post-snippets / post-snippets.php

post-snippets.php in Post Snippets – Custom WordPress Code Snippets Customizer 1.9, at post-snippets.php

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1	<?php
2	/*
3	Plugin Name: Post Snippets
4	Plugin URI: http://wpstorm.net/wordpress-plugins/post-snippets/
5	Description: Stores snippets of HTML code or reoccurring text that you often use in your posts. You can use predefined variables to replace parts of the snippet on insert. All snippets are available in the post editor with a TinyMCE button or Quicktags.
6	Version: 1.9
7	Author: Johan Steen
8	Author URI: http://johansteen.se/
9	Text Domain: post-snippets
10
11	Copyright 2009-2012 Johan Steen (email : artstorm [at] gmail [dot] com)
12
13	This program is free software; you can redistribute it and/or modify
14	it under the terms of the GNU General Public License as published by
15	the Free Software Foundation; either version 2 of the License, or
16	(at your option) any later version.
17
18	This program is distributed in the hope that it will be useful,
19	but WITHOUT ANY WARRANTY; without even the implied warranty of
20	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
21	GNU General Public License for more details.
22
23	You should have received a copy of the GNU General Public License
24	along with this program; if not, write to the Free Software
25	Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
26	*/
27
28	class Post_Snippets {
29	private $tinymce_plugin_name = 'post_snippets';
30	private $plugin_options = 'post_snippets_options';
31
32	// -------------------------------------------------------------------------
33
34	public function __construct() {
35	// Define the domain and path for translations
36	$rel_path = dirname(plugin_basename($this->get_File())).'/languages/';
37	load_plugin_textdomain( 'post-snippets', false, $rel_path );
38
39	$this->init_hooks();
40	}
41
42	/**
43	* Initializes the hooks for the plugin
44	*/
45	function init_hooks() {
46
47	// Add TinyMCE button
48	add_action('init', array(&$this, 'add_tinymce_button') );
49
50	# Settings link on plugins list
51	add_filter( 'plugin_action_links', array(&$this, 'plugin_action_links'), 10, 2 );
52	# Options Page
53	add_action( 'admin_menu', array(&$this,'wp_admin') );
54
55	$this->create_shortcodes();
56
57	# Adds the JS and HTML code in the header and footer for the jQuery insert UI dialog in the editor
58	add_action( 'admin_init', array(&$this,'enqueue_assets') );
59	add_action( 'admin_head', array(&$this,'jquery_ui_dialog') );
60	add_action( 'admin_footer', array(&$this,'insert_ui_dialog') );
61
62	# Add Editor QuickTag button
63	// IF WordPress is 3.3 or higher, use the new refactored method to add
64	// the quicktag button.
65	// Start showing a deprecated message from version 1.9 of the plugin for
66	// the old method. And remove it completely when the plugin hits 2.0.
67	global $wp_version;
68	if ( version_compare($wp_version, '3.3', '>=') ) {
69	add_action( 'admin_print_footer_scripts',
70	array(&$this,'add_quicktag_button'), 100 );
71	} else {
72	add_action( 'edit_form_advanced', array(&$this,'add_quicktag_button_pre33') );
73	add_action( 'edit_page_form', array(&$this,'add_quicktag_button_pre33') );
74	}
75	}
76
77
78	/**
79	* Quick link to the Post Snippets Settings page from the Plugins page.
80	*
81	* @return Array with all the plugin's action links
82	*/
83	function plugin_action_links( $links, $file ) {
84	if ( $file == plugin_basename( dirname($this->get_FILE()).'/post-snippets.php' ) ) {
85	$links[] = '<a href="options-general.php?page=post-snippets/post-snippets.php">'.__('Settings', 'post-snippets').'</a>';
86	}
87	return $links;
88	}
89
90
91	/**
92	* Enqueues the necessary scripts and styles for the plugins
93	*
94	* @since Post Snippets 1.7
95	*/
96	function enqueue_assets() {
97	wp_enqueue_script( 'jquery-ui-dialog' );
98	wp_enqueue_script( 'jquery-ui-tabs' );
99	wp_enqueue_style( 'wp-jquery-ui-dialog');
100
101	# Adds the CSS stylesheet for the jQuery UI dialog
102	$style_url = plugins_url( '/assets/post-snippets.css', __FILE__ );
103	$style_url = plugins_url( '/assets/post-snippets.css', $this->get_FILE() );
104	wp_register_style('post-snippets', $style_url);
105	wp_enqueue_style( 'post-snippets');
106	}
107
108
109	// -------------------------------------------------------------------------
110	// WordPress Editor Buttons
111	// -------------------------------------------------------------------------
112
113	/**
114	* Add TinyMCE button.
