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<?php
/**
* @package Polylang
*/
use WP_Syntex\Polylang\Options\Options;
use WP_Syntex\Polylang\Options\Registry as Options_Registry;
if ( ! defined( 'ABSPATH' ) ) {
exit; // Don't access directly
}
// Default directory to store user data such as custom flags
if ( ! defined( 'PLL_LOCAL_DIR' ) ) {
define( 'PLL_LOCAL_DIR', WP_CONTENT_DIR . '/polylang' );
}
// Includes local config file if exists
if ( is_readable( PLL_LOCAL_DIR . '/pll-config.php' ) ) {
include_once PLL_LOCAL_DIR . '/pll-config.php';
}
/**
* Controls the plugin, as well as activation, and deactivation
*
* @since 0.1
*
* @template TPLLClass of PLL_Base
*/
class Polylang {
/**
* Constructor
*
* @since 0.1
*/
public function __construct() {
require_once __DIR__ . '/functions.php'; // VIP functions
// Plugin initialization
// Take no action before all plugins are loaded
add_action( 'plugins_loaded', array( $this, 'init' ), 1 );
// Override load text domain waiting for the language to be defined
// Here for plugins which load text domain as soon as loaded :(
if ( ! defined( 'PLL_OLT' ) || PLL_OLT ) {
PLL_OLT_Manager::instance();
}
/*
* Loads the compatibility with some plugins and themes.
* Loaded as soon as possible as we may need to act before other plugins are loaded.
*/
if ( ! defined( 'PLL_PLUGINS_COMPAT' ) || PLL_PLUGINS_COMPAT ) {
PLL_Integrations::instance();
}
}
/**
* Tells whether the current request is an ajax request on frontend or not
*
* @since 2.2
*
* @return bool
*/
public static function is_ajax_on_front() {
// Special test for plupload which does not use jquery ajax and thus does not pass our ajax prefilter
// Special test for customize_save done in frontend but for which we want to load the admin
$in = isset( $_REQUEST['action'] ) && in_array( sanitize_key( $_REQUEST['action'] ), array( 'upload-attachment', 'customize_save' ) ); // phpcs:ignore WordPress.Security.NonceVerification
$is_ajax_on_front = wp_doing_ajax() && empty( $_REQUEST['pll_ajax_backend'] ) && ! $in; // phpcs:ignore WordPress.Security.NonceVerification
/**
* Filters whether the current request is an ajax request on front.
*
* @since 2.3
*
* @param bool $is_ajax_on_front Whether the current request is an ajax request on front.
*/
return apply_filters( 'pll_is_ajax_on_front', $is_ajax_on_front );
}
/**
* Is the current request a REST API request?
* Inspired by WP::parse_request()
* Needed because at this point, the constant REST_REQUEST is not defined yet
*
* @since 2.4.1
*
* @return bool
*/
public static function is_rest_request() {
// Handle pretty permalinks.
$home_path = trim( (string) wp_parse_url( home_url(), PHP_URL_PATH ), '/' );
$home_path_regex = sprintf( '|^%s|i', preg_quote( $home_path, '|' ) );
$req_uri = trim( (string) wp_parse_url( pll_get_requested_url(), PHP_URL_PATH ), '/' );
$req_uri = (string) preg_replace( $home_path_regex, '', $req_uri );
$req_uri = trim( $req_uri, '/' );
$req_uri = str_replace( 'index.php', '', $req_uri );
$req_uri = trim( $req_uri, '/' );
// And also test rest_route query string parameter is not empty for plain permalinks.
$query_string = array();
wp_parse_str( (string) wp_parse_url( pll_get_requested_url(), PHP_URL_QUERY ), $query_string );
$rest_route = isset( $query_string['rest_route'] ) && is_string( $query_string['rest_route'] ) ? trim( $query_string['rest_route'], '/' ) : false;
return 0 === strpos( $req_uri, rest_get_url_prefix() . '/' ) || ! empty( $rest_route );
}
/**
* Tells if we are in the wizard process.
