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foogallery / freemius / includes / fs-essential-functions.php

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fs-essential-functions.php

418 lines

1	<?php
2	/**
3	* IMPORTANT:
4	* This file will be loaded based on the order of the plugins/themes load.
5	* If there's a theme and a plugin using Freemius, the plugin's essential
6	* file will always load first.
7	*
8	* @package Freemius
9	* @copyright Copyright (c) 2015, Freemius, Inc.
10	* @license https://www.gnu.org/licenses/gpl-3.0.html GNU General Public License Version 3
11	* @since 1.1.5
12	*/
13
14	if ( ! function_exists( 'fs_normalize_path' ) ) {
15	if ( function_exists( 'wp_normalize_path' ) ) {
16	/**
17	* Normalize a filesystem path.
18	*
19	* Replaces backslashes with forward slashes for Windows systems, and ensures
20	* no duplicate slashes exist.
21	*
22	* @param string $path Path to normalize.
23	*
24	* @return string Normalized path.
25	*/
26	function fs_normalize_path( $path ) {
27	return wp_normalize_path( $path );
28	}
29	} else {
30	function fs_normalize_path( $path ) {
31	$path = str_replace( '\\', '/', $path );
32	$path = preg_replace( '\|/+\|', '/', $path );
33
34	return $path;
35	}
36	}
37	}
38
39	require_once dirname( __FILE__ ) . '/supplements/fs-essential-functions-2.2.1.php';
40
41	#region Core Redirect (copied from BuddyPress) -----------------------------------------
42
43	if ( ! function_exists( 'fs_redirect' ) ) {
44	/**
45	* Redirects to another page, with a workaround for the IIS Set-Cookie bug.
46	*
47	* @link http://support.microsoft.com/kb/q176113/
48	* @since 1.5.1
49	* @uses apply_filters() Calls 'wp_redirect' hook on $location and $status.
50	*
51	* @param string $location The path to redirect to.
52	* @param bool $exit If true, exit after redirect (Since 1.2.1.5).
53	* @param int $status Status code to use.
54	*
55	* @return bool False if $location is not set
56	*/
57	function fs_redirect( $location, $exit = true, $status = 302 ) {
58	global $is_IIS;
59
60	$file = '';
61	$line = '';
62	if ( headers_sent($file, $line) ) {
63	if ( WP_FS__DEBUG_SDK && class_exists( 'FS_Admin_Notices' ) ) {
64	$notices = FS_Admin_Notices::instance( 'global' );
65
66	$notices->add( "Freemius failed to redirect the page because the headers have been already sent from line <b><code>{$line}</code></b> in file <b><code>{$file}</code></b>. If it's unexpected, it usually happens due to invalid space and/or EOL character(s).", 'Oops...', 'error' );
67	}
68
69	return false;
70	}
71
72	if ( defined( 'DOING_AJAX' ) ) {
73	// Don't redirect on AJAX calls.
74	return false;
75	}
76
77	if ( ! $location ) // allows the wp_redirect filter to cancel a redirect
78	{
79	return false;
80	}
81
82	$location = fs_sanitize_redirect( $location );
83
84	if ( $is_IIS ) {
85	header( "Refresh: 0;url=$location" );
86	} else {
87	if ( php_sapi_name() != 'cgi-fcgi' ) {
88	status_header( $status );
89	} // This causes problems on IIS and some FastCGI setups
90	header( "Location: $location" );
91	}
92
93	if ( $exit ) {
94	exit();
95	}
96
97	return true;
98	}
99
100	if ( ! function_exists( 'fs_sanitize_redirect' ) ) {
101	/**
102	* Sanitizes a URL for use in a redirect.
103	*
104	* @since 2.3
105	*
106	* @param string $location
107	*
108	* @return string redirect-sanitized URL
109	*/
110	function fs_sanitize_redirect( $location ) {
111	$location = preg_replace( '\|[^a-z0-9-~+_.?#=&;,/:%!]\|i', '', $location );
112	$location = fs_kses_no_null( $location );
113
114	// remove %0d and %0a from location
115	$strip = array( '%0d', '%0a' );
116	$found = true;
117	while ( $found ) {
118	$found = false;
119	foreach ( (array) $strip as $val ) {
120	while ( strpos( $location, $val ) !== false ) {
121	$found = true;
122	$location = str_replace( $val, '', $location );
123	}
124	}
125	}
126
127	return $location;
128	}
129	}
130
131	if ( ! function_exists( 'fs_kses_no_null' ) ) {
132	/**
133	* Removes any NULL characters in $string.
134	*
135	* @since 1.0.0
136	*
137	* @param string $string
138	*
139	* @return string
140	*/
141	function fs_kses_no_null( $string ) {
142	$string = preg_replace( '/\0+/', '', $string );
143	$string = preg_replace( '/(\\\\0)+/', '', $string );
144
145	return $string;
146	}
147	}
148	}
149
150	#endregion Core Redirect (copied from BuddyPress) -----------------------------------------
151
152	if ( ! function_exists( 'fs_get_ip' ) ) {
153	/**
154	* Get server IP.
