1. The PHP reserved {$smarty} variable can be used to access several enviroment and request variables.
   也就是说Smarty能直接访问get,post,cookies,server,env,session,request中设置的变量

2. 默认情况下php内置函数能在{if}{/if}中应用，或者作为Modifier

3. If you apply a modifier to an array variable instead of a single value variable, the modifier will be applied to every value
in that array. If you really want the modifier to work on an entire array as a value, you must prepend the modifier name with a @ symbol.

目前用不到.

1.滿常用到的,不過是比較偷懶時 作法才這樣用,

2.就不常用到,因為如果太多判斷還在樣版執行,那幹嘛用樣板?

3.這就沒用過了