#13 declaration missing

[Anonymous]

Undefined variable: chk in lams\functions\site\general_site_setup_form.php on line 51

Undefined variable: button_val in lams\functions\design\buttons.php on line 18

Undefined index: j in lams\modules\settings\leave_periods\index.php on line 33

Undefined index: period_id in lams\modules\settings\leave_periods\add_form.php on line 22

Undefined variable: year_period_from in lams\functions\periods\new_period_form.php on line 34

Undefined variable: month_period_from in lams\functions\periods\new_period_form.php on line 34

Undefined variable: year_period_to in lams\functions\periods\new_period_form.php on line 38

Undefined variable: month_period_to in lams\functions\periods\new_period_form.php on line 38

Undefined index: session_lifetime in lams\classes\db\session.php on line 12

Undefined variable: leave_categories in lams\modules\settings\index.php on line 9

Undefined index: cat in lams\modules\settings\leave_periods\index.php on line 14

Undefined variable: button_val in lams\functions\design\buttons.php on line 18

Undefined variable: additional_leave in lams\modules\settings\index.php on line 9

Undefined variable: leave_categories in lams\modules\settings\index.php on line 9

Undefined index: ticket_id in lams\modules\settings\approvers\index.php on line 5

Undefined variable: taskbar_msg in lams\functions\misc\error_msgs.php on line 25

Undefined variable: bg_col in lams\classes\calendar\calendar_mini.php on line 92