155	*
156	* @since 2.5.1 This method returns the server IP.
157	*
158	* @author Vova Feldman (@svovaf)
159	* @since 1.1.2
160	*
161	* @return string\|null
162	*/
163	function fs_get_ip() {
164	return empty( $_SERVER[ 'SERVER_ADDR' ] ) ?
165	null :
166	$_SERVER[ 'SERVER_ADDR' ];
167	}
168	}
169
170	if ( ! function_exists( 'fs_find_caller_plugin_file' ) ) {
171	/**
172	* Leverage backtrace to find caller plugin main file path.
173	*
174	* @author Vova Feldman (@svovaf)
175	* @since 1.0.6
176	*
177	* @return string
178	*/
179	function fs_find_caller_plugin_file() {
180	/**
181	* All the code below will be executed once on activation.
182	* If the user changes the main plugin's file name, the file_exists()
183	* will catch it.
184	*/
185	if ( ! function_exists( 'get_plugins' ) ) {
186	require_once ABSPATH . 'wp-admin/includes/plugin.php';
187	}
188
189	$all_plugins = fs_get_plugins( true );
190	$all_plugins_paths = array();
191
192	// Get active plugin's main files real full names (might be symlinks).
193	foreach ( $all_plugins as $relative_path => $data ) {
194	$all_plugins_paths[] = fs_normalize_path( realpath( WP_PLUGIN_DIR . '/' . $relative_path ) );
195	}
196
197	$plugin_file = null;
198	for ( $i = 1, $bt = debug_backtrace(), $len = count( $bt ); $i < $len; $i ++ ) {
199	if ( empty( $bt[ $i ]['file'] ) ) {
200	continue;
201	}
202
203	if ( in_array( fs_normalize_path( $bt[ $i ]['file'] ), $all_plugins_paths ) ) {
204	$plugin_file = $bt[ $i ]['file'];
205	break;
206	}
207	}
208
209	if ( is_null( $plugin_file ) ) {
210	// Throw an error to the developer in case of some edge case dev environment.
211	wp_die(
212	'Freemius SDK couldn\'t find the plugin\'s main file. Please contact sdk@freemius.com with the current error.',
213	'Error',
214	array( 'back_link' => true )
215	);
216	}
217
218	return $plugin_file;
219	}
220	}
221
222	require_once dirname( __FILE__ ) . '/supplements/fs-essential-functions-1.1.7.1.php';
223
224	if ( ! function_exists( 'fs_update_sdk_newest_version' ) ) {
225	/**
226	* Update SDK newest version reference.
227	*
228	* @author Vova Feldman (@svovaf)
229	* @since 1.1.6
230	*
231	* @param string $sdk_relative_path
232	* @param string\|bool $plugin_file
233	*
234	* @global $fs_active_plugins
235	*/
236	function fs_update_sdk_newest_version( $sdk_relative_path, $plugin_file = false ) {
237	/**
238	* If there is a plugin running an older version of FS (1.2.1 or below), the `fs_update_sdk_newest_version()`
239	* function in the older version will be used instead of this one. But since the older version is using
240	* the `is_plugin_active` function to check if a plugin is active, passing the theme's `plugin_path` to the
241	* `is_plugin_active` function will return false since the path is not a plugin path, so `in_activation` will be
242	* `true` for theme modules and the upgrading of the SDK version to 1.2.2 or newer version will work fine.
243	*
244	* Future versions that will call this function will use the proper logic here instead of just relying on the
245	* `is_plugin_active` function to fail for themes.
246	*
247	* @author Leo Fajardo (@leorw)
248	* @since 1.2.2
249	*/
250
251	global $fs_active_plugins;
252
253	$newest_sdk = $fs_active_plugins->plugins[ $sdk_relative_path ];
254
255	if ( ! is_string( $plugin_file ) ) {
256	$plugin_file = plugin_basename( fs_find_caller_plugin_file() );
257	}
258
259	if ( ! isset( $newest_sdk->type ) \|\| 'theme' !== $newest_sdk->type ) {
260	if ( ! function_exists( 'is_plugin_active' ) ) {
261	require_once ABSPATH . 'wp-admin/includes/plugin.php';
262	}
263
264	$in_activation = ( ! is_plugin_active( $plugin_file ) );
265	} else {
266	$theme = wp_get_theme();
267	$in_activation = ( $newest_sdk->plugin_path == $theme->stylesheet );
268	}
269
270	$fs_active_plugins->newest = (object) array(
271	'plugin_path' => $plugin_file,
272	'sdk_path' => $sdk_relative_path,
273	'version' => $newest_sdk->version,
274	'in_activation' => $in_activation,
275	'timestamp' => time(),
276	);
277
278	// Update DB with latest SDK version and path.
279	update_option( 'fs_active_plugins', $fs_active_plugins );
280	}
281	}
282
283	if ( ! function_exists( 'fs_newest_sdk_plugin_first' ) ) {
284	/**
285	* Reorder the plugins load order so the plugin with the newest Freemius SDK is loaded first.
