Current File : /home/dopla/www/wp-content/plugins/polylang/frontend/choose-lang.php
<?php
/**
* Base class to choose the language
*
* @since 1.2
*/
abstract class PLL_Choose_Lang {
public $links_model, $model, $options;
public $curlang;
/**
* Constructor
*
* @since 1.2
*
* @param object $polylang
*/
public function __construct( &$polylang ) {
$this->links_model = &$polylang->links_model;
$this->model = &$polylang->model;
$this->options = &$polylang->options;
$this->curlang = &$polylang->curlang;
}
/**
* Sets the language for ajax requests
* and setup actions
* Any child class must call this method if it overrides it
*
* @since 1.8
*/
public function init() {
if ( Polylang::is_ajax_on_front() || false === stripos( $_SERVER['SCRIPT_FILENAME'], 'index.php' ) ) {
$this->set_language( empty( $_REQUEST['lang'] ) ? $this->get_preferred_language() : $this->model->get_language( $_REQUEST['lang'] ) );
}
add_action( 'pre_comment_on_post', array( $this, 'pre_comment_on_post' ) ); // sets the language of comment
add_action( 'parse_query', array( $this, 'parse_main_query' ), 2 ); // sets the language in special cases
add_action( 'wp', array( $this, 'maybe_setcookie' ), 7 );
}
/**
* Writes language cookie
* Loads user defined translations
* Fires the action 'pll_language_defined'
*
* @since 1.2
*
* @param object $curlang current language
*/
protected function set_language( $curlang ) {
// Don't set the language a second time
if ( isset( $this->curlang ) ) {
return;
}
// Final check in case $curlang has an unexpected value
// See https://wordpress.org/support/topic/detect-browser-language-sometimes-setting-null-language
$this->curlang = ( $curlang instanceof PLL_Language ) ? $curlang : $this->model->get_language( $this->options['default_lang'] );
$GLOBALS['text_direction'] = $this->curlang->is_rtl ? 'rtl' : 'ltr';
/**
* Fires when the current language is defined
*
* @since 0.9.5
*
* @param string $slug current language code
* @param object $curlang current language object
*/
do_action( 'pll_language_defined', $this->curlang->slug, $this->curlang );
}
/**
* Set a cookie to remember the language.
* Setting PLL_COOKIE to false will disable cookie although it will break some functionalities
*
* @since 1.5
*/
public function maybe_setcookie() {
// Don't set cookie in javascript when a cache plugin is active
// Check headers have not been sent to avoid ugly error
// Cookie domain must be set to false for localhost ( default value for COOKIE_DOMAIN ) thanks to Stephen Harris.
if ( ! pll_is_cache_active() && ! headers_sent() && PLL_COOKIE !== false && ! empty( $this->curlang ) && ( ! isset( $_COOKIE[ PLL_COOKIE ] ) || $_COOKIE[ PLL_COOKIE ] != $this->curlang->slug ) && ! is_404() ) {
/**
* Filter the Polylang cookie duration
* /!\ this filter may be fired *before* the theme is loaded
*
* @since 1.8
*
* @param int $duration cookie duration in seconds
*/
$expiration = apply_filters( 'pll_cookie_expiration', YEAR_IN_SECONDS );
setcookie(
PLL_COOKIE,
$this->curlang->slug,
time() + $expiration,
COOKIEPATH,
2 == $this->options['force_lang'] ? parse_url( $this->links_model->home, PHP_URL_HOST ) : COOKIE_DOMAIN,
is_ssl()
);
}
}
/**
* Get the preferred language according to the browser preferences
* Code adapted from http://www.thefutureoftheweb.com/blog/use-accept-language-header
*
* @since 1.8
*
* @return string|bool the preferred language slug or false
*/
public function get_preferred_browser_language() {
$accept_langs = array();
if ( isset( $_SERVER['HTTP_ACCEPT_LANGUAGE'] ) ) {
// Break up string into pieces ( languages and q factors )
preg_match_all( '/([a-z]{1,8}(-[a-z]{1,8})?)\s*(;\s*q\s*=\s*((?>1|0)(?>\.[0-9]+)?))?/i', $_SERVER['HTTP_ACCEPT_LANGUAGE'], $lang_parse );
$k = $lang_parse[1];
$v = $lang_parse[4];
if ( $n = count( $k ) ) {
// Set default to 1 for any without q factor
foreach ( $v as $key => $val ) {
if ( '' === $val || (float) $val > 1 ) {
$v[ $key ] = 1;
}
}
// Bubble sort ( need a stable sort for Android, so can't use a PHP sort function )
if ( $n > 1 ) {
for ( $i = 2; $i <= $n; $i++ ) {
for ( $j = 0; $j <= $n - 2; $j++ ) {
if ( $v[ $j ] < $v[ $j + 1 ] ) {
// Swap values
$temp = $v[ $j ];
$v[ $j ] = $v[ $j + 1 ];
$v[ $j + 1 ] = $temp;
// Swap keys
$temp = $k[ $j ];
$k[ $j ] = $k[ $j + 1 ];
$k[ $j + 1 ] = $temp;
}
}
}
}
$accept_langs = array_combine( $k, $v );
}
}
$accept_langs = wp_list_filter( $accept_langs, array( '0' ), 'NOT' ); // Remove languages markes as unacceptable (q=0).