115	*
116	* Adds filters to add custom buttons to the TinyMCE editor (Visual Editor)
117	* in WordPress.
118	*
119	* @since Post Snippets 1.8.7
120	*/
121	public function add_tinymce_button()
122	{
123	// Don't bother doing this stuff if the current user lacks permissions
124	if ( !current_user_can('edit_posts') &&
125	!current_user_can('edit_pages') )
126	return;
127
128	// Add only in Rich Editor mode
129	if ( get_user_option('rich_editing') == 'true') {
130	add_filter('mce_external_plugins',
131	array(&$this, 'register_tinymce_plugin') );
132	add_filter('mce_buttons',
133	array(&$this, 'register_tinymce_button') );
134	}
135	}
136
137	/**
138	* Register TinyMCE button.
139	*
140	* Pushes the custom TinyMCE button into the array of with button names.
141	* 'separator' or '\|' can be pushed to the array as well. See the link
142	* for all available TinyMCE controls.
143	*
144	* @see wp-includes/class-wp-editor.php
145	* @link http://www.tinymce.com/wiki.php/Buttons/controls
146	* @since Post Snippets 1.8.7
147	*
148	* @param array $buttons Filter supplied array of buttons to modify
149	* @return array The modified array with buttons
150	*/
151	public function register_tinymce_button( $buttons )
152	{
153	array_push( $buttons, 'separator', $this->tinymce_plugin_name );
154	return $buttons;
155	}
156
157	/**
158	* Register TinyMCE plugin.
159	*
160	* Adds the absolute URL for the TinyMCE plugin to the associative array of
161	* plugins. Array structure: 'plugin_name' => 'plugin_url'
162	*
163	* @see wp-includes/class-wp-editor.php
164	* @since Post Snippets 1.8.7
165	*
166	* @param array $plugins Filter supplied array of plugins to modify
167	* @return array The modified array with plugins
168	*/
169	public function register_tinymce_plugin( $plugins )
170	{
171	// Load the TinyMCE plugin, editor_plugin.js, into the array
172	$plugins[$this->tinymce_plugin_name] =
173	plugins_url('/tinymce/editor_plugin.js', $this->get_FILE());
174
175	return $plugins;
176	}
177
178
179	// -------------------------------------------------------------------------
180
181
182	/**
183	* jQuery control for the dialog and Javascript needed to insert snippets into the editor
184	*
185	* @since Post Snippets 1.7
186	*/
187	function jquery_ui_dialog() {
188	echo "\n<!-- START: Post Snippets jQuery UI and related functions -->\n";
189	echo "<script type='text/javascript'>\n";
190
191	# Prepare the snippets and shortcodes into javascript variables
192	# so they can be inserted into the editor, and get the variables replaced
193	# with user defined strings.
194	$snippets = get_option($this->plugin_options);
195	foreach ($snippets as $key => $snippet) {
196	if ($snippet['shortcode']) {
197	# Build a long string of the variables, ie: varname1={varname1} varname2={varname2}
198	# so {varnameX} can be replaced at runtime.
199	$var_arr = explode(",",$snippet['vars']);
200	$variables = '';
201	if (!empty($var_arr[0])) {
202	foreach ($var_arr as $var) {
203	$variables .= ' ' . $var . '="{' . $var . '}"';
204	}
205	}
206	$shortcode = $snippet['title'] . $variables;
207	echo "var postsnippet_{$key} = '[" . $shortcode . "]';\n";
208	} else {
209	// To use $snippet is probably not a good naming convention here.
