polylang / uninstall.php

uninstall.php in Polylang 1.8, 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	/*
9	* manages Polylang uninstallation
10	* the goal is to remove ALL Polylang related data in db
11	*
12	* @since 0.5
13	*/
14	class PLL_Uninstall {
15
16	/*
17	* constructor: manages uninstall for multisite
18	*
19	* @since 0.5
20	*/
21	function __construct() {
22	global $wpdb;
23
24	// check if it is a multisite uninstall - if so, run the uninstall function for each blog id
25	if ( is_multisite() ) {
26	foreach ( $wpdb->get_col( "SELECT blog_id FROM $wpdb->blogs" ) as $blog_id ) {
27	switch_to_blog( $blog_id );
28	$this->uninstall();
29	}
30	restore_current_blog();
31	}
32	else {
33	$this->uninstall();
34	}
35	}
36
37	/*
38	* removes ALL plugin data
39	* only when the relevant option is active
40	*
41	* @since 0.5
42	*/
43	function uninstall() {
44	$options = get_option( 'polylang' );
45
46	if ( empty( $options['uninstall'] ) ) {
47	return;
48	}
49
50	// suppress data of the old model < 1.2
51	// FIXME: to remove when support for v1.1.6 will be dropped
52	global $wpdb;
53	$wpdb->termmeta = $wpdb->prefix . 'termmeta'; // registers the termmeta table in wpdb
54
55	// do nothing if the termmeta table does not exists
56	if ( count( $wpdb->get_results( "SHOW TABLES LIKE '$wpdb->termmeta'" ) ) ) {
57	$wpdb->query( "DELETE FROM $wpdb->postmeta WHERE meta_key = '_translations'" );
58	$wpdb->query( "DELETE FROM $wpdb->termmeta WHERE meta_key = '_language'" );
59	$wpdb->query( "DELETE FROM $wpdb->termmeta WHERE meta_key = '_rtl'" );
60	$wpdb->query( "DELETE FROM $wpdb->termmeta WHERE meta_key = '_translations'" );
61	}
62
63	// need to register the taxonomies
64	$pll_taxonomies = array( 'language', 'term_language', 'post_translations', 'term_translations' );
65	foreach ( $pll_taxonomies as $taxonomy ) {
66	register_taxonomy( $taxonomy, null , array( 'label' => false, 'public' => false, 'query_var' => false, 'rewrite' => false ) );
67	}
68
69	$languages = get_terms( 'language', array( 'hide_empty' => false ) );
70
71	// delete users options
72	foreach ( get_users( array( 'fields' => 'ID' ) ) as $user_id ) {
73	delete_user_meta( $user_id, 'user_lang' );
74	delete_user_meta( $user_id, 'pll_filter_content' );
75	foreach ( $languages as $lang ) {
76	delete_user_meta( $user_id, 'description_' . $lang->slug );
77	}
78	}
79
80	// delete menu language switchers
81	$ids = get_posts( array(
82	'post_type' => 'nav_menu_item',
83	'numberposts' => -1,
84	'nopaging' => true,
85	'fields' => 'ids',
86	'meta_key' => '_pll_menu_item',
87	) );
88
89	foreach ( $ids as $id ) {
90	wp_delete_post( $id, true );
91	}
92
93	// delete the strings translations ( <1.2 )
94	// FIXME: to remove when support for v1.1.6 will be dropped
95	foreach ( $languages as $lang ) {
96	delete_option( 'polylang_mo' . $lang->term_id );
97	}
98
99	// delete the strings translations 1.2+
100	register_post_type( 'polylang_mo', array( 'rewrite' => false, 'query_var' => false ) );
101	$ids = get_posts( array(
102	'post_type' => 'polylang_mo',
103	'numberposts' => -1,
104	'nopaging' => true,
105	'fields' => 'ids',
106	) );
107	foreach ( $ids as $id ) {
108	wp_delete_post( $id, true );
109	}
110
111	// delete all what is related to languages and translations
112	foreach ( get_terms( $pll_taxonomies, array( 'hide_empty' => false ) ) as $term ) {
113	$term_ids[] = (int) $term->term_id;
114	$tt_ids[] = (int) $term->term_taxonomy_id;
115	}
116
117	if ( ! empty( $term_ids ) ) {
118	$term_ids = array_unique( $term_ids );
119	$wpdb->query( "DELETE FROM $wpdb->terms WHERE term_id IN ( " . implode( ',', $term_ids ) . " )" );
120	$wpdb->query( "DELETE FROM $wpdb->term_taxonomy WHERE term_id IN ( " . implode( ',', $term_ids ) . " )" );
121	}
122
123	if ( ! empty( $tt_ids ) ) {
124	$tt_ids = array_unique( $tt_ids );
125	$wpdb->query( "DELETE FROM $wpdb->term_relationships WHERE term_taxonomy_id IN ( " . implode( ',', $tt_ids ) . " )" );
126	}
127
128	// delete options
129	delete_option( 'polylang' );
130	delete_option( 'widget_polylang' ); // automatically created by WP
131	delete_option( 'polylang_wpml_strings' ); // strings registered with icl_register_string
132
133	//delete transients
134	delete_transient( 'pll_languages_list' );
135	delete_transient( 'pll_upgrade_1_4' );
136	}
137	}
138
139	new PLL_Uninstall();
140