smarty模板變量不清楚

Question

我正在嘗試了解使用PHP開發Web應用程序， 這是本書

有一個文件department_list.tpl

{* departments_list.tpl *}
{load_presentation_object filename="departments_list" assign="obj"}
{* Start departments list *}

<div class="box">
  <p class="box-title">Choose a Department</p>
  <ul>
      {* Loop through the list of departments *}
      {section name=i loop=$obj->mDepartments}
        {assign var=selected value=""}
        {* Verify if the department is selected to decide what CSS style to use *}
        {if ($obj->mSelectedDepartment == $obj->mDepartments[i].department_id)}
        {assign var=selected value="class=\"selected\""}
        {/if}
        <li>
        {* Generate a link for a new department in the list *}
        <a {$selected} href="{$obj->mDepartments[i].link_to_department}">
        {$obj->mDepartments[i].name}
        </a>
        </li>
      {/section}
  </ul>
 </div>
{* End departments list *}

我不明白上面文件中的哪一行是

      {section name=i loop=$obj->mDepartments}

name=i工作方式，初始化的方式以及如何從i開始循環，

其次，上面的文件正在使用文件function.load_presentation_object.php

<?php
// Plug-in functions inside plug-in files must be named: smarty_type_name
function smarty_function_load_presentation_object($params, $smarty)
        {
        require_once PRESENTATION_DIR . $params['filename'] . '.php';
        $className = str_replace(' ', '',ucfirst(str_replace('_', ' ',$params['filename'])));
        // Create presentation object
        $obj = new $className();
        if (method_exists($obj, 'init'))
        {
        $obj->init();
        }
        // Assign template variable
        $smarty->assign($params['assign'], $obj);
        }
?>

在上面的文件中，最后一行使用了參數$ params

        $smarty->assign($params['assign'], $obj);

據我從文件department_list.tpl可以理解，將參數傳遞給function.load_presentation_object.php為

{load_presentation_object filename="departments_list" assign="obj"}

所以當跟隨

function smarty_function_load_presentation_object($params, $smarty)

$ params = depratments_list和$ smarty = obj

那么如何$ smarty-> assign（$ params ['assign']，$ obj）;

工作上面的$ params ['assign']是什么？

Answer 1

{load_presentation_object filename="departments_list" assign="obj"}

轉換為php將是：

smarty_function_load_presentation_object(
    array(
        'filename' => 'departments_list', 
        'assign'   => 'obj'
    ), 
    $smarty
);

smarty模板中指定的每個參數都作為關聯數組傳遞給第一個參數。 第二是當前最聰明的對象。

至於

{section name=i loop=$obj->mDepartments}

這是簡單for循環：

for ($i=0; $i < count($obj->mDepartments); $i++) {
    $current = $obj->mDepartments[$i];
}