smarty截取字符串（truncate）

事例：

php代码段：

$smarty = new Smarty;

$smarty->assign('string', 'Life honest valuable, love price is higher.');

$smarty->display('index.tpl');

index.tpl：

{$string}

{$string|truncate}

{$string|truncate:30}

{$string|truncate:30:""}

{$string|truncate:30:"---"}

{$string|truncate:30:"":true}

{$string|truncate:30:"...":true} 

{$string|truncate:30:"**********":false:true}

output:

    Life honest valuable, love price is higher.
    Life honest valuable, love price is higher.
    Life honest valuable, love...
    Life honest valuable, love
    Life honest valuable, love---
    Life honest valuable, love pri
    Life honest valuable, love ...
    Life hones**********is higher.