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php count function not working latest edition of php 4

Posted on 2004-09-28
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Last Modified: 2012-05-05
i thought eveything was ok but it seems that it doesnt want to allow me to add more then one item ?
everytime i do it overwrites the other item????
im trying to get this shopping cart working !!!





        function removeallitems(){
             unset($_SESSION['itemdata']);
             unset($_SESSION['totalamount']);

             if(isset($_SESSION['customerid'])){
                   unset($_SESSION['customerid']);
                   unset($_SESSION['customername']);

                    }

         }



         function additem(){


         if(isset($_SESSION['customerid'])){
                  //keep customer displaying in invoice

                  //Already Set please dont do anything !

                    }else{
                  //set the customer to a session !!
                   $_SESSION['customerid'] = $_REQUEST['customerid'];
                   $_SESSION['customername'] = $_REQUEST['customername'];

                   }

          $itemdata = array();

          $itemdata['qty']  = $_REQUEST['qty'];
          $itemdata['interchangenumber']  = $_REQUEST['interchangenumber'];
          $itemdata['interchangeid']  = $_REQUEST['interchangeid'];
          $itemdata['description']  = $_REQUEST['description'];
          $itemdata['rate']  = $_REQUEST['rate'];
          $itemdata['amount']  = $_REQUEST['amount'];

            if(!isset($_SESSION['itemdata']))
            $_SESSION['itemdata'] = array();

        if(!is_array($_SESSION['itemdata']))
        $_SESSION['itemdata'] = array();



        $_SESSION['itemdata'][] = $itemdata;

        $tmp = count($_SESSION['itemdata']['totalitems']);

         if(count($_SESSION['itemdata']['totalitems']) >= 0){
          $_SESSION['itemdata']['totalitems'] = ++$tmp;

         }else{
          $_SESSION['itemdata']['totalitems']=0;

         }




         }


         function removeitem($removeid){


            for($a=0; $a <= $_SESSION['itemdata']['totalitems']; $a++){

                     if($removeid == $a){
                     unset($_SESSION['itemdata'][$a]);
                     }
            }



         }





         function showallitems(){


                        for($a=0; $a <= $_SESSION['itemdata']['totalitems']; $a++){

                          if(isset($_SESSION['itemdata'][$a])){

                           $qty = $_SESSION['itemdata'][$a]['qty'];
                           $interchangeid = $_SESSION['itemdata'][$a]['interchangeid'];
                           $interchangenumber = $_SESSION['itemdata'][$a]['interchangenumber'];
                           $description = $_SESSION['itemdata'][$a]['description'];
                           $rate = $_SESSION['itemdata'][$a]['rate'];
                           $amount = $_SESSION['itemdata'][$a]['amount'];

                           $totalamount = $amount + $totalamount;
                           $_SESSION['totalamount'] = $totalamount;



