php - Codeigniter keep selected language -

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i have codeigniter application default language english , have tow anchor switch language english.

the problem when switch language english eg:arabic same page changing when go page english again.

my_lang.php

<?php (defined('basepath')) or exit('no direct script access allowed');  // originaly codeigniter i18n library jérome jaglale  // http://maestric.com/en/doc/php/codeigniter_i18n  //modified tobin thomas    class my_lang extends ci_lang {      /**************************************************  configuration  ***************************************************/    // add languages here  private $languages = array(  'en' => 'english',  'ar' => 'arabic'  );    // special uris (not localized)      private $special = array (  'admin',  'assets',  'editor'  );    // redirect if no language in uri  private $uri;  private $default_uri;  private $lang_code;    /**************************************************/      function my_lang()  {      parent::__construct();        global $cfg;      global $uri;      global $rtr;        $this->uri = $uri->uri_string();      $this->default_uri = $rtr->default_controller;        $uri_segment = $this->get_uri_lang($this->uri);      $this->lang_code = $uri_segment['lang'] ;        $url_ok = false;      if ((!empty($this->lang_code)) && (array_key_exists($this->lang_code, $this->languages)))      {          $language = $this->languages[$this->lang_code];          $cfg->set_item('language', $language);          $url_ok = true;      }        if ((!$url_ok) && (!$this->is_special($uri_segment['parts'][0]))) // special uri -> no redirect      {          // set default language          $cfg->set_item('language', $this->languages[$this->default_lang()]);            $uri = (!empty($this->uri)) ? $this->uri: $this->default_uri;          $uri = ($uri[0] != '/') ? '/'.$uri : $uri;          $new_url = $cfg->config['base_url'].$this->default_lang().$uri;            header("location: " . $new_url, true, 302);          exit;      }  }        // current language  // ex: return 'en' if language in ci config 'english'    function lang()  {      global $cfg;      $language = $cfg->item('language');        $lang = array_search($language, $this->languages);      if ($lang)      {          return $lang;      }        return null;    // should not happen  }      function is_special($lang_code)  {      if ((!empty($lang_code)) && (in_array($lang_code, $this->special)))          return true;      else      return false;  }      function switch_uri($lang)  {      if ((!empty($this->uri)) && (array_key_exists($lang, $this->languages)))      {            if ($uri_segment = $this->get_uri_lang($this->uri))          {              $uri_segment['parts'][0] = $lang;              $uri = implode('/',$uri_segment['parts']);          }          else          {              $uri = $lang.'/'.$this->uri;          }      }        return $uri;  }    //check if language exists  //when true returns array lang abbreviation + rest  function get_uri_lang($uri = '')  {      if (!empty($uri))      {          $uri = ($uri[0] == '/') ? substr($uri, 0): $uri;            $uri_expl = explode('/', $uri, 2);          $uri_segment['lang'] = null;          $uri_segment['parts'] = $uri_expl;            if (array_key_exists($uri_expl[0], $this->languages))          {              $uri_segment['lang'] = $uri_expl[0];          }          return $uri_segment;      }      else      return false;  }      // default language: first element of $this->languages  function default_lang()  {      $browser_lang = !empty($_server['http_accept_language']) ? strtok(strip_tags($_server['http_accept_language']), ',') : '';      $browser_lang = substr($browser_lang, 0,2);      return (!empty($browser_lang) && array_key_exists($browser_lang, $this->languages)) ? $browser_lang: 'en';  }      // add language segment $uri (if appropriate)      function localized($uri)  {      if (!empty($uri))      {          $uri_segment = $this->get_uri_lang($uri);          if (!$uri_segment['lang'])          {                if ((!$this->is_special($uri_segment['parts'][0])) && (!preg_match('/(.+)\.[a-za-z0-9]{2,4}$/', $uri)))              {                  $uri = $this->lang() . '/' . $uri;              }          }      }      return $uri;  }  }    // end my_lang class    /* end of file my_lang.php */  /* location: ./application/core/my_lang.php */

and view.php

<div class="lang-bar pull-left">  <a href="<?php echo site_url($this->lang->switch_uri('ar'));?>" class="btn btn-success">ar</a>  <a href="<?php echo site_url($this->lang->switch_uri('en'));?>" class="btn btn-success">en</a>  </div>

so how keep language until close page

i don't know how library works, maybe don't load session library keep language values accross pages. here's lib use: https://github.com/devtime-share/codeigniter-kitlang


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