210	// rename to js_snippet or something?
211	$snippet = $snippet['snippet'];
212	# Fixes for potential collisions:
213	/* Replace <> with char codes, otherwise </script> in a snippet will break it */
214	$snippet = str_replace( '<', '\x3C', str_replace( '>', '\x3E', $snippet ) );
215	/* Escape " with \" */
216	$snippet = str_replace( '"', '\"', $snippet );
217	/* Remove CR and replace LF with \n to keep formatting */
218	$snippet = str_replace( chr(13), '', str_replace( chr(10), '\n', $snippet ) );
219	# Print out the variable containing the snippet
220	echo "var postsnippet_{$key} = \"" . $snippet . "\";\n";
221	}
222	}
223	?>
224
225	jQuery(document).ready(function($){
226	<?php
227	# Create js variables for all form fields
228	foreach ($snippets as $key => $snippet) {
229	$var_arr = explode(",",$snippet['vars']);
230	if (!empty($var_arr[0])) {
231	foreach ($var_arr as $key_2 => $var) {
232	$varname = "var_" . $key . "_" . $key_2;
233	echo "var {$varname} = $( \"#{$varname}\" );\n";
234	}
235	}
236	}
237	?>
238
239	var $tabs = $("#post-snippets-tabs").tabs();
240
241	$(function() {
242	$( "#post-snippets-dialog" ).dialog({
243	autoOpen: false,
244	modal: true,
245	dialogClass: 'wp-dialog',
246	buttons: {
247	Cancel: function() {
248	$( this ).dialog( "close" );
249	},
250	"Insert": function() {
251	$( this ).dialog( "close" );
252	var selected = $tabs.tabs('option', 'selected');
253	<?php
254	foreach ($snippets as $key => $snippet) {
255	?>
256	if (selected == <?php echo $key; ?>) {
257	insert_snippet = postsnippet_<?php echo $key; ?>;
258	<?php
259	$var_arr = explode(",",$snippet['vars']);
260	if (!empty($var_arr[0])) {
261	foreach ($var_arr as $key_2 => $var) {
262	$varname = "var_" . $key . "_" . $key_2; ?>
263	insert_snippet = insert_snippet.replace(/\{<?php echo $var; ?>\}/g, <?php echo $varname; ?>.val());
264	<?php
265	echo "\n";
266	}
267	}
268	?>
269	}
270	<?php
271	}
272	?>
273
274	if (caller == 'html') {
275	edInsertContent(muppCanv, insert_snippet);
276	} else {
277	muppCanv.execCommand('mceInsertContent', false, insert_snippet);
278	}
279
280	}
281	},
282	width: 500,
283	});
284	});
285	});
286
287	var muppCanv;
288	caller = '';
289
290	<!-- Deprecated -->
291	function edOpenPostSnippets(myField) {
292	muppCanv = myField;
293	caller = 'html';
294	jQuery( "#post-snippets-dialog" ).dialog( "open" );
295	};
296	<?php
297	echo "</script>\n";
298	echo "\n<!-- END: Post Snippets jQuery UI and related functions -->\n";
299	}
300
301
302	/**
303	* Insert Snippet jQuery UI dialog HTML for the post editor
304	*
305	* @since Post Snippets 1.7
306	*/
307	function insert_ui_dialog() {
308	echo "\n<!-- START: Post Snippets UI Dialog -->\n";
309	?>
310	<div class="hidden">
311	<div id="post-snippets-dialog" title="Post Snippets">
312
313	<div id="post-snippets-tabs">
314	<ul>
315	<?php
316	# Create a tab for each available snippet
317	$snippets = get_option($this->plugin_options);
318	foreach ($snippets as $key => $snippet) {
319	?>
320	<li><a href="#ps-tabs-<?php echo $key; ?>"><?php echo $snippet['title']; ?></a></li>
321	<?php } ?>
322	</ul>
323
324	<?php
325	# Create a panel with form fields for each available snippet
326	foreach ($snippets as $key => $snippet) { ?>