286	*
287	* @author Vova Feldman (@svovaf)
288	* @since 1.1.6
289	*
290	* @return bool Was plugin order changed. Return false if plugin was loaded first anyways.
291	*
292	* @global $fs_active_plugins
293	*/
294	function fs_newest_sdk_plugin_first() {
295	global $fs_active_plugins;
296
297	/**
298	* @todo Multi-site network activated plugin are always loaded prior to site plugins so if there's a plugin activated in the network mode that has an older version of the SDK of another plugin which is site activated that has new SDK version, the fs-essential-functions.php will be loaded from the older SDK. Same thing about MU plugins (loaded even before network activated plugins).
299	*
300	* @link https://github.com/Freemius/wordpress-sdk/issues/26
301	*/
302
303	$newest_sdk_plugin_path = $fs_active_plugins->newest->plugin_path;
304
305	$active_plugins = get_option( 'active_plugins', array() );
306	$updated_active_plugins = array( $newest_sdk_plugin_path );
307
308	$plugin_found = false;
309	$is_first_path = true;
310
311	foreach ( $active_plugins as $key => $plugin_path ) {
312	if ( $plugin_path === $newest_sdk_plugin_path ) {
313	if ( $is_first_path ) {
314	// if it's the first plugin already, no need to continue
315	return false;
316	}
317
318	$plugin_found = true;
319
320	// Skip the plugin (it is already added as the 1st item of $updated_active_plugins).
321	continue;
322	}
323
324	$updated_active_plugins[] = $plugin_path;
325
326	if ( $is_first_path ) {
327	$is_first_path = false;
328	}
329	}
330
331	if ( $plugin_found ) {
332	update_option( 'active_plugins', $updated_active_plugins );
333
334	return true;
335	}
336
337	if ( is_multisite() ) {
338	// Plugin is network active.
339	$network_active_plugins = get_site_option( 'active_sitewide_plugins', array() );
340
341	if ( isset( $network_active_plugins[ $newest_sdk_plugin_path ] ) ) {
342	reset( $network_active_plugins );
343	if ( $newest_sdk_plugin_path === key( $network_active_plugins ) ) {
344	// Plugin is already activated first on the network level.
345	return false;
346	} else {
347	$time = $network_active_plugins[ $newest_sdk_plugin_path ];
348
349	// Remove plugin from its current position.
350	unset( $network_active_plugins[ $newest_sdk_plugin_path ] );
351
352	// Set it to be included first.
353	$network_active_plugins = array( $newest_sdk_plugin_path => $time ) + $network_active_plugins;
354
355	update_site_option( 'active_sitewide_plugins', $network_active_plugins );
356
357	return true;
358	}
359	}
360	}
361
362	return false;
363	}
364	}
365
366	if ( ! function_exists( 'fs_fallback_to_newest_active_sdk' ) ) {
367	/**
368	* Go over all Freemius SDKs in the system and find and "remember"
369	* the newest SDK which is associated with an active plugin.
370	*
371	* @author Vova Feldman (@svovaf)
372	* @since 1.1.6
373	*
374	* @global $fs_active_plugins
375	*/
376	function fs_fallback_to_newest_active_sdk() {
377	global $fs_active_plugins;
378
379	/**
380	* @var object $newest_sdk_data
381	*/
382	$newest_sdk_data = null;
383	$newest_sdk_path = null;
384
385	foreach ( $fs_active_plugins->plugins as $sdk_relative_path => $data ) {
386	if ( is_null( $newest_sdk_data ) \|\| version_compare( $data->version, $newest_sdk_data->version, '>' )
387	) {
388	// If plugin inactive or SDK starter file doesn't exist, remove SDK reference.
389	if ( 'plugin' === $data->type ) {
390	$is_module_active = is_plugin_active( $data->plugin_path );
391	} else {
392	$active_theme = wp_get_theme();
393	$is_module_active = ( $data->plugin_path === $active_theme->get_template() );
394	}
395
396	$is_sdk_exists = file_exists( fs_normalize_path( WP_PLUGIN_DIR . '/' . $sdk_relative_path . '/start.php' ) );
397
398	if ( ! $is_module_active \|\| ! $is_sdk_exists ) {
399	unset( $fs_active_plugins->plugins[ $sdk_relative_path ] );
400
401	// No need to store the data since it will be stored in fs_update_sdk_newest_version()
402	// or explicitly with update_option().
403	} else {
404	$newest_sdk_data = $data;
405	$newest_sdk_path = $sdk_relative_path;
406	}
407	}
408	}
409
410	if ( is_null( $newest_sdk_data ) ) {
411	// Couldn't find any SDK reference.
412	$fs_active_plugins = new stdClass();
413	update_option( 'fs_active_plugins', $fs_active_plugins );
414	} else {
415	fs_update_sdk_newest_version( $newest_sdk_path, $newest_sdk_data->plugin_path );
416	}
417	}
418	}