07-session implements simple Shopping Cart 2 (obtain the sessionid method Sid)

Myhall. php

<? Phpif (isset ($ _ Get ['phpsessid ']) {session_id ($ _ Get ['phpsessid']);} // when the session is started, it determines whether sessionid is set. // if it is set, no new one is generated. If it is not set, no new one is generated. Session_start (); // echo "
Showprocess. php
<? PHP // receives the user's purchase request and saves the book to the session. $ Bookid = $ _ Get ['bookid']; $ bookname = $ _ Get ['bookname']; // prevent cookie disabling, therefore, you cannot create sessionif (isset ($ _ Get ['phpsessid ']) {session_id ($ _ Get ['phpsessid']);} // save it to the session // initialize the session, and a session file session_start () will be created in the default directory; $ _ session [$ bookid] = $ bookname; echo "<br/> the product is successfully purchased! "; Echo" <br/> <a href = 'myhall. php? ". Sid." '> return to the shopping hall to continue purchasing </a> ";?>
Showcart. php
<? PHP echo "