*
* @since 2.7
*
* @return bool
*/
public static function is_wizard() {
return isset( $_GET['page'] ) && ! empty( $_GET['page'] ) && 'mlang_wizard' === sanitize_key( $_GET['page'] ); // phpcs:ignore WordPress.Security.NonceVerification
}
/**
* Defines constants
* May be overridden by a plugin if set before plugins_loaded, 1
*
* @since 1.6
*
* @return void
*/
public static function define_constants() {
// Cookie name. no cookie will be used if set to false
if ( ! defined( 'PLL_COOKIE' ) ) {
define( 'PLL_COOKIE', 'pll_language' );
}
// Backward compatibility with Polylang < 2.3
if ( ! defined( 'PLL_AJAX_ON_FRONT' ) ) {
define( 'PLL_AJAX_ON_FRONT', self::is_ajax_on_front() );
}
// Admin
if ( ! defined( 'PLL_ADMIN' ) ) {
define( 'PLL_ADMIN', wp_doing_cron() || ( defined( 'WP_CLI' ) && WP_CLI ) || ( is_admin() && ! PLL_AJAX_ON_FRONT ) );
}
// Settings page whatever the tab except for the wizard which needs to be an admin process.
if ( ! defined( 'PLL_SETTINGS' ) ) {
define( 'PLL_SETTINGS', is_admin() && ( ( isset( $_GET['page'] ) && 0 === strpos( sanitize_key( $_GET['page'] ), 'mlang' ) && ! self::is_wizard() ) || ! empty( $_REQUEST['pll_ajax_settings'] ) ) ); // phpcs:ignore WordPress.Security.NonceVerification
}
}
/**
* Polylang initialization
* setups models and separate admin and frontend
*
* @since 1.2
*
* @return void
*/
public function init() {
self::define_constants();
// Plugin options.
add_action( 'pll_init_options_for_blog', array( Options_Registry::class, 'register' ) );
$options = new Options();
// Plugin upgrade
if ( ! empty( $options['version'] ) ) {
if ( version_compare( $options['version'], POLYLANG_VERSION, '<' ) ) {
$upgrade = new PLL_Upgrade( $options );
if ( ! $upgrade->upgrade() ) { // If the version is too old
return;
}
}
} else {
// In some edge cases, it's possible that no options were found in the database.
$options['version'] = POLYLANG_VERSION;
}
/**
* Filter the model class to use
* /!\ this filter is fired *before* the $polylang object is available
*
* @since 1.5
*
* @param string $class either PLL_Model or PLL_Admin_Model
*/
$class = apply_filters( 'pll_model', PLL_SETTINGS || self::is_wizard() ? 'PLL_Admin_Model' : 'PLL_Model' );
/** @var PLL_Model $model */
$model = new $class( $options );
if ( ! $model->has_languages() ) {
/**
* Fires when no language has been defined yet
* Used to load overridden textdomains
*
* @since 1.2
*/
do_action( 'pll_no_language_defined' );
}
$class = '';
if ( PLL_SETTINGS ) {
$class = 'PLL_Settings';
} elseif ( PLL_ADMIN ) {
$class = 'PLL_Admin';
} elseif ( self::is_rest_request() ) {
$class = 'PLL_REST_Request';
} elseif ( $model->has_languages() ) {
$class = 'PLL_Frontend';
}
/**
* Filters the class to use to instantiate the $polylang object
*
* @since 2.6
*
* @param string $class A class name.
*/
$class = apply_filters( 'pll_context', $class );
if ( ! empty( $class ) ) {
/** @phpstan-var class-string<TPLLClass> $class */
$this->init_context( $class, $model );
}
}
/**
* Polylang initialization.
* Setups the Polylang Context, loads the modules and init Polylang.
*
* @since 3.6
*
* @param string $class The class name.
* @param PLL_Model $model Instance of PLL_Model.
* @return PLL_Base
*
* @phpstan-param class-string<TPLLClass> $class
* @phpstan-return TPLLClass
*/
public function init_context( string $class, PLL_Model $model ): PLL_Base {
global $polylang;
$links_model = $model->get_links_model();
$polylang = new $class( $links_model );
/**
* Fires after Polylang's model init.
* This is the best place to register a custom table (see `PLL_Model`'s constructor).
* /!\ This hook is fired *before* the $polylang object is available.
* /!\ The languages are also not available yet.
*
* @since 3.4
*
* @param PLL_Model $model Polylang model.
*/
do_action( 'pll_model_init', $model );
$model->maybe_create_language_terms();
/**
* Fires after the $polylang object is created and before the API is loaded
*
* @since 2.0
*
* @param object $polylang
*/
do_action_ref_array( 'pll_pre_init', array( &$polylang ) );
// Loads the API
require_once POLYLANG_DIR . '/src/api.php';
// Loads the modules.
$load_scripts = require POLYLANG_DIR . '/src/modules/module-build.php';
foreach ( $load_scripts as $load_script ) {
require_once POLYLANG_DIR . "/src/modules/{$load_script}/load.php";
}
$polylang->init();
/**
* Fires after the $polylang object and the API is loaded
*
* @since 1.7
*
* @param object $polylang
*/
do_action_ref_array( 'pll_init', array( &$polylang ) );
return $polylang;
}
}