Comment 0 for bug 1571534

16.04 after php5->php7.0 I have blank page in frontend and php fatal error in apache2/error.log:

PHP Fatal error: Uncaught Error: Call to undefined function mb_strlen() in /usr/share/zabbix/include/classes/user/CProfile.php:330\nStack trace:\n#0 /usr/share/zabbix/include/classes/user/CProfile.php(214): CProfile::checkValueType('index.php', 3)\n#1 /usr/share/zabbix/include/menu.inc.php(351): CProfile::update('web.menu.login....', 'index.php', 3)\n#2 /usr/share/zabbix/include/page_header.php(123): zbx_construct_menu(Array, Array, Array)\n#3 /usr/share/zabbix/include/views/general.login.php(30): require_once('/usr/share/zabb...')\n#4 /usr/share/zabbix/include/classes/core/CView.php(111): include('/usr/share/zabb...')\n#5 /usr/share/zabbix/index.php(117): CView->render()\n#6 {main}\n thrown in /usr/share/zabbix/include/classes/user/CProfile.php on line 330