fs-essential-functions.php — Gallery : FooGallery 3.2.6

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

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fs-essential-functions.php

421 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	if ( ! defined( 'ABSPATH' ) ) {
14	exit;
15	}
16
17	if ( ! function_exists( 'fs_normalize_path' ) ) {
18	if ( function_exists( 'wp_normalize_path' ) ) {
19	/**
20	* Normalize a filesystem path.
21	*
22	* Replaces backslashes with forward slashes for Windows systems, and ensures
23	* no duplicate slashes exist.
24	*
25	* @param string $path Path to normalize.
26	*
27	* @return string Normalized path.
28	*/
29	function fs_normalize_path( $path ) {
30	return wp_normalize_path( $path );
31	}
32	} else {
33	function fs_normalize_path( $path ) {
34	$path = str_replace( '\\', '/', $path );
35	$path = preg_replace( '\|/+\|', '/', $path );
36
37	return $path;
38	}
39	}
40	}
41
42	require_once dirname( __FILE__ ) . '/supplements/fs-essential-functions-2.2.1.php';
43
44	#region Core Redirect (copied from BuddyPress) -----------------------------------------
45
46	if ( ! function_exists( 'fs_redirect' ) ) {
47	/**
48	* Redirects to another page, with a workaround for the IIS Set-Cookie bug.
49	*
50	* @link http://support.microsoft.com/kb/q176113/
51	* @since 1.5.1
52	* @uses apply_filters() Calls 'wp_redirect' hook on $location and $status.
53	*
54	* @param string $location The path to redirect to.
55	* @param bool $exit If true, exit after redirect (Since 1.2.1.5).
56	* @param int $status Status code to use.
57	*
58	* @return bool False if $location is not set
59	*/
60	function fs_redirect( $location, $exit = true, $status = 302 ) {
61	global $is_IIS;
62
63	$file = '';
64	$line = '';
65	if ( headers_sent($file, $line) ) {
66	if ( WP_FS__DEBUG_SDK && class_exists( 'FS_Admin_Notices' ) ) {
67	$notices = FS_Admin_Notices::instance( 'global' );
68
69	$notices->add( "Freemius failed to redirect the page because the headers have been already sent from line <b><code>{$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' );
70	}
71
72	return false;
73	}
74
75	if ( defined( 'DOING_AJAX' ) ) {
76	// Don't redirect on AJAX calls.
77	return false;
78	}
79
80	if ( ! $location ) // allows the wp_redirect filter to cancel a redirect
81	{
82	return false;
83	}
84
85	$location = fs_sanitize_redirect( $location );
86
87	if ( $is_IIS ) {
88	header( "Refresh: 0;url=$location" );
89	} else {
90	if ( php_sapi_name() != 'cgi-fcgi' ) {
91	status_header( $status );
92	} // This causes problems on IIS and some FastCGI setups
93	header( "Location: $location" );
94	}
95
96	if ( $exit ) {
97	exit();
98	}
99
100	return true;
101	}
102
103	if ( ! function_exists( 'fs_sanitize_redirect' ) ) {
104	/**
105	* Sanitizes a URL for use in a redirect.
106	*
107	* @since 2.3
108	*
109	* @param string $location
110	*
111	* @return string redirect-sanitized URL
112	*/
113	function fs_sanitize_redirect( $location ) {
114	$location = preg_replace( '\|[^a-z0-9-~+_.?#=&;,/:%!]\|i', '', $location );
115	$location = fs_kses_no_null( $location );
116
117	// remove %0d and %0a from location
118	$strip = array( '%0d', '%0a' );
119	$found = true;
120	while ( $found ) {
121	$found = false;
122	foreach ( (array) $strip as $val ) {
123	while ( strpos( $location, $val ) !== false ) {
124	$found = true;
125	$location = str_replace( $val, '', $location );
126	}
127	}
128	}
129
130	return $location;
131	}
132	}
133
134	if ( ! function_exists( 'fs_kses_no_null' ) ) {
135	/**
136	* Removes any NULL characters in $string.
137	*
138	* @since 1.0.0
139	*
140	* @param string $string
141	*
142	* @return string
143	*/
144	function fs_kses_no_null( $string ) {
145	$string = preg_replace( '/\0+/', '', $string );
146	$string = preg_replace( '/(\\\\0)+/', '', $string );
147
148	return $string;
149	}
150	}
151	}
152
153	#endregion Core Redirect (copied from BuddyPress) -----------------------------------------
154
155	if ( ! function_exists( 'fs_get_ip' ) ) {
156	/**
157	* Get server IP.
158	*
159	* @since 2.5.1 This method returns the server IP.
