registerPlugin 来注册变量调节器

$var="this is a de1mo th2is ia de mo this i3s a demo";

$smarty->assign("var",$var);

function fontstyle($str,$fontsize="3",$fontcolor="green"){
return ‘<font color="‘.$fontcolor.‘" size="‘.$fontsize.‘">‘.$str.‘</font>‘;

}

$smarty->registerPlugin("modifier","fontstyle","fontstyle");

之后，就可以像变量调节器一样调用了

<{$var|fontstyle:3:"red"}> <br>

this is a de1mo th2is ia de mo this i3s a demo 字体3 ，为红色