polylang / uninstall.php

uninstall.php in Polylang 1.6, at uninstall.php

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1	<?php
2
3	//if uninstall not called from WordPress exit
4	if (!defined('WP_UNINSTALL_PLUGIN'))
5	exit();
6
7	/*
8	* manages Polylang uninstallation
9	* the goal is to remove ALL Polylang related data in db
10	*
11	* @since 0.5
12	*/
13	class PLL_Uninstall {
14
15	/*
16	* constructor: manages uninstall for multisite
17	*
18	* @since 0.5
19	*/
20	function __construct() {
21	global $wpdb;
22
23	// check if it is a multisite uninstall - if so, run the uninstall function for each blog id
24	if (is_multisite()) {
25	foreach ($wpdb->get_col("SELECT blog_id FROM $wpdb->blogs") as $blog_id) {
26	switch_to_blog($blog_id);
27	$this->uninstall();
28	}
29	restore_current_blog();
30	}
31	else
32	$this->uninstall();
33	}
34
35	/*
36	* removes ALL plugin data
37	*
38	* @since 0.5
39	*/
40	function uninstall() {
41	// suppress data of the old model < 1.2
42	// FIXME: to remove when support for v1.1.6 will be dropped
43	global $wpdb;
44	$wpdb->termmeta = $wpdb->prefix . 'termmeta'; // registers the termmeta table in wpdb
45
46	// do nothing if the termmeta table does not exists
47	if (count($wpdb->get_results("SHOW TABLES LIKE '$wpdb->termmeta'"))) {
48	$wpdb->query("DELETE FROM $wpdb->postmeta WHERE meta_key = '_translations'");
49	$wpdb->query("DELETE FROM $wpdb->termmeta WHERE meta_key = '_language'");
50	$wpdb->query("DELETE FROM $wpdb->termmeta WHERE meta_key = '_rtl'");
51	$wpdb->query("DELETE FROM $wpdb->termmeta WHERE meta_key = '_translations'");
52
53	// delete the termmeta table only if it is empty as other plugins may use it
54	if (!$wpdb->get_var("SELECT COUNT(*) FROM $wpdb->termmeta;"))
55	$wpdb->query("DROP TABLE $wpdb->termmeta;");
56	}
57
58
59	// need to register the taxonomies
60	$pll_taxonomies = array('language', 'term_language', 'post_translations', 'term_translations');
61	foreach ($pll_taxonomies as $taxonomy)
62	register_taxonomy($taxonomy, null , array('label' => false, 'public' => false, 'query_var' => false, 'rewrite' => false));
63
64
65	$languages = get_terms('language', array('hide_empty'=>false));
66
67	// delete users options
68	foreach (get_users(array('fields' => 'ID')) as $user_id) {
69	delete_user_meta($user_id, 'user_lang');
70	delete_user_meta($user_id, 'pll_filter_content');
71	foreach ($languages as $lang)
72	delete_user_meta($user_id, 'description_'.$lang->slug);
73	}
74
75	// delete menu language switchers
76	$ids = get_posts(array(
77	'post_type' => 'nav_menu_item',
78	'numberposts' => -1,
79	'nopaging' => true,
80	'fields' => 'ids',
81	'meta_key' => '_pll_menu_item'
82	));
83
84	foreach ($ids as $id)
85	wp_delete_post($id, true);
86
87	// delete the strings translations (<1.2)
88	// FIXME: to remove when support for v1.1.6 will be dropped
89	foreach ($languages as $lang)
90	delete_option('polylang_mo'.$lang->term_id);
91
92	// delete the strings translations 1.2+
93	register_post_type('polylang_mo', array('rewrite' => false, 'query_var' => false));
94	$ids = get_posts(array(
95	'post_type' => 'polylang_mo',
96	'numberposts' => -1,
97	'nopaging' => true,
98	'fields' => 'ids',
99	));
100	foreach ($ids as $id)
101	wp_delete_post($id, true);
102
103	// delete all what is related to languages and translations
104	foreach (get_terms($pll_taxonomies, array('hide_empty'=>false)) as $term) {
105	$term_ids[] = (int) $term->term_id;
106	$tt_ids[] = (int) $term->term_taxonomy_id;
107	}
108
109	if (!empty($term_ids)) {
110	$term_ids = array_unique($term_ids);
111	$wpdb->query("DELETE FROM $wpdb->terms WHERE term_id IN (" . implode(',', $term_ids) . ")");
112	$wpdb->query("DELETE FROM $wpdb->term_taxonomy WHERE term_id IN (" . implode(',', $term_ids) . ")");
113	}
114
115	if (!empty($tt_ids)) {
116	$tt_ids = array_unique($tt_ids);
117	$wpdb->query("DELETE FROM $wpdb->term_relationships WHERE term_taxonomy_id IN (" . implode(',', $tt_ids) . ")");
118	}
119
120	// delete options
121	delete_option('polylang');
122	delete_option('widget_polylang'); // automatically created by WP
123	delete_option('polylang_wpml_strings'); // strings registered with icl_register_string
124
125	//delete transients
126	delete_transient('pll_languages_list');
127	delete_transient('pll_upgrade_1_4');
128	}
129	}
130
131	new PLL_Uninstall();
132