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First write the landing page, the code is as follows:
<body>
To process the page code:
<?phpsession_start (); Include (".. /dbda.class.php "); $db = new Dbda (); $zhang = $_post[" Zhang "]; $pwd = $_post[" pwd "]; $sql =" Select Mi from Yonghu WHERE Zhang = ' {$zhang} ', $arr = $db->query ($sql), if (!empty ($zhang) &&!empty ($mi) && $mi = $arr) { $_session ["Zhang"] = $zhang; Header ("location:zym.php");} else{ echo "failed to log in";}? >Next comes the main page:
<! DOCTYPE html Public"-//w3c//dtd XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >PHPSession_Start(); ?> <table width= "50%" border= "1" cellpadding= "0" cellspacing= "0" > <tr> < ;td> code </td> <td> name </td> <td> Price </td> <TD&G T; Origin </td> <td> inventory </td> <td> Operations </td> </tr>
</table> </body>
Processing code: <? PHP require ". /dbda.class.php "; $db = new Dbda (); $sql = "SELECT * from fruit"; $arr = query ($sql) , $db foreach ($arr as $v) {echo "<tr> <td>{$v[0]}</td> <td>{$v[1]}</td> & lt;td>{$v[2]}</td> <td>{$v[3]}</td> <td>{$v[4]}</td> <td> <a href= ' gwc_chuli.php?ids={$v[0]} ' > Add to Cart </a></td> </tr> ';}?> Shopping Cart
if(Empty($_session["GWC"])) { //if it is the first time to add a shopping cart, create a two-dimensional array to store in the session $arr=Array( Array($ids, 1) ); $_session["GWC"] =$arr; } Else { $arr=$_session["GWC"]; $bs=false;//whether it appears foreach($arr as $v) { if($v[0]==$ids) { $bs=true; } } if($bs) { //2. If the item is present in the cart, add 1 to the quantity foreach($arr as $k=$v) { if($v[0] = =$ids) { $arr[$k][1]++;//Here we use a variable k to get the value and assignment, because just the value given to $v to represent the value of the array, in fact, the value of the array is not changed because of $v change two } } $_session["GWC"] =$arr; } Else { //1. If the product does not exist in the shopping cart, create a one-dimensional array and throw it into two dimensions. $attr=Array($ids, 1); $arr[] =$attr; $_session["GWC"] =$arr; } } Header("location:gwc_list.php");//back to the list of interfaces
View Shopping Cart
<! DOCTYPE html Public"-//w3c//dtd XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd" >PHPSession_Start(); $arr=$_session["GWC"]; require"DataBase.class.php"; $db=Newdatebase (); $sum= 0; foreach($arr as $k=$v) { $v[0]; $v[1]; $sql= "SELECT * from fruit where ids= ' {$v[0]} ' "; $af=$db, Query ($sql); Echo"<tr> <td>{$v[0]}</td> <td>{$af[0][1]}</td> <td>{$af[0][2]}</td> <td>{$v[1]}</td> <td><a href= ' gwc_del.php?sy={$k} ' > Delete </a></td> </tr>"; $sum=$sum+$v[1] *$af[0] [2]; } ? ></table><div><?PHP$gs=Count($arr);//There are several items in the shopping cartEcho"The shopping cart has a total of$gs} commodity, the total price of the product is: {$sum} meta "; ?> </div> </body>Delete items
<?PHPSession_Start();$sy=$_get["Sy"];//if the number of fruits is greater than 1, subtract 1//if the number of fruits equals 1 removed$arr=$_session["GWC"];if($arr[$sy][1] > 1) { //if the number of fruits is greater than 1, minus 1 $arr[$sy][1]--;} Else { unset($arr[$sy]); $arr=array_values($arr);}$_session["GWC"] =$arr;Header("location:gwc_chakan.php");PHP Write Shopping Cart
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