$languages = $this->model->get_languages_list( array( 'hide_empty' => true ) ); // Hides languages with no post
/**
* Filter the list of languages to use to match the browser preferences
*
* @since 1.9.3
*
* @param array $languages array of PLL_Language objects
*/
$languages = apply_filters( 'pll_languages_for_browser_preferences', $languages );
// Looks through sorted list and use first one that matches our language list
foreach ( array_keys( $accept_langs ) as $accept_lang ) {
// First loop to match the exact locale
foreach ( $languages as $language ) {
if ( 0 === strcasecmp( $accept_lang, $language->get_locale( 'display' ) ) ) {
return $language->slug;
}
}
// Second loop to match the language set
foreach ( $languages as $language ) {
if ( 0 === stripos( $accept_lang, $language->slug ) || 0 === stripos( $language->get_locale( 'display' ), $accept_lang ) ) {
return $language->slug;
}
}
}
return false;
}
/**
* Returns the language according to browser preference or the default language
*
* @since 0.1
*
* @return object browser preferred language or default language
*/
public function get_preferred_language() {
// check first if the user was already browsing this site
if ( isset( $_COOKIE[ PLL_COOKIE ] ) ) {
return $this->model->get_language( $_COOKIE[ PLL_COOKIE ] );
}
/**
* Filter the visitor's preferred language (normally set first by cookie
* if this is not the first visit, then by the browser preferences).
* If no preferred language has been found or set by this filter,
* Polylang fallbacks to the default language
*
* @since 1.0
*
* @param string $language preferred language code
*/
$slug = apply_filters( 'pll_preferred_language', $this->options['browser'] ? $this->get_preferred_browser_language() : false );
// return default if there is no preferences in the browser or preferences does not match our languages or it is requested not to use the browser preference
return ( $lang = $this->model->get_language( $slug ) ) ? $lang : $this->model->get_language( $this->options['default_lang'] );
}
/**
* Sets the language when home page is requested
*
* @since 1.2
*/
protected function home_language() {
// test referer in case PLL_COOKIE is set to false
// thanks to Ov3rfly http://wordpress.org/support/topic/enhance-feature-when-front-page-is-visited-set-language-according-to-browser
$language = $this->options['hide_default'] && ( ( isset( $_SERVER['HTTP_REFERER'] ) && in_array( parse_url( $_SERVER['HTTP_REFERER'], PHP_URL_HOST ), $this->links_model->get_hosts() ) ) || ! $this->options['browser'] ) ?
$this->model->get_language( $this->options['default_lang'] ) :
$this->get_preferred_language(); // sets the language according to browser preference or default language
$this->set_language( $language );
}
/**
* To call when the home page has been requested
* Make sure to call this after 'setup_theme' has been fired as we need $wp_query
* Performs a redirection to the home page in the current language if needed
*
* @since 0.9
*/
public function home_requested() {
// We are already on the right page
if ( $this->options['default_lang'] == $this->curlang->slug && $this->options['hide_default'] ) {
$this->set_curlang_in_query( $GLOBALS['wp_query'] );
/**
* Fires when the site root page is requested
*
* @since 1.8
*/
do_action( 'pll_home_requested' );
}
// Redirect to the home page in the right language
// Test to avoid crash if get_home_url returns something wrong
// FIXME why this happens? http://wordpress.org/support/topic/polylang-crashes-1
// Don't redirect if $_POST is not empty as it could break other plugins
// Don't forget the query string which may be added by plugins
elseif ( is_string( $redirect = $this->curlang->home_url ) && empty( $_POST ) ) {
$redirect = empty( $_SERVER['QUERY_STRING'] ) ? $redirect : $redirect . ( $this->links_model->using_permalinks ? '?' : '&' ) . $_SERVER['QUERY_STRING'];
/**
* When a visitor reaches the site home, Polylang redirects to the home page in the correct language.
* This filter allows plugins to modify the redirected url or prevent this redirection
* /!\ this filter may be fired *before* the theme is loaded
*
* @since 1.1.1
*
* @param string $redirect the url the visitor will be redirected to
*/
if ( $redirect = apply_filters( 'pll_redirect_home', $redirect ) ) {
$this->maybe_setcookie();
wp_redirect( $redirect, 302, POLYLANG );
exit;
}
}
}
/**
* Set the language when posting a comment
*
* @since 0.8.4
*
* @param int $post_id the post being commented
*/
public function pre_comment_on_post( $post_id ) {
$this->set_language( $this->model->post->get_language( $post_id ) );
}
/**
* Modifies some main query vars for home page and page for posts
* to enable one home page ( and one page for posts ) per language
*
* @since 1.2
*
* @param object $query instance of WP_Query
*/
public function parse_main_query( $query ) {
if ( ! $query->is_main_query() ) {
return;
}
/**
* This filter allows to set the language based on information contained in the main query
*
* @since 1.8
*
* @param bool|object $lang false or language object
* @param object $query WP_Query object
*/
if ( $lang = apply_filters( 'pll_set_language_from_query', false, $query ) ) {
$this->set_language( $lang );
$this->set_curlang_in_query( $query );
}
// sets is_home on translated home page when it displays posts
// is_home must be true on page 2, 3... too
// as well as when searching an empty string: http://wordpress.org/support/topic/plugin-polylang-polylang-breaks-search-in-spun-theme
elseif ( ( count( $query->query ) == 1 || ( is_paged() && count( $query->query ) == 2 ) || ( isset( $query->query['s'] ) && ! $query->query['s'] ) ) && $lang = get_query_var( 'lang' ) ) {
$lang = $this->model->get_language( $lang );
$this->set_language( $lang ); // sets the language now otherwise it will be too late to filter sticky posts !
$query->is_home = true;
$query->is_archive = $query->is_tax = false;
}
}
/**
* Sets the current language in the query
*
* @since 2.2
*
* @param object $query
*/
protected function set_curlang_in_query( &$query ) {
$pll_query = new PLL_Query( $query, $this->model );
$pll_query->set_language( $this->curlang );
}
}
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