How to attach document in TaskNote ?

How to attach document in TaskNote ?

Hello ,
I want to attach document in tasknote as well as want to get attached document with tasknote in zoho projects via API with PHP .
I am using this

For add TaskNote
$url ="https://projects.zoho.com/portal/".PORTAL."/api/private/json/task/addnotes?apikey=".API_KEY."&ticket=".$this->ticket;

For get TaskNote
$url ="https://projects.zoho.com/portal/".PORTAL."/api/private/json/task/getnotes?apikey=".API_KEY."&ticket=".$this->ticket;



Please help me.

Thanks !