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变量作用范围
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变量作用范围

你可以设置Smarty对象、通过createData()建立的对象、和createTemplate()建立的对象的作用范围。这些对象可以连接使用。模板内可以使用全部由对象的变量和它们链条上的父对象的变量。

默认模板通过 $smarty->display(...)或 $smarty->fetch(...)调用，可获取到Smarty对象范围的变量。

通过传递特定的数据或模板对象，你可以完全在模板内控制这些变量的可视范围。

Example 4.6. 变量范围的例子



// assign variable to Smarty object scope
$smarty->assign('foo','smarty');

// assign variables to data object scope
$data = $smarty->createData();
$data->assign('foo','data');
$data->assign('bar','bar-data');

// assign variables to other data object scope
$data2 = $smarty->createData($data);
$data2->assign('bar','bar-data2');

// assign variable to template object scope
$tpl = $smarty->createTemplate('index.tpl');
$tpl->assign('bar','bar-template');

// assign variable to template object scope with link to Smarty object
$tpl2 = $smarty->createTemplate('index.tpl',$smarty);
$tpl2->assign('bar','bar-template2');

// This display() does see $foo='smarty' from the $smarty object
$smarty->display('index.tpl');

// This display() does see $foo='data' and $bar='bar-data' from the data object $data
$smarty->display('index.tpl',$data);

// This display() does see $foo='data' from the data object $data 
// and $bar='bar-data2' from the data object $data2
$smarty->display('index.tpl',$data2);

// This display() does see $bar='bar-template' from the template object $tpl
$tpl->display();  // or $smarty->display($tpl);

// This display() does see $bar='bar-template2' from the template object $tpl2
// and $foo='smarty' form the Smarty object $foo
$tpl2->display();  // or $smarty->display($tpl2);

参见assign(), createData()和 createTemplate().

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