[英]smarty template variable not clear
我正在尝试了解使用PHP开发Web应用程序, 这是本书
有一个文件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=$obj->mDepartments}
name=i
工作方式,初始化的方式以及如何从i开始循环,
其次,上面的文件正在使用文件function.load_presentation_object.php
<?php
// Plug-in functions inside plug-in files must be named: smarty_type_name
function smarty_function_load_presentation_object($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'], $obj);
}
?>
在上面的文件中,最后一行使用了参数$ params
$smarty->assign($params['assign'], $obj);
据我从文件department_list.tpl可以理解,将参数传递给function.load_presentation_object.php为
{load_presentation_object filename="departments_list" assign="obj"}
所以当跟随
function smarty_function_load_presentation_object($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?
{load_presentation_object filename="departments_list" assign="obj"}
转换为php将是:
smarty_function_load_presentation_object(
array(
'filename' => 'departments_list',
'assign' => 'obj'
),
$smarty
);
smarty模板中指定的每个参数都作为关联数组传递给第一个参数。 第二是当前最聪明的对象。
至于
{section name=i loop=$obj->mDepartments}
这是简单for
循环:
for ($i=0; $i < count($obj->mDepartments); $i++) {
$current = $obj->mDepartments[$i];
}
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