$php_handling
php处理变量

This tells Smarty how to handle PHP code embedded in the templates. There are four possible settings, default being SMARTY_PHP_PASSTHRU. Note that this does NOT affect php code within {php}{/php} tags in the template.
该变量告诉Smarty怎样处理嵌入到模版中的php代码.有四种可能的设置,默认为SMARTY_PHP_PASSTHRU.注意：改变量的设置不会影响模板里面{php}{/php}标记中的php代码.

• SMARTY_PHP_PASSTHRU - Smarty echos tags as-is.Smarty
  原样输出标记.

• SMARTY_PHP_QUOTE - Smarty quotes the tags as html entities.Smarty
  作为html实体引用标记

• SMARTY_PHP_REMOVE - Smarty removes the tags from the templates.Smarty
  从模板中移出标记.

• SMARTY_PHP_ALLOW - Smarty will execute the tags as PHP code.Smarty
  将作为php代码执行标记.

NOTE: Embedding PHP code into templates is highly discouraged. Use custom functions or modifiers instead.
极度不赞成将php代码嵌入到模板中.