', array(&$this, 'init'), 1);
119
120	// loads the API
121	require_once(PLL_INC.'/api.php');
122
123	// WPML API
124	if (!defined('PLL_WPML_COMPAT') \|\| PLL_WPML_COMPAT)
125	require_once (PLL_INC.'/wpml-compat.php');
126
127	// extra code for compatibility with some plugins
128	if (!defined('PLL_PLUGINS_COMPAT') \|\| PLL_PLUGINS_COMPAT)
129	new PLL_Plugins_Compat();
130	}
131
132	/*
133	* activation or deactivation for all blogs
134	*
135	* @since 1.2
136	*
137	* @param string $what either 'activate' or 'deactivate'
138	*/
139	protected function do_for_all_blogs($what) {
140	// network
141	if (is_multisite() && isset($_GET['networkwide']) && ($_GET['networkwide'] == 1)) {
142	global $wpdb;
143
144	foreach ($wpdb->get_col("SELECT blog_id FROM $wpdb->blogs") as $blog_id) {
145	switch_to_blog($blog_id);
146	$what == 'activate' ? $this->_activate() : $this->_deactivate();
147	}
148	restore_current_blog();
149	}
150
151	// single blog
152	else
153	$what == 'activate' ? $this->_activate() : $this->_deactivate();
154	}
155
156	/*
157	* plugin activation for multisite
158	*
159	* @since 0.1
160	*/
161	public function activate() {
162	global $wp_version;
163	load_plugin_textdomain('polylang', false, basename(POLYLANG_DIR).'/languages'); // plugin i18n
164
165	if (version_compare($wp_version, PLL_MIN_WP_VERSION , '<'))
166	die (sprintf('<p style = "font-family: sans-serif; font-size: 12px; color: #333; margin: -5px">%s</p>',
167	sprintf(__('You are using WordPress %s. Polylang requires at least WordPress %s.', 'polylang'),
168	esc_html($wp_version),
169	PLL_MIN_WP_VERSION
170	)
171	));
172
173	$this->do_for_all_blogs('activate');
174	}
175
176	/*
177	* plugin activation
178	*
179	* @since 0.5
180	*/
181	protected function _activate() {
182	global $polylang;
183
184	if ($options = get_option('polylang')) {
185	// plugin upgrade
186	if (version_compare($options['version'], POLYLANG_VERSION, '<')) {
187	$upgrade = new PLL_Upgrade($options);
188	$upgrade->upgrade_at_activation();
189	}
190	}
191	// defines default values for options in case this is the first installation
192	else {
193	$options = array(
194	'browser' => 1, // default language for the front page is set by browser preference
195	'rewrite' => 1, // remove /language/ in permalinks (was the opposite before 0.7.2)
196	'hide_default' => 0, // do not remove URL language information for default language
197	'force_lang' => 0, // do not add URL language information when useless
198	'redirect_lang' => 0, // do not redirect the language page to the homepage
199	'media_support' => 1, // support languages and translation for media by default
200	'sync' => array(), // synchronisation is disabled by default (was the opposite before 1.2)
201	'post_types' => array_values(get_post_types(array('_builtin' => false, 'show_ui => true'))),
202	'taxonomies' => array_values(get_taxonomies(array('_builtin' => false, 'show_ui => true'))),
203	'domains' => array(),
204	'version' => POLYLANG_VERSION,
205	);
206
207	update_option('polylang', $options);
208	}
209
210	// always provide a global $polylang object and add our rewrite rules if needed
211	$polylang = new StdClass();
212	$polylang->options = &$options;
213	$polylang->model = new PLL_Admin_Model($options);
214	$polylang->links_model = $polylang->model->get_links_model();
215	flush_rewrite_rules();
216	}
217
218	/*
219	* plugin deactivation for multisite
220	*
221	* @since 0.1
222	*/
223	public function deactivate() {
224	$this->do_for_all_blogs('deactivate');
225	}
226
227	/*
228	* plugin deactivation
229	*
230	* @since 0.5
231	*/
232	protected function _deactivate() {
233	flush_rewrite_rules();
234	}
235
236	/*
237	* blog creation on multisite (to set default options)
238	*
239	* @since 0.9.4
240	*
241	* @param int $blog_id
242	*/
243	public function wpmu_new_blog($blog_id) {
244	switch_to_blog($blog_id);
245	$this->_activate();
246	restore_current_blog();
247	}
248
249	/*
250	* autoload classes
251	*
252	* @since 1.2
253	*
254	* @param string $class
255	*/
256	public function autoload($class) {
257	$class = str_replace('_', '-', strtolower(substr($class, 4)));
258	foreach (array(PLL_INC, PLL_FRONT_INC, PLL_ADMIN_INC) as $path) {
259	if (file_exists($file = "$path/$class.php")) {
260	require_once($file);
261	break;
262	}
263	}
264	}
265
266	/*
267	* Polylang initialization
268	* setups models and separate admin and frontend
269	*
270	* @since 1.2
271	*/
272	public function init() {
273	global $polylang;
274
275	$options = get_option('polylang');
276
277	// plugin upgrade
278	if ($options && version_compare($options['version'], POLYLANG_VERSION, '<')) {
279	$upgrade = new PLL_Upgrade($options);
280	if (!$upgrade->upgrade()) // if the version is too old
281	return;
282	}
283
284	$class = apply_filters('pll_model', PLL_SETTINGS ? 'PLL_Admin_Model' : 'PLL_Model');
285	$model = new $class($options);
286	$links_model = $model->get_links_model();
287
288	if (PLL_ADMIN) {
289	$polylang = new PLL_Admin($links_model);
290	$polylang->init();
291	}
292	// do nothing on frontend if no language is defined
293	elseif ($model->get_languages_list()) {
294	$polylang = new PLL_Frontend($links_model);
295	$polylang->init();
296	}
297
298	if (!$model->get_languages_list())
299	do_action('pll_no_language_defined'); // to load overriden textdomains
300
301	// load wpml-config.xml
302	if (!defined('PLL_WPML_COMPAT') \|\| PLL_WPML_COMPAT)
303	new PLL_WPML_Config;
304	}
305	}
306
307	new Polylang();
308