327	<div id="ps-tabs-<?php echo $key; ?>">
328	<?php
329	// Print a snippet description is available
330	if ( isset($snippet['description']) )
331	echo '<p class="howto">' . $snippet['description'] . "</p>\n";
332
333	// Get all variables defined for the snippet and output them as input fields
334	$var_arr = explode(",",$snippet['vars']);
335	if (!empty($var_arr[0])) {
336	foreach ($var_arr as $key_2 => $var) { ?>
337	<label for="var_<?php echo $key; ?>_<?php echo $key_2; ?>"><?php echo($var);?>:</label>
338	<input type="text" id="var_<?php echo $key; ?>_<?php echo $key_2; ?>" name="var_<?php echo $key; ?>_<?php echo $key_2; ?>" style="width: 190px" />
339	<br/>
340	<?php
341	}
342	} else {
343	// If no variables and no description available, output a text to inform the user that it's an insert snippet only
344	if ( empty($snippet['description']) )
345	echo '<p class="howto">' . __('This snippet is insert only, no variables defined.', 'post-snippets') . "</p>";
346	}
347	?>
348	</div><!-- #ps-tabs-## -->
349	<?php
350	}
351	?>
352	</div><!-- #post-snippets-tabs -->
353	</div><!-- #post-snippets-dialog -->
354	</div><!-- .hidden -->
355	<?php
356	echo "\n<!-- END: Post Snippets UI Dialog -->\n";
357	}
358
359
360	/**
361	* Adds a QuickTag button to the HTML editor.
362	*
363	* Compatible with WordPress 3.3 and newer.
364	*
365	* @see wp-includes/js/quicktags.dev.js -> qt.addButton()
366	* @since Post Snippets 1.8.6
367	*/
368	public function add_quicktag_button() {
369	echo "\n<!-- START: Add QuickTag button for Post Snippets -->\n";
370	?>
371	<script type="text/javascript" charset="utf-8">
372	QTags.addButton( 'post_snippets_id', 'Post Snippets', qt_post_snippets );
373	function qt_post_snippets() {
374	caller = 'html';
375	jQuery( "#post-snippets-dialog" ).dialog( "open" );
376	}
377	</script>
378	<?php
379	echo "\n<!-- END: Add QuickTag button for Post Snippets -->\n";
380	}
381
382
383	/**
384	* Adds a QuickTag button to the HTML editor
385	*
386	* @see wp-includes/js/quicktags.dev.js
387	* @since Post Snippets 1.7
388	* @deprecated Since 1.8.6
389	*/
390	function add_quicktag_button_pre33() {
391	echo "\n<!-- START: Post Snippets QuickTag button -->\n";
392	?>
393	<script type="text/javascript" charset="utf-8">
394	// <![CDATA[
395	//edButton(id, display, tagStart, tagEnd, access, open)
396	edbuttonlength = edButtons.length;
397	edButtons[edbuttonlength++] = new edButton('ed_postsnippets', 'Post Snippets', '', '', '', -1);
398	(function(){
399	if (typeof jQuery === 'undefined') {
400	return;
401	}
402	jQuery(document).ready(function(){
403	jQuery("#ed_toolbar").append('<input type="button" value="Post Snippets" id="ed_postsnippets" class="ed_button" onclick="edOpenPostSnippets(edCanvas);" title="Post Snippets" />');
404	});
405	}());
406	// ]]>
407	</script>
408	<?php
409	echo "\n<!-- END: Post Snippets QuickTag button -->\n";
410	}
411
412
413	/**
414	* Create the functions for shortcodes dynamically and register them
415	*/
416	function create_shortcodes() {
417	$snippets = get_option($this->plugin_options);
418	if (!empty($snippets)) {
419	foreach ($snippets as $snippet) {
420	// If shortcode is enabled for the snippet, and a snippet has been entered, register it as a shortcode.
