如何在此購物車php中插入數量

Question

我已成功將商品添加到購物車。 但是，我無法添加數量。 我知道問題出在addtocart中，我無法將值從索引傳遞到下一頁。 我仍然是這個問題的初學者，所以我不知道如何解決此問題。 我已經嘗試過使用會話，但仍然無法正常工作

這是我在index.php中的代碼：

 <html> <head> <meta charset="UTF-8"> <title>Innisnotfree</title> </head> <body> <?php session_start(); include'header.php'; include'nav.php'; include "connection.php"; $sql = "SELECT * FROM products"; $res = mysqli_query($connection, $sql); ?> <div class="container"> <div class="row"> <?php while($r = mysqli_fetch_assoc($res)){ ?> <div class="col-sm-6 col-md-3"> <div class="thumbnail"> <img src="<?php echo $r['image'];?>" alt="<?php echo $r['title']?>"> <div class="caption"> <form name="form1" id="form1" method="POST" action="addtocart.php?id=<?php echo $r['id']?>"> <h3><?php echo $r['title']?></h3> <p> <?php echo $r['description']?></p> <p><?php echo $r['price']?></p> <p><input type="number" name="quantity" id="quantity" class="form-control"/></p> <p><input type="submit" name="add_to_cart" id="add_to_cart" style="margin-top:5px;" class="btn btn-success" value="Add to Cart"/></p> </form> </div> </div> </div> <?php } ?> </div> </div> <?php include('footer.php')?> </body> </html>

這是我的addtocart.php

 <?php session_start(); if(isset($_SESSION['cart']) & !empty($_SESSION['cart'])){ $items = $_SESSION['cart']; $cartitems = explode(",", $items); $items .= "," . $_GET['id']; if($_SERVER["REQUEST_METHOD"]=="POST"){ $quantity = $_POST["quantity"];} header('location: index.php?status=success'); }else{ $items = $_GET['id']; $_SESSION['cart'] = $items; if($_SERVER["REQUEST_METHOD"]=="POST"){ $_POST["quantity"] = $quantity ;} header('location: index.php?status=success'); } ?>

這是我的cart.php：

 <html> <head> <meta charset="UTF-8"> <title></title> </head> <body> <?php session_start(); require_once('connection.php'); include('header.php'); include('nav.php'); $items = $_SESSION['cart']; if($_SERVER["REQUEST_METHOD"]=="POST"){ $quantity = $_POST["quantity"]; } $cartitems = explode(",", $items); ?> <div class="container"> <div class="row"> <table class="table"> <tr> <th>S.NO</th> <th>Item Name</th> <th>Quantity</th> <th>Price </th> </tr> <?php $total = 0; $i =1; foreach ($cartitems as $key=>$id){ $sql = "SELECT * FROM products WHERE id = $id"; $res= mysqli_query($connection, $sql); if(empty($_SESSION['cart'])){ $r = 0; } else{ $r = mysqli_fetch_assoc($res); } ?> <tr> <td><?php echo $i; ?></td> <td><a href="delcart.php?remove=<?php echo $key; ?>">Remove</a><?php echo $r['title'];?></td> <td><?php if($_SERVER["REQUEST_METHOD"]=="POST"){echo $_POST["quantity"];};?></td> <td>$<?php echo $r['price'];?></td> </tr> <?php $total = $total + $r['price']; $i++; } ?> <tr> <td><strong>Total Price</strong></td> <td><strong>$<?php echo $total; ?></strong></td> <td><a href="#" class="btn btn-info">Checkout</a></td> </tr> </table> </div> </div> <?php include 'footer.php'; ?> </body> </html>

Answer 1

查看我的購物車類，您可以根據需要對其進行修改

class cart {
/**
 * add product to cart by id and quantity
 * @param type $pid product id
 * @param type $quantity 
 */
function add($pid,$quantity){

/*if cart dosen't exist initialize it and add the first product*/
    if(!isset($_SESSION['cart'])){
        $_SESSION['cart']=array();
        $_SESSION['cart'][0]['productid']=$pid;
        $_SESSION['cart'][0]['quantity']=$quantity;
        echo 'Product successfully added';
    }
/*else if cart exist check if product exist to change quantity else add new product*/
    else {
/*if exist change quantity*/
        if($this->isexist($pid,$quantity)){
            echo 'Quantity updated successfully';
        }
/*else add new product in cart*/
        else{
            $m=$_SESSION['cart'];
            $max=count($m);
            $_SESSION['cart'][$max]['productid']=$pid;
            $_SESSION['cart'][$max]['quantity']=$quantity;
            echo 'Product successfully added';
        }
    }

}

/**
 * check if product alredy exist in cart or not
 * @param type $pid product id
 * @param type $quantity
 * @return boolean if true the product is exist and the quantity change successfully
 */
function isexist($pid,$quantity) {
    $m=$_SESSION['cart'];
    $max=count($m);
    for($i=0;$i<$max;$i++){
        if($pid==$_SESSION['cart'][$i]['productid']){
            $_SESSION['cart'][$i]['quantity']=$quantity;
            return true;
        }
    }
    return false;

}

/**
 * delete product by product id
 * @param type $pid product id
 */
function delete($pid){
    $m=$_SESSION['cart'];
    $max=count($m);
    for($i=0;$i<$max;$i++){
        if($pid==$_SESSION['cart'][$i]['productid']){
        unset($_SESSION['cart'][$i]);
        $_SESSION['cart']=array_values($_SESSION['cart']);$_SESSION['cart'.'num']-=1;break;
        }
    }
}

/**
 * change quantity of exist product
 * @param type $pid product id
 * @param type $quantity
 */
function modify($pid,$quantity){
    $m=$_SESSION['cart'];
    $max=count($m);

    if($quantity>0){
        for($i=0;$i<$max;$i++){
            if($pid==$_SESSION['cart'][$i]['productid']){
                $_SESSION['cart'][$i]['quantity']=$quantity;break;
            }
        }
    }

    else {$this->delete($pid);}

}

/**
 * show all items in your cart
 */
function show_cart() {

    $max=count($_SESSION['cart']);
    for($i=0;$i<$max;$i++){
        echo 'id=>'.$_SESSION['cart'][$i]['productid'].
             'quantity=>'.$_SESSION['cart'][$i]['quantity'].'<br>';
    }
}

}

如何在此購物車php中插入數量

問題描述

1 個解決方案

解決方案1
0 2017-12-16 07:45:01

如何在此購物車php中插入數量

問題描述

1 個解決方案

解決方案1 0 2017-12-16 07:45:01

解決方案1
0 2017-12-16 07:45:01