echo '
<table width="73%" border="1" cellspacing="0" cellpadding="0" bordercolor="#000066">
  <tr bgcolor="#99CCFF" bordercolor="#000066">
    <td width="10%" align="center" valign="center" true styleid="StyleQty" bgcolor="#990000" bordercolor="#FFFFFF"><font color="#FFFFFF">&nbsp;</font></td>
    <td width="10%" align="center" valign="center" true styleid="StyleQty"><font face="Verdana" size="-1" color="#000000">Quantity</font></td>
      <td width="10%" align="center" valign="center" true styleid="StyleQty">PartID</td>
    <td width="14%" align="center" valign="center" true styleid="StyleQty">Interchange
      # </td>
    <td width="37%" align="center" valign="center" true styleid="StyleItemDesc">
      <font face="Verdana" size="-1" color="#000000">Description</font> </td>
    <td width="8%" align="center" valign="center" true styleid="StyleRate"> <font face="Verdana" size="-1" color="#000000">Rate</font>
    </td>
    <td width="6%" align="center" valign="center" true styleid="StyleItemAmount">
      <font face="Verdana" size="-1" color="#000000">Amount</font> </td>
    <td width="15%" align="center" valign="center" true styleid="StyleTaxFlag">
      <font face="Verdana" size="-1" color="#000000">Tax&nbsp;</font> </td>
  </tr>
  <tr bgcolor="#99CCFF" bordercolor="#000066">
    <td width="10%" align="center" valign="center" true styleid="StyleQty" bgcolor="#990000" bordercolor="#FFFFFF" height="13">&nbsp;
    </td>
    <td width="10%" align="center" valign="center" true styleid="StyleQty" height="13">
      <input type="text" name="qty.'.$a.'" size="4" maxlength="3" value="'.$qty.'" readonly>
    </td>
    <td width="10%" align="center" valign="center" true styleid="StyleQty" height="13">
        <input type="text" name="interchangeid.'.$a.'" value="'.$interchangeid.'" size="9" readonly>
      <br>
      </td>
    <td width="14%" align="center" valign="center" true styleid="StyleQty" height="13"><font face="Verdana" size="-1" color="#000000">
      <input type="text" name="interchangenumber'.$a.'" value="'.$interchangenumber.'" size="13" readonly>
      </font></td>
    <td width="37%" align="center" valign="center" true styleid="StyleItemDesc" height="13"><font face="Verdana" size="-1" color="#000000">
      <input type="text" name="description'.$a.'" size="45" value="'.$description.'" readonly>
      </font></td>
    <td width="8%" align="center" valign="center" true styleid="StyleRate" height="13"><font face="Verdana" size="-1" color="#000000">
      <input type="text" name="rate'.$a.'" size="8"  value="'.$rate.'" readonly>
      </font></td>
    <td width="6%" align="center" valign="center" true styleid="StyleItemAmount" height="13"><font face="Verdana" size="-1" color="#000000">
      <input type="text" name="amount'.$a.'" size="7"  value="'.$amount.'" readonly>
      </font></td>
    <td width="15%" align="center" valign="center" true styleid="StyleTaxFlag" height="13">NT</td>
  </tr>
</table>
<table width="73%" border="1" cellspacing="0" cellpadding="0" bordercolor="#000066">
  <tr>
    <td bgcolor="#990000" width="29%">
      <div align="center"><font color="#FFFFFF"></font></div>
    </td>
    <td bgcolor="#990000" width="38%">
      <div align="center"><font color="#FFFFFF"> </font></div>
    </td>
    <td bgcolor="#990000" width="33%">
      <div align="center"><font color="#FFFFFF">Remove Item</font></div>
    </td>
  </tr>
  <tr>
    <td bgcolor="#990000" width="29%">
    <div align="center"><font color="#FFFFFF">  </font></div>
    </td>
    <td bgcolor="#990000" width="38%">
    <div align="center"><font color="#FFFFFF">  </font></div>
     </td>
    <td bgcolor="#89E1FD" width="33%">
    <!--form name="removeitem" action="invoiceadd.php" method="post"-->
     <!--input type="hidden" name="removeitem" value="true"-->
    <!--input type="hidden" name="removeid" value='.$a.'-->
   <a href="?removeid='.$a.'">REMOVE ITEM</a>

      <!--input type="submit" name="removebutton" value="Remove Item"-->
    </td>
  </tr>
</table>
 <!--/form-->
';



                        }


         }



         }


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Question by:aot2002
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2 Comments
 
LVL 6

Accepted Solution

by:
peyox earned 1500 total points
ID: 12176449
count($_SESSION['itemdata']['totalitems']) will always return 1, because you are trying to count elements in non-array variable.

BTW, to check how many items you have, you dont need to use count. $_SESSION['itemdata']['totalitems'] keeps that information.

for($a=0; $a <= $_SESSION['itemdata']['totalitems']; $a++) <--- if you have 5 items, this loop will go through 0...5 (6 iterations).
0
 
LVL 1

Author Comment

by:aot2002
ID: 12176552
But doesnt that Zero seem to throw things off should i be setting it to one on the first item ?


>>for($a=0; $a <= $_SESSION['itemdata']['totalitems']; $a++) <--- if you have 5 items, this loop will go through 0...5 (6 iterations).

ok so take out that = then GOT IT...

>>count($_SESSION['itemdata']['totalitems']) will always return 1, because you are trying to count elements in non-array variable.

Right but when i first setup an item should i check for isset on itemdata totalitems then if it is set it as one

if(isset($_SESSION['itemdata']['totalitems'])){

    $_SESSION['itemdata']['totalitems']=$_SESSION['itemdata']['totalitems']++; //increase it    

     }else{

    $_SESSION['itemdata']['totalitems']=1;

}


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