PHP在CodeIgniter3中包含哪些等價物？

Question

請向我解釋如何做到這一點：

<?php 
    if(!isset($_GET['s'])) { 
    $_GET['s'] = ""; } 
    if ($_GET['s'] == "") { include("Templates/Tutorial/1.tpl"); } 
    if ($_GET['s'] == "1") { include("Templates/Tutorial/1.tpl"); } 
    if ($_GET['s'] == "2") { include("Templates/Tutorial/2.tpl"); } 
    if ($_GET['s'] == "3") { include("Templates/Tutorial/3.tpl"); } 
    if ($_GET['s'] == "4") { include("Templates/Tutorial/4.tpl"); } 
    if ($_GET['s'] == "5") { include("Templates/Tutorial/5.tpl"); } 
?> 

非常感謝您！

Answer 1

我認爲這也將工作

<?php 
    $inc = 1; 
    if(isset($_GET['s']) && $_GET['s'] != ""): 
     $inc = (int)$_GET['s']; 
    endif; 

    include("Templates/Tutorial/$inc.tpl"); 
?>