Autosend a form using php code

I need to automatically log into a webpage but I need to use PHP to do this. I can do this in Javascript but doing so will let people see my username/password :

function log_in(){
var f = document.forms[0];
f.action = “http://www.mysite.com/log_in.asp“;
f.target = “form_target”;
f.li_mn.value = myloginname;
f.li_pwd.value = “password”;
f.submit();
setTimeout(“myfunc();”,2500);
}

How do I do the same thing but using PHP?

Thanks,

Also in #PHP _↴