Set cookies in a php cgi enviroment without using php api

#!/usr/bin/php
function set_cookie($cookiename,$cookievalue,$cookietime){
   echo 'set-cookie: '.$cookiename.'="'.$cookievalue.'"; max-age="'.$cookietime.'";'."n";
}

set_cookie("foo","bar",60)

echo "Content-Type: text/htmlnn";
echo "<html>n";
echo "<head>n";
echo "<title>whatever</title>n";
echo "</head>n";
echo "<body>n";

function set_cookie($cookiename){
   echo 'set-cookie: '.$cookiename.'="0"; max-age="0";'."n";
}