title: Codeigniter- Fatal error: Call to undefined function lang()
body: <p>I don't know what error is it. I run on local and it is working fine, but when I try to run on the live server it gave me this error.</p>
  <h2>Fatal error:</h2>
  <blockquote>
  <p>Call to undefined function lang() in /var/www/html/my_system/application/controllers/usermanagement/usermanagement_main.php on line 672</p>
  </blockquote>
  <pre><code>$this-&gt;load-&gt;model('user/user','user');
  $this-&gt;load-&gt;model('tablecode/code_academic_qualifications');
  $this-&gt;load-&gt;model('tablecode/code_certifications');
  
  //Initialize content
  //$content['pagetitle'] = lang('eqb_title_userregistration');
  $content['userid'] = $userid;
  $content['pagefunction'] = lang('eqb_title_edituserprofile'); //&lt;-- line 672
  $content['nav'] = lang('eqb_title_userregistration');
  $content['updating_user'] = TRUE;
  $content['display_form_as'] = 'editing';
  
  $tabletypearray = array('code_city','code_country','code_disability','code_gender','code_marital_status','code_postcode','code_race','code_religion','code_state');
  $content['basicfields'] = $this-&gt;user-&gt;get_all_basic_form_data($tabletypearray);
  
  $content['current_acl_user'] = $this-&gt;ezrbac-&gt;getCurrentUser();
  
  $content['user_profile_information'] = $this-&gt;user-&gt;get_complete_user_profile_information_byid($userid);
  
  $acad_data = $this-&gt;user-&gt;get_user_academic_profile($userid);
  </code></pre>