polylang / include / olt-manager.php

olt-manager.php in Polylang 3.7.3, at include/olt-manager.php

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1	<?php
2	/**
3	* @package Polylang
4	*/
5
6	/**
7	* It is best practice that plugins do nothing before `plugins_loaded` is fired.
8	* So it is what Polylang intends to do.
9	* But some plugins load their textdomain as soon as loaded, thus before `plugins_loaded` is fired.
10	* This class defers textdomain loading until the language is defined either in a `plugins_loaded` action
11	* or in a `wp` action (when the language is set from content on frontend).
12	*
13	* @since 1.2
14	*/
15	class PLL_OLT_Manager {
16	/**
17	* Singleton instance
18	*
19	* @var PLL_OLT_Manager\|null
20	*/
21	protected static $instance;
22
23	/**
24	* Constructor: setups relevant filters.
25	*
26	* @since 1.2
27	*/
28	public function __construct() {
29	// Allows Polylang to be the first plugin loaded ;-)
30	add_filter( 'pre_update_option_active_plugins', array( $this, 'make_polylang_first' ) );
31	add_filter( 'pre_update_option_active_sitewide_plugins', array( $this, 'make_polylang_first' ) );
32
33	// Overriding load text domain only on front since WP 4.7.
34	if ( ( is_admin() && ! Polylang::is_ajax_on_front() ) \|\| Polylang::is_rest_request() ) {
35	return;
36	}
37
38	// Filters for text domain management.
39	add_filter( 'load_textdomain_mofile', '__return_empty_string' );
40
41	// Loads text domains.
42	add_action( 'pll_language_defined', array( $this, 'load_textdomains' ), 2 ); // After PLL_Frontend::pll_language_defined.
43	add_action( 'pll_no_language_defined', array( $this, 'load_textdomains' ) );
44	}
45
46	/**
47	* Access to the single instance of the class
48	*
49	* @since 1.7
50	*
51	* @return PLL_OLT_Manager
52	*/
53	public static function instance() {
54	if ( empty( self::$instance ) ) {
55	self::$instance = new self();
56	}
57
58	return self::$instance;
59	}
60
61	/**
62	* Loads textdomains.
63	*
64	* @since 0.1
65	*
66	* @return void
67	*/
68	public function load_textdomains() {
69	// Our load_textdomain_mofile filter has done its job. let's remove it to enable translation.
70	remove_filter( 'load_textdomain_mofile', '__return_empty_string' );
71
72	$GLOBALS['l10n'] = array();
73	$new_locale = get_locale();
74
75	load_default_textdomain( $new_locale );
76
77	// Act only if the language has not been set early (before default textdomain loading and $wp_locale creation).
78	if ( ! empty( $GLOBALS['wp_locale'] ) ) {
79	// Reinitializes wp_locale for weekdays and months.
80	unset( $GLOBALS['wp_locale'] );
81	$GLOBALS['wp_locale'] = new WP_Locale();
82	}
83
84	if ( ! empty( $GLOBALS['wp_locale_switcher'] ) ) {
85	/** This action is documented in wp-includes/class-wp-locale-switcher.php */
86	do_action( 'change_locale', $new_locale );
87	}
88
89	do_action_deprecated( 'pll_translate_labels', array(), '3.7', 'change_locale' );
90	}
91
92	/**
93	* Allows Polylang to be the first plugin loaded ;-).
94	*
95	* @since 1.2
96	*
97	* @param string[] $plugins List of active plugins.
98	* @return string[] List of active plugins.
99	*/
100	public function make_polylang_first( $plugins ) {
101	if ( $key = array_search( POLYLANG_BASENAME, $plugins ) ) {
102	unset( $plugins[ $key ] );
103	array_unshift( $plugins, POLYLANG_BASENAME );
104	}
105	return $plugins;
106	}
107	}
108