Encap the session into a simple shopping car
************************* / Class Tcart {var $ sortcount; // Variety variety var $ TOTALCOST; / / Total value var worth VAR $ ID // // Id (array) VAR $ name; // Name of each type of product (array) VAR $ price; // Price of // Var $ count; / / The number of items per class (Array) VAR $ cost; // Value of each type of item (array) // ****** Constructor function tcart () {$ this-> sortcount = 0; session_start (); // Initialize a session session_register ('sID'); session_register ('sname'); session_register ('sprice'); session_register ('scount'); $ this-> update (); $ this-> Calculate ();} // **** **** Private, according to Session's Value update Class Function Update () {Global $ SID, $ SNAME, $ SPRICE, $ SCOUNT; if (! Isset ($ sID) or! Isset ($ sname) OR! ISSET ($ SPRICE)) RETURN; $ this-> id = $ sID; $ this-> name = $ sname; $ this-> price = $ sprice; $ this-> count = $ scount; $ this-> sortcount = Count ($ SID);} // ******** Private, calculate the value of each type of product according to the new data Function Calculate () {for ($ I = 0; $ i < $ this-> sortcount; $ i ) {$ this-> cost [$ i] = $ this-> price [$ I ]-> count [$ I]; $ this-> totalcost = $ this-> cost [$ I];}} // ******** ***** The following is the interface function // *** plus a product // Decision whether there is a blue existing, if there is, add count, otherwise add a new product // first is the value of session, then Call Update () and Calculate () to update member variables Function Addone ($ ID, $ NA, $ PR) {Global $ SID, $ SNAME, $ SPRICE, $ Scount; $ K = Count ($ SID); for i = 0; $ i <$ k; $ i ) {// first find this product if ($ SID [$ I] == $ ID) {$ SCOUNT [$ I] ; BREAK }} IF ($ i> =
$ K) {// No added a new product species $ sID [] = ID; $ sname [] = $ na; $ sprice [] = $ prount [] = 1;} $ this-> Update (); // Update member data $ this-> Calculate ();} // removes a commodity Function Removeone ($ ID) {Global $ SID, $ SNAME, $ SPRICE, $ Scount; $ k = Count ($ SID); For ($ I = 0; $ I <$ 1) {IF ($ SID [$ I] == $ ID) {$ SCOUNT [$ I] -; Break;}} $ this-> Update (); $ this-> Calculate ();} // Change the number of goods in Function Modifycount ($ I, $ ncount) {Global $ Scount; $ SCOUNT [$ I] = $ ncount; $ this -> Update (); $ this-> Calculate ();} // Empty a commodity Function Emptyone ($ I) {Global $ Scount; $ SCOUNT [$ I] = 0; $ this-> Update (); $ This-> Calculate ();} / ***************************************************************************************** The function, so this emptying function is not perfect, but the number of each item is 0. If it is under Linux, you can use session_destroy () directly.
