polylang / uninstall.php

uninstall.php in Polylang 1.4, at uninstall.php

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1	<?php
2
3	/*
4	* manages Polylang uninstallation
5	* the goal is to remove ALL Polylang related data in db
6	*
7	* @since 0.5
8	*/
9	class PLL_Uninstall {
10
11	/*
12	* constructor: manages uninstall for multisite
13	*
14	* @since 0.5
15	*/
16	function __construct() {
17	global $wpdb;
18
19	// check if it is a multisite uninstall - if so, run the uninstall function for each blog id
20	if (is_multisite()) {
21	foreach ($wpdb->get_col("SELECT blog_id FROM $wpdb->blogs") as $blog_id) {
22	switch_to_blog($blog_id);
23	$this->uninstall();
24	}
25	restore_current_blog();
26	}
27	else
28	$this->uninstall();
29	}
30
31	/*
32	* removes ALL plugin data
33	*
34	* @since 0.5
35	*/
36	function uninstall() {
37	// suppress data of the old model < 1.2
38	// FIXME: to remove when support for v1.1.6 will be dropped
39	global $wpdb;
40	$wpdb->termmeta = $wpdb->prefix . 'termmeta'; // registers the termmeta table in wpdb
41
42	// do nothing if the termmeta table does not exists
43	if (count($wpdb->get_results("SHOW TABLES LIKE '$wpdb->termmeta'"))) {
44	$wpdb->query("DELETE FROM $wpdb->postmeta WHERE meta_key = '_translations'");
45	$wpdb->query("DELETE FROM $wpdb->termmeta WHERE meta_key = '_language'");
46	$wpdb->query("DELETE FROM $wpdb->termmeta WHERE meta_key = '_rtl'");
47	$wpdb->query("DELETE FROM $wpdb->termmeta WHERE meta_key = '_translations'");
48
49	// delete the termmeta table only if it is empty as other plugins may use it
50	if (!$wpdb->get_var("SELECT COUNT(*) FROM $wpdb->termmeta;"))
51	$wpdb->query("DROP TABLE $wpdb->termmeta;");
52	}
53
54
55	// need to register the taxonomies
56	$pll_taxonomies = array('language', 'term_language', 'post_translations', 'term_translations');
57	foreach ($pll_taxonomies as $taxonomy)
58	register_taxonomy($taxonomy, null , array('label' => false, 'public' => false, 'query_var' => false, 'rewrite' => false));
59
60
61	$languages = get_terms('language', array('hide_empty'=>false));
62
63	// delete users options
64	foreach (get_users(array('fields' => 'ID')) as $user_id) {
65	delete_user_meta($user_id, 'user_lang');
66	delete_user_meta($user_id, 'pll_filter_content');
67	foreach ($languages as $lang)
68	delete_user_meta($user_id, 'description_'.$lang->slug);
69	}
70
71	// delete menu language switchers
72	$ids = get_posts(array(
73	'post_type' => 'nav_menu_item',
74	'numberposts' => -1,
75	'nopaging' => true,
76	'fields' => 'ids',
77	'meta_key' => '_pll_menu_item'
78	));
79
80	foreach ($ids as $id)
81	wp_delete_post($id, true);
82
83	// delete the strings translations (<1.2)
84	// FIXME: to remove when support for v1.1.6 will be dropped
85	foreach ($languages as $lang)
86	delete_option('polylang_mo'.$lang->term_id);
87
88	// delete the strings translations 1.2+
89	register_post_type('polylang_mo', array('rewrite' => false, 'query_var' => false));
90	$ids = get_posts(array(
91	'post_type' => 'polylang_mo',
92	'numberposts' => -1,
93	'nopaging' => true,
94	'fields' => 'ids',
95	));
96	foreach ($ids as $id)
97	wp_delete_post($id, true);
98
99	// delete all what is related to languages and translations
100	foreach (get_terms($pll_taxonomies, array('hide_empty'=>false)) as $term) {
101	$term_ids[] = (int) $term->term_id;
102	$tt_ids[] = (int) $term->term_taxonomy_id;
103	}
104
105	if (!empty($term_ids)) {
106	$term_ids = array_unique($term_ids);
107	$wpdb->query("DELETE FROM $wpdb->terms WHERE term_id IN (" . implode(',', $term_ids) . ")");
108	$wpdb->query("DELETE FROM $wpdb->term_taxonomy WHERE term_id IN (" . implode(',', $term_ids) . ")");
109	}
110
111	if (!empty($tt_ids)) {
112	$tt_ids = array_unique($tt_ids);
113	$wpdb->query("DELETE FROM $wpdb->term_relationships WHERE term_taxonomy_id IN (" . implode(',', $tt_ids) . ")");
114	}
115
116	// delete options
117	delete_option('polylang');
118	delete_option('widget_polylang'); // automatically created by WP
119	delete_option('polylang_wpml_strings'); // strings registered with icl_register_string
120
121	//delete transients
122	delete_transient('pll_languages_list');
123	delete_transient('pll_upgrade_1_4');
124	}
125	}
126
127	new PLL_Uninstall();
128