Phpfox插件3.7.7

Whats is the difference between

(($sPlugin = Phpfox_Plugin::get('blog.service_process__start')) ? eval($sPlugin) : false); 

and

{plugin call='blog.template_controller_add_hidden_form'}

(($sPlugin = Phpfox_Plugin::get('blog.service_process__start')) ? eval($sPlugin) : false); 

this syntax  used in class files (controller,block,service) 

and


{plugin call='blog.template_controller_add_hidden_form'}

this syntax used in template file (controller,block)