421	if ( $snippet['shortcode'] && !empty($snippet['snippet']) ) {
422
423	$vars = explode(",",$snippet['vars']);
424	$vars_str = '';
425	foreach ($vars as $var) {
426	$vars_str = $vars_str . '"'.$var.'" => "",';
427	}
428
429	add_shortcode($snippet['title'], create_function('$atts,$content=null',
430	'$shortcode_symbols = array('.$vars_str.');
431	extract(shortcode_atts($shortcode_symbols, $atts));
432
433	$attributes = compact( array_keys($shortcode_symbols) );
434
435	// Add enclosed content if available to the attributes array
436	if ( $content != null )
437	$attributes["content"] = $content;
438
439
440	$snippet = \''. addslashes($snippet["snippet"]) .'\';
441	$snippet = str_replace("&", "&", $snippet);
442
443	foreach ($attributes as $key => $val) {
444	$snippet = str_replace("{".$key."}", $val, $snippet);
445	}
446
447	$php = "'. $snippet["php"] .'";
448	if ($php == true) {
449	$snippet = Post_Snippets::php_eval( $snippet );
450	}
451
452	return do_shortcode(stripslashes($snippet));') );
453	}
454	}
455	}
456	}
457
458	/**
459	* Evaluate a snippet as PHP code.
460	*
461	* @since Post Snippets 1.9
462	* @param string $content The snippet to evaluate
463	* @return string The result of the evaluation
464	*/
465	public static function php_eval( $content )
466	{
467	$content = stripslashes($content);
468
469	ob_start();
470	eval ($content);
471	$content = ob_get_clean();
472
473	return addslashes( $content );
474	}
475
476	/**
477	* The Admin Page and all it's functions
478	*/
479	function wp_admin() {
480	$option_page = add_options_page( 'Post Snippets Options', 'Post Snippets', 'administrator', $this->get_FILE(), array(&$this, 'options_page') );
481	if ( $option_page and class_exists('Post_Snippets_Help') ) {
482	$help = new Post_Snippets_Help( $option_page );
483	}
484	}
485
486	function admin_message($message) {
487	if ( $message ) {
488	?>
489	<div class="updated"><p><strong><?php echo $message; ?></strong></p></div>
490	<?php
491	}
492	}
493
494	function options_page() {
495	// Add a new Snippet
496	if (isset($_POST['add-snippet'])) {
497	$snippets = get_option($this->plugin_options);
498	if (empty($snippets)) { $snippets = array(); }
499	array_push($snippets, array (
500	'title' => "Untitled",
501	'vars' => "",
502	'description' => "",
503	'shortcode' => false,
504	'php' => false,
505	'snippet' => ""));
506	update_option($this->plugin_options, $snippets);
507	$this->admin_message( __( 'A snippet named Untitled has been added.', 'post-snippets' ) );
508	}
509
510	// Update Snippets
511	if (isset($_POST['update-post-snippets'])) {
512	$snippets = get_option($this->plugin_options);
513	if (!empty($snippets)) {
514	foreach ($snippets as $key => $value) {
515	$new_snippets[$key]['title'] = trim($_POST[$key.'_title']);
516	$new_snippets[$key]['vars'] = str_replace(" ", "", trim($_POST[$key.'_vars']) );
517	$new_snippets[$key]['shortcode'] = isset($_POST[$key.'_shortcode']) ? true : false;
518	$new_snippets[$key]['php'] = isset($_POST[$key.'_php']) ? true : false;
519
520	$new_snippets[$key]['snippet'] = wp_specialchars_decode( trim(stripslashes($_POST[$key.'_snippet'])), ENT_NOQUOTES);
521	$new_snippets[$key]['description'] = wp_specialchars_decode( trim(stripslashes($_POST[$key.'_description'])), ENT_NOQUOTES);
522	}
523	update_option($this->plugin_options, $new_snippets);
524	$this->admin_message( __( 'Snippets have been updated.', 'post-snippets' ) );
525	}
526	}
527
528	// Delete Snippets
529	if (isset($_POST['delete-selected'])) {
530	$snippets = get_option($this->plugin_options);
531	if (!empty($snippets)) {
532	$delete = $_POST['checked'];
533	$newsnippets = array();
534	foreach ($snippets as $key => $snippet) {
535	if (in_array($key,$delete) == false) {
536	array_push($newsnippets,$snippet);
537	}
538	}
539	update_option($this->plugin_options, $newsnippets);
540	$this->admin_message( __( 'Selected snippets have been deleted.', 'post-snippets' ) );
541	}
542	}
543
544	// Handle import of snippets (Run before the option page is outputted, in case any snippets have been imported, so they are displayed).
