polylang / uninstall.php

uninstall.php in Polylang 2.2, at uninstall.php

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1	<?php
2
3	if ( ! defined( 'WP_UNINSTALL_PLUGIN' ) ) { // If uninstall not called from WordPress exit
4	exit();
5	}
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	/**
37	* Removes ALL plugin data
38	* only when the relevant option is active
39	*
40	* @since 0.5
41	*/
42	function uninstall() {
43	$options = get_option( 'polylang' );
44
45	if ( empty( $options['uninstall'] ) ) {
46	return;
47	}
48
49	// Suppress data of the old model < 1.2
50	// FIXME: to remove when support for v1.1.6 will be dropped
51	global $wpdb;
52	$wpdb->termmeta = $wpdb->prefix . 'termmeta'; // registers the termmeta table in wpdb
53
54	// Do nothing if the termmeta table does not exists
55	if ( count( $wpdb->get_results( "SHOW TABLES LIKE '$wpdb->termmeta'" ) ) ) {
56	$wpdb->query( "DELETE FROM $wpdb->postmeta WHERE meta_key = '_translations'" );
57	$wpdb->query( "DELETE FROM $wpdb->termmeta WHERE meta_key = '_language'" );
58	$wpdb->query( "DELETE FROM $wpdb->termmeta WHERE meta_key = '_rtl'" );
59	$wpdb->query( "DELETE FROM $wpdb->termmeta WHERE meta_key = '_translations'" );
60	}
61
62	// Need to register the taxonomies
63	$pll_taxonomies = array( 'language', 'term_language', 'post_translations', 'term_translations' );
64	foreach ( $pll_taxonomies as $taxonomy ) {
65	register_taxonomy( $taxonomy, null , array( 'label' => false, 'public' => false, 'query_var' => false, 'rewrite' => false ) );
66	}
67
68	$languages = get_terms( 'language', array( 'hide_empty' => false ) );
69
70	// Delete users options
71	foreach ( get_users( array( 'fields' => 'ID' ) ) as $user_id ) {
72	delete_user_meta( $user_id, 'pll_filter_content' );
73	foreach ( $languages as $lang ) {
74	delete_user_meta( $user_id, 'description_' . $lang->slug );
75	}
76	}
77
78	// Delete menu language switchers
79	$ids = get_posts( array(
80	'post_type' => 'nav_menu_item',
81	'numberposts' => -1,
82	'nopaging' => true,
83	'fields' => 'ids',
84	'meta_key' => '_pll_menu_item',
85	) );
86
87	foreach ( $ids as $id ) {
88	wp_delete_post( $id, true );
89	}
90
91	// Delete the strings translations ( <1.2 )
92	// FIXME: to remove when support for v1.1.6 will be dropped
93	foreach ( $languages as $lang ) {
94	delete_option( 'polylang_mo' . $lang->term_id );
95	}
96
97	// Delete the strings translations 1.2+
98	register_post_type( 'polylang_mo', array( 'rewrite' => false, 'query_var' => false ) );
99	$ids = get_posts( array(
100	'post_type' => 'polylang_mo',
101	'numberposts' => -1,
102	'nopaging' => true,
103	'fields' => 'ids',
104	) );
105	foreach ( $ids as $id ) {
106	wp_delete_post( $id, true );
107	}
108
109	// Delete all what is related to languages and translations
110	foreach ( get_terms( $pll_taxonomies, array( 'hide_empty' => false ) ) as $term ) {
111	$term_ids[] = (int) $term->term_id;
112	$tt_ids[] = (int) $term->term_taxonomy_id;
113	}
114
115	if ( ! empty( $term_ids ) ) {
116	$term_ids = array_unique( $term_ids );
117	$wpdb->query( "DELETE FROM $wpdb->terms WHERE term_id IN ( " . implode( ',', $term_ids ) . ' )' );
118	$wpdb->query( "DELETE FROM $wpdb->term_taxonomy WHERE term_id IN ( " . implode( ',', $term_ids ) . ' )' );
119	}
120
121	if ( ! empty( $tt_ids ) ) {
122	$tt_ids = array_unique( $tt_ids );
123	$wpdb->query( "DELETE FROM $wpdb->term_relationships WHERE term_taxonomy_id IN ( " . implode( ',', $tt_ids ) . ' )' );
124	}
125
126	// Delete options
127	delete_option( 'polylang' );
128	delete_option( 'widget_polylang' ); // Automatically created by WP
129	delete_option( 'polylang_wpml_strings' ); // Strings registered with icl_register_string
130	delete_option( 'polylang_licenses' );
131
132	// Delete transients
133	delete_transient( 'pll_languages_list' );
134	delete_transient( 'pll_upgrade_1_4' );
135	delete_transient( 'pll_translated_slugs' );
136	}
137	}
138
139	new PLL_Uninstall();
140