APO-Epsilon/apo-website

<?php
if(isset($_SESSION['sessionID'])){
    if($_SESSION['sessionexec'] == 1){
        $exec_authorized = False;
        if($exec_page){
            include('../mysql_access.php');
            $sql = "SELECT * FROM exec_permissions WHERE position = \"{$_SESSION['sessionposition']}\" AND page = \"{$_SERVER['PHP_SELF']}\";";
            $result = $db->query($sql);
            if(mysqli_num_rows($result) != 0){
                $exec_authorized = True;
            }
        }
        if($exec_authorized){
            show_exec();
        } elseif($active_page){
            show_active();
        } elseif($public_page){
            show_public();
        } elseif($exec_page){
            show_insuff_permissions();
        } else{
            show_error();
        }
    } else{
        if($active_page){
            show_active();
        } elseif($public_page){
            show_public();
        } elseif($exec_page){
            show_insuff_permissions();
        } else{
            show_error();
        }
    }
} else{
    if($public_page){
        show_public();
    } elseif($exec_page || $active_page){
        show_login();
    } else{
        show_error();
    }
}

function show_error() {
    echo "<div class=\"small-12 columns\">";
    echo "<h2>Oops</h2>";
    echo "<p>There's been an error. This page doesn't have any content.</p>";
    echo "</div>";
}

function show_insuff_permissions() {
    echo "<div class=\"small-12 columns\">";
    echo "<h2>Sorry</h2>";
    echo "<p>Only certain members of exec can view this page.</p>";
    echo "</div>";
}

function show_login() {
    require_once('login_form.php');
}

?>