160	*
161	* @author Vova Feldman (@svovaf)
162	* @since 1.1.2
163	*
164	* @return string\|null
165	*/
166	function fs_get_ip() {
167	return empty( $_SERVER[ 'SERVER_ADDR' ] ) ?
168	null :
169	$_SERVER[ 'SERVER_ADDR' ];
170	}
171	}
172
173	if ( ! function_exists( 'fs_find_caller_plugin_file' ) ) {
174	/**
175	* Leverage backtrace to find caller plugin main file path.
176	*
177	* @author Vova Feldman (@svovaf)
178	* @since 1.0.6
179	*
180	* @return string
181	*/
182	function fs_find_caller_plugin_file() {
183	/**
184	* All the code below will be executed once on activation.
185	* If the user changes the main plugin's file name, the file_exists()
186	* will catch it.
187	*/
188	if ( ! function_exists( 'get_plugins' ) ) {
189	require_once ABSPATH . 'wp-admin/includes/plugin.php';
190	}
191
192	$all_plugins = fs_get_plugins( true );
193	$all_plugins_paths = array();
194
195	// Get active plugin's main files real full names (might be symlinks).
196	foreach ( $all_plugins as $relative_path => $data ) {
197	$all_plugins_paths[] = fs_normalize_path( realpath( WP_PLUGIN_DIR . '/' . $relative_path ) );
198	}
199
200	$plugin_file = null;
201	for ( $i = 1, $bt = debug_backtrace(), $len = count( $bt ); $i < $len; $i ++ ) {
202	if ( empty( $bt[ $i ]['file'] ) ) {
203	continue;
204	}
205
206	if ( in_array( fs_normalize_path( $bt[ $i ]['file'] ), $all_plugins_paths ) ) {
207	$plugin_file = $bt[ $i ]['file'];
208	break;
209	}
210	}
211
212	if ( is_null( $plugin_file ) ) {
213	// Throw an error to the developer in case of some edge case dev environment.
214	wp_die(
215	'Freemius SDK couldn\'t find the plugin\'s main file. Please contact sdk@freemius.com with the current error.',
216	'Error',
217	array( 'back_link' => true )
218	);
219	}
220
221	return $plugin_file;
222	}
223	}
224
225	require_once dirname( __FILE__ ) . '/supplements/fs-essential-functions-1.1.7.1.php';
226
227	if ( ! function_exists( 'fs_update_sdk_newest_version' ) ) {
228	/**
229	* Update SDK newest version reference.
230	*
231	* @author Vova Feldman (@svovaf)
232	* @since 1.1.6
233	*
234	* @param string $sdk_relative_path
235	* @param string\|bool $plugin_file
236	*
237	* @global $fs_active_plugins
238	*/
239	function fs_update_sdk_newest_version( $sdk_relative_path, $plugin_file = false ) {
240	/**
241	* If there is a plugin running an older version of FS (1.2.1 or below), the `fs_update_sdk_newest_version()`
242	* function in the older version will be used instead of this one. But since the older version is using
243	* the `is_plugin_active` function to check if a plugin is active, passing the theme's `plugin_path` to the
244	* `is_plugin_active` function will return false since the path is not a plugin path, so `in_activation` will be
245	* `true` for theme modules and the upgrading of the SDK version to 1.2.2 or newer version will work fine.
246	*
247	* Future versions that will call this function will use the proper logic here instead of just relying on the
248	* `is_plugin_active` function to fail for themes.
249	*
250	* @author Leo Fajardo (@leorw)
251	* @since 1.2.2
252	*/
253
254	global $fs_active_plugins;
255
256	$newest_sdk = $fs_active_plugins->plugins[ $sdk_relative_path ];
257
258	if ( ! is_string( $plugin_file ) ) {
259	$plugin_file = plugin_basename( fs_find_caller_plugin_file() );
260	}
261
262	if ( ! isset( $newest_sdk->type ) \|\| 'theme' !== $newest_sdk->type ) {
263	if ( ! function_exists( 'is_plugin_active' ) ) {
264	require_once ABSPATH . 'wp-admin/includes/plugin.php';
265	}
266
267	$in_activation = ( ! is_plugin_active( $plugin_file ) );
268	} else {
269	$theme = wp_get_theme();
270	$in_activation = ( $newest_sdk->plugin_path == $theme->stylesheet );
271	}
272
273	$fs_active_plugins->newest = (object) array(
274	'plugin_path' => $plugin_file,
275	'sdk_path' => $sdk_relative_path,
276	'version' => $newest_sdk->version,
277	'in_activation' => $in_activation,
278	'timestamp' => time(),
279	);
280
281	// Update DB with latest SDK version and path.
282	update_option( 'fs_active_plugins', $fs_active_plugins );
283	}
284	}
285
286	if ( ! function_exists( 'fs_newest_sdk_plugin_first' ) ) {
287	/**
288	* Reorder the plugins load order so the plugin with the newest Freemius SDK is loaded first.