545	$import = $this->import_snippets();
546
547
548	// Render the settings screen
549	$settings = new Post_Snippets_Settings();
550	$settings->set_options( get_option($this->plugin_options) );
551	$settings->render();
552
553	?>
554	<h3><?php _e( 'Import/Export', 'post-snippets' ); ?></h3>
555	<strong><?php _e( 'Export', 'post-snippets' ); ?></strong><br/>
556	<form method="post">
557	<p><?php _e( 'Export your snippets for backup or to import them on another site.', 'post-snippets' ); ?></p>
558	<input type="submit" class="button" name="postsnippets_export" value="<?php _e( 'Export Snippets', 'post-snippets');?>"/>
559	</form>
560	<?php
561	$this->export_snippets();
562	echo $import;
563	}
564
565
566	/**
567	* Check if an export file shall be created, or if a download url should be pushed to the footer.
568	* Also checks for old export files laying around and deletes them (for security).
569	*
570	* @since Post Snippets 1.8
571	*
572	* @return string URL to the exported snippets
573	*/
574	function export_snippets() {
575	if ( isset($_POST['postsnippets_export']) ) {
576	$url = $this->create_export_file();
577	if ($url) {
578	define('PSURL', $url);
579	function psnippets_footer() {
580	$export .= '<script type="text/javascript">
581	document.location = \''.PSURL.'\';
582	</script>';
583	echo $export;
584	}
585	add_action('admin_footer', 'psnippets_footer', 10000);
586
587	} else {
588	$export .= 'Error: '.$url;
589	}
590	} else {
591	// Check if there is any old export files to delete
592	$dir = wp_upload_dir();
593	$upload_dir = $dir['basedir'] . '/';
594	chdir($upload_dir);
595	if (file_exists ( './post-snippets-export.zip' ) )
596	unlink('./post-snippets-export.zip');
597	}
598	}
599
600	/**
601	* Create a zipped filed containing all Post Snippets, for export.
602	*
603	* @since Post Snippets 1.8
604	*
605	* @return string URL to the exported snippets
606	*/
607	function create_export_file() {
608	$snippets = serialize(get_option($this->plugin_options));
609	$dir = wp_upload_dir();
610	$upload_dir = $dir['basedir'] . '/';
611	$upload_url = $dir['baseurl'] . '/';
612
613	// Open a file stream and write the serialized options to it.
614	if ( !$handle = fopen( $upload_dir.'post-snippets-export.cfg', 'w' ) )
615	die();
616	if ( !fwrite($handle, $snippets) )
617	die();
618	fclose($handle);
619
620	// Create a zip archive
621	require_once (ABSPATH . 'wp-admin/includes/class-pclzip.php');
622	chdir($upload_dir);
623	$zip = new PclZip('./post-snippets-export.zip');
624	$zipped = $zip->create('./post-snippets-export.cfg');
625
626	// Delete the snippet file
627	unlink('./post-snippets-export.cfg');
628
629	if (!$zipped)
630	return false;
631
632	return $upload_url.'post-snippets-export.zip';
633	}
634
635	/**
636	* Handles uploading of post snippets archive and import the snippets.
637	*
638	* @uses wp_handle_upload() in wp-admin/includes/file.php
639	* @since Post Snippets 1.8
640	*
641	* @return string HTML to handle the import
642	*/
643	function import_snippets() {
644	$import = '<br/><br/><strong>'.__( 'Import', 'post-snippets' ).'</strong><br/>';
645	if ( !isset($_FILES['postsnippets_import_file']) \|\| empty($_FILES['postsnippets_import_file']) ) {
646	$import .= '<p>'.__( 'Import snippets from a post-snippets-export.zip file. Importing overwrites any existing snippets.', 'post-snippets' ).'</p>';
647	$import .= '<form method="post" enctype="multipart/form-data">';
648	$import .= '<input type="file" name="postsnippets_import_file"/>';
649	$import .= '<input type="hidden" name="action" value="wp_handle_upload"/>';
650	$import .= '<input type="submit" class="button" value="'.__( 'Import Snippets', 'post-snippets' ).'"/>';
651	$import .= '</form>';
652	} else {
653	$file = wp_handle_upload( $_FILES['postsnippets_import_file'] );
654
655	if ( isset( $file['file'] ) && !is_wp_error($file) ) {
656	require_once (ABSPATH . 'wp-admin/includes/class-pclzip.php');
657	$zip = new PclZip( $file['file'] );
658	$dir = wp_upload_dir();
659	$upload_dir = $dir['basedir'] . '/';
660	chdir($upload_dir);
661	$unzipped = $zip->extract();
662
663	if ( $unzipped[0]['stored_filename'] == 'post-snippets-export.cfg' && $unzipped[0]['status'] == 'ok') {
664	// Delete the uploaded archive
665	unlink($file['file']);
666
667	$options = file_get_contents( $upload_dir.'post-snippets-export.cfg' ); // Returns false on failure, else the contents
668	if ($options)
669	update_option($this->plugin_options, unserialize($options));
670
671	// Delete the snippet file
672	unlink('./post-snippets-export.cfg');
673
674	$this->admin_message( __( 'Snippets have been updated.', 'post-snippets' ) );
675
676	$import .= '<p><strong>'.__( 'Snippets successfully imported.').'</strong></p>';
677	} else {
678	$import .= '<p><strong>'.__( 'Snippets could not be imported:').' '.__('Unzipping failed.').'</strong></p>';
679	}
680	} else {
681	if ( $file['error'] \|\| is_wp_error( $file ) )
682	$import .= '<p><strong>'.__( 'Snippets could not be imported:').' '.$file['error'].'</strong></p>';
683	else
684	$import .= '<p><strong>'.__( 'Snippets could not be imported:').' '.__('Upload failed.').'</strong></p>';
685	}
686	}
687	return $import;
688	}
689
690	// -------------------------------------------------------------------------
691	// Helpers
692	// -------------------------------------------------------------------------
693
694	/**
695	* Get __FILE__ with no symlinks.
696	*
697	* For development purposes mainly. Returns __FILE__ without resolved
698	* symlinks to be used when __FILE__ is needed while resolving symlinks
699	* breaks WP functionaly, so the actual WordPress path is returned instead.
700	* This makes it possible for all WordPress versions to point to the same
701	* plugin folder for faster testing of the plugin in different WordPress
702	* versions.
703	*
704	* @since Post Snippets 1.9
705	* @return The __FILE__ constant without resolved symlinks.
706	*/
707	private function get_FILE()
708	{
709	$dev_path = 'E:\Code\WordPress';
710	$result = strpos( __FILE__, $dev_path );
711
712	if ( $result === false ) {
713	return __FILE__;
714	} else {
715	return str_replace($dev_path, WP_PLUGIN_DIR, __FILE__);
716	}
717	}
718
719	/**
720	* Allow snippets to be retrieved directly from PHP.
721	*
722	* @since Post Snippets 1.8.9.1
723	*
724	* @param string $snippet_name
725	* The name of the snippet to retrieve
726	* @param string $snippet_vars
727	* The variables to pass to the snippet, formatted as a query string.