289	*
290	* @author Vova Feldman (@svovaf)
291	* @since 1.1.6
292	*
293	* @return bool Was plugin order changed. Return false if plugin was loaded first anyways.
294	*
295	* @global $fs_active_plugins
296	*/
297	function fs_newest_sdk_plugin_first() {
298	global $fs_active_plugins;
299
300	/**
301	* @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).
302	*
303	* @link https://github.com/Freemius/wordpress-sdk/issues/26
304	*/
305
306	$newest_sdk_plugin_path = $fs_active_plugins->newest->plugin_path;
307
308	$active_plugins = get_option( 'active_plugins', array() );
309	$updated_active_plugins = array( $newest_sdk_plugin_path );
310
311	$plugin_found = false;
312	$is_first_path = true;
313
314	foreach ( $active_plugins as $key => $plugin_path ) {
315	if ( $plugin_path === $newest_sdk_plugin_path ) {
316	if ( $is_first_path ) {
317	// if it's the first plugin already, no need to continue
318	return false;
319	}
320
321	$plugin_found = true;
322
323	// Skip the plugin (it is already added as the 1st item of $updated_active_plugins).
324	continue;
325	}
326
327	$updated_active_plugins[] = $plugin_path;
328
329	if ( $is_first_path ) {
330	$is_first_path = false;
331	}
332	}
333
334	if ( $plugin_found ) {
335	update_option( 'active_plugins', $updated_active_plugins );
336
337	return true;
338	}
339
340	if ( is_multisite() ) {
341	// Plugin is network active.
342	$network_active_plugins = get_site_option( 'active_sitewide_plugins', array() );
343
344	if ( isset( $network_active_plugins[ $newest_sdk_plugin_path ] ) ) {
345	reset( $network_active_plugins );
346	if ( $newest_sdk_plugin_path === key( $network_active_plugins ) ) {
347	// Plugin is already activated first on the network level.
348	return false;
349	} else {
350	$time = $network_active_plugins[ $newest_sdk_plugin_path ];
351
352	// Remove plugin from its current position.
353	unset( $network_active_plugins[ $newest_sdk_plugin_path ] );
354
355	// Set it to be included first.
356	$network_active_plugins = array( $newest_sdk_plugin_path => $time ) + $network_active_plugins;
357
358	update_site_option( 'active_sitewide_plugins', $network_active_plugins );
359
360	return true;
361	}
362	}
363	}
364
365	return false;
366	}
367	}
368
369	if ( ! function_exists( 'fs_fallback_to_newest_active_sdk' ) ) {
370	/**
371	* Go over all Freemius SDKs in the system and find and "remember"
372	* the newest SDK which is associated with an active plugin.
373	*
374	* @author Vova Feldman (@svovaf)
375	* @since 1.1.6
376	*
377	* @global $fs_active_plugins
378	*/
379	function fs_fallback_to_newest_active_sdk() {
380	global $fs_active_plugins;
381
382	/**
383	* @var object $newest_sdk_data
384	*/
385	$newest_sdk_data = null;
386	$newest_sdk_path = null;
387
388	foreach ( $fs_active_plugins->plugins as $sdk_relative_path => $data ) {
389	if ( is_null( $newest_sdk_data ) \|\| version_compare( $data->version, $newest_sdk_data->version, '>' )
390	) {
391	// If plugin inactive or SDK starter file doesn't exist, remove SDK reference.
392	if ( 'plugin' === $data->type ) {
393	$is_module_active = is_plugin_active( $data->plugin_path );
394	} else {
395	$active_theme = wp_get_theme();
396	$is_module_active = ( $data->plugin_path === $active_theme->get_template() );
397	}
398
399	$is_sdk_exists = file_exists( fs_normalize_path( WP_PLUGIN_DIR . '/' . $sdk_relative_path . '/start.php' ) );
400
401	if ( ! $is_module_active \|\| ! $is_sdk_exists ) {
402	unset( $fs_active_plugins->plugins[ $sdk_relative_path ] );
403
404	// No need to store the data since it will be stored in fs_update_sdk_newest_version()
405	// or explicitly with update_option().
406	} else {
407	$newest_sdk_data = $data;
408	$newest_sdk_path = $sdk_relative_path;
409	}
410	}
411	}
412
413	if ( is_null( $newest_sdk_data ) ) {
414	// Couldn't find any SDK reference.
415	$fs_active_plugins = new stdClass();
416	update_option( 'fs_active_plugins', $fs_active_plugins );
417	} else {
418	fs_update_sdk_newest_version( $newest_sdk_path, $newest_sdk_data->plugin_path );
419	}
420	}
421	}