728	* @return string
729	* The Snippet
730	*/
731	public function get_snippet( $snippet_name, $snippet_vars = '' )
732	{
733	$snippets = get_option($this->plugin_options);
734	for ($i = 0; $i < count($snippets); $i++) {
735	if ($snippets[$i]['title'] == $snippet_name) {
736	parse_str( htmlspecialchars_decode($snippet_vars), $snippet_output );
737	$snippet = $snippets[$i]['snippet'];
738	$var_arr = explode(",",$snippets[$i]['vars']);
739
740	if ( !empty($var_arr[0]) ) {
741	for ($j = 0; $j < count($var_arr); $j++) {
742	$snippet = str_replace("{".$var_arr[$j]."}", $snippet_output[$var_arr[$j]], $snippet);
743	}
744	}
745	}
746	}
747	return $snippet;
748	}
749	}
750
751
752	// -----------------------------------------------------------------------------
753	// Start the plugin
754	// -----------------------------------------------------------------------------
755
756	// Check the host environment
757	$test_post_snippets_host = new Post_Snippets_Host_Environment();
758
759	// If environment is up to date, start the plugin
760	if($test_post_snippets_host->passed) {
761	// Load external classes
762	if (is_admin()) {
763	require plugin_dir_path(__FILE__).'classes/settings.php';
764	require plugin_dir_path(__FILE__).'classes/help.php';
765	}
766
767	add_action(
768	'plugins_loaded',
769	create_function(
770	'',
771	'global $post_snippets; $post_snippets = new Post_Snippets();'
772	)
773	);
774	}
775
776
777	/**
778	* Post Snippets Host Environment.
779	*
780	* Checks that the host environment fulfils the requirements of Post Snippets.
781	* This class is designed to work with PHP versions below 5, to make sure it's
782	* always executed.
783	*
784	* - PHP Version 5.2.4 is on par with the requirements for WordPress 3.3.
785	*
786	* @since Post Snippets 1.8.8
787	*/
788	class Post_Snippets_Host_Environment
789	{
790	// Minimum versions required
791	var $MIN_PHP_VERSION = '5.2.4';
792	var $MIN_WP_VERSION = '3.0';
793	var $passed = true;
794
795	/**
796	* Constructor.
797	*
798	* Checks PHP and WordPress versions. If any check failes, a system notice
799	* is added and $passed is set to fail, which can be checked before trying
800	* to create the main class.
801	*/
802	function Post_Snippets_Host_Environment()
803	{
804	// Check if PHP is too old
805	if (version_compare(PHP_VERSION, $this->MIN_PHP_VERSION, '<')) {
806	// Display notice
807	add_action( 'admin_notices', array(&$this, 'php_version_error') );
808	$this->passed = false;
809	}
810
811	// Check if WordPress is too old
812	global $wp_version;
813	if ( version_compare($wp_version, $this->MIN_WP_VERSION, '<') ) {
814	add_action( 'admin_notices', array(&$this, 'wp_version_error') );
815	$this->passed = false;
816	}
817	}
818
819	/**
820	* Displays a warning when installed on an old PHP version.
821	*/
822	function php_version_error() {
823	echo '<div class="error"><p><strong>';
824	printf(
825	'Error: Post Snippets requires PHP version %1$s or greater.<br/>'.
826	'Your installed PHP version: %2$s',
827	$this->MIN_PHP_VERSION, PHP_VERSION);
828	echo '</strong></p></div>';
829	}
830
831	/**
832	* Displays a warning when installed in an old Wordpress version.
833	*/
834	function wp_version_error() {
835	echo '<div class="error"><p><strong>';
836	printf(
837	'Error: Post Snippets requires WordPress version %s or greater.',
838	$this->MIN_WP_VERSION );
839	echo '</strong></p></div>';
840	}
841	}
842
843	// -----------------------------------------------------------------------------
844	// Helper functions
845	// -----------------------------------------------------------------------------
846
847	/**
848	* Allow snippets to be retrieved directly from PHP.
849	* This function is a wrapper for Post_Snippets::get_snippet().
850	*
851	* @since Post Snippets 1.6
852	*
853	* @param string $snippet_name
854	* The name of the snippet to retrieve
855	* @param string $snippet_vars
856	* The variables to pass to the snippet, formatted as a query string.
857	* @return string
858	* The Snippet
859	*/
860	function get_post_snippet( $snippet_name, $snippet_vars = '' ) {
861	global $post_snippets;
862	return $post_snippets->get_snippet( $snippet_name, $snippet_vars );
863	}
864