PHP - Mysqli - 错误更新购物车 [英] PHP - Mysqli - Error update cart shopping
问题描述
i.stack.imgur.com/tBWVO.pngrel =nofollow>如图所示
问题是我必须刷新页面才能更新添加的产品。
此功能将产品的商品添加到购物车中。
-------------------
（3） - >产品|
-------------------
数量：3 |
-------------------
<？php
if（isset（$ _ SESSION [QuantityTotal] ））
echo $ _SESSION [QuantityTotal];
else {
echo0;
}
？>
此功能显示加入购物车的产品的总成本
-------------------------------
（3） - >产品 - > $ 300.00 |
-------------------------------
总计：$ 300.00 |
-------------------------------
<？php
if（isset（$ _ SESSION [totalcoste]））
echo $ _SESSION [totalcoste];
else {
echoCart empty;
}
？>
这些功能将显示在所有页面上以显示访问者。
-------------------------------
（3） - >产品 - > $ 300.00 |
-------------------------------
数量：3合计：$ 300.00 |
-------------------------------
$ b $ p
$ p $<？php
if（isset（$ _GET ['id']））
$ id = $ _GET ['id'];
else
$ id = 1;
if（isset（$ _ GET ['action']））
$ action = $ _GET ['action'];
else
$ action =empty;
switch（$ action）{
caseadd：
if（isset（$ _ SESSION ['cart'] [$ id]））
$ _SESSION ['cart' ] [$ ID] ++;
else
$ _SESSION ['cart'] [$ id] = 1;
休息;
caseremove：
if（isset（$ _ SESSION ['cart'] [$ id]））
{
$ _SESSION ['cart'] [$ id] - ;
if（$ _ SESSION ['cart'] [$ id] == 0）
unset（$ _ SESSION ['cart'] [$ id]）;
}
break;
caseremoveProd：
if（isset（$ _ SESSION ['cart'] [$ id]））{
unset（$ _ SESSION ['cart'] [$ id]）;
}
break;
casemostrar：
if（isset（$ _ SESSION ['cart'] [$ id]））{
continue;
}
break;
caseempty：
unset（$ _ SESSION ['cart']）;
休息;
}
if（isset（$ _ SESSION ['cart']））{
echo'< table id =table-card>';
$ totalcoste = 0;
$ xTotal = 0;
echo'< tr>
< td colspan =2id =td-card>名称产品< / td>
< td id =td-card-precio>价格< / td>
< td id =td-card-cant>数量< / td>
< td colspan =3id =td-card-total>小计< / td>
< / tr>';
echo'< tr>
< td colspan =7>< / td>
< / tr>';
foreach（$ _ SESSION ['cart'] as $ id => $ x）{
$ sql = mysqli_query（$ con，SELECT * FROM products WHERE id = $ id ）;
$ mifila = mysqli_fetch_array（$ sql）;
$ id = $ mifila ['id'];
$ img = $ mifila ['img'];
$ price = $ mifila ['price'];
$ product = $ mifila ['name'];
$ product = substr（$ product，0,40）;
$ price = $ mifila ['price'];
$ coste = $ price * $ x;
$ totalcoste = $ totalcoste + $ coste;
$ xTotal = $ xTotal + $ x;
echo'< tr>
< td id =td-card-img>< img src =products /..$ img。'width =70height =120/>< / td> ;
< td id =td-card-name>'。 $ product。'< / td>
< td id =td-card-store> $'。$ price。'< / td>
< td colspan =2id =td-card-border>
< table id =table-card-edition>
< tr>< td>& nbsp;< / td>
< td>'。$ x。'< / td>
< td>';
echo< form action ='cart.php？id =。 $ id。& action = add'method ='post'>
< input class ='img'type ='image'src ='img / add.png'title ='Update'/> ;
< / form>
;
echo'< / td>< td>'; echo
< form action ='cart.php？id =。 $ id。& action = remove'method ='post'>
< input class ='img'type ='image'src ='img / remove.png'title ='subtract'/> ;
< / form>
;
echo'< / td>< td>';
echo< form action ='cart.php？id =。 $ id。& action = removeProd'method ='post'>
< input class ='img'type ='image'src ='img / delete.gif'title ='删除'/> ;
< / form>
;
echo'< / td>< / tr>< / table> < / TD>
< td id =td-card-subtotal> $'。$ coste。'< / td>
< td>& nbsp;< / td>
< / tr>';
}
echo'< tr>< td colspan =7>< / td>< / tr>
< tr>
< td colspan =5id =td-card-total-pay>总计< / td>
< td id =td-card-subtotal-pay> $'。$ totalcoste。'< / td>
< td>& nbsp;< / td>
< / tr>
< tr>
< td colspan =7>
< a href =shopping.php>< input id =buttontype =buttonvalue =Checkout/>< / a>< / td>
< / tr>
< / table>';
}
else
echo'篮子是空的';
$ _SESSION [totalcoste] = $ totalcoste;
$ _SESSION [quantityTotal] = $ xTotal;
echo'< br />< div class =volver> Volver a la< a href =product.php> products< / a>< / div>';
？>
购买产品的按钮就是这个功能
< a href ='cart.php？id = $ id& action = add'><按钮>添加到购物车< /按钮>< / a>
它等于这个函数
cart.php？id = 3& action = add
帮助我修改代码，使其工作无需刷新页面
谢谢。
输入此代码修复问题朋友
if（isset（$ _ SESSION ['cart' ]））
if（isset（$ _ SESSION ['cart']））{
echo'< table id =table-card>';
$ totalcoste = 0;
$ xTotal = 0;
问候
Help please.
Error update cart shopping.
The problem is that I have to refresh the page to update added products.
This function has the items of products added to cart.
-------------------
(3) --> Product |
-------------------
Quantity: 3 |
-------------------
<?php
if(isset($_SESSION["QuantityTotal"]))
echo $_SESSION["QuantityTotal"];
else{
echo "0";
}
?>
This function shows the total cost of the products added to cart
-------------------------------
(3) --> Product --> $300.00 |
-------------------------------
Total: $300.00 |
-------------------------------
<?php
if(isset($_SESSION["totalcoste"]))
echo $_SESSION["totalcoste"];
else{
echo "Cart empty";
}
?>
These functions will be displayed on all pages to display the visitors.
-------------------------------
(3) --> Product --> $300.00 |
-------------------------------
Quantity: 3 Total: $300.00 |
-------------------------------
This is code complete cart shopping.
<?php
if (isset($_GET['id']))
$id = $_GET['id'];
else
$id = 1;
if (isset($_GET['action']))
$action = $_GET['action'];
else
$action = "empty";
switch($action){
case "add":
if(isset($_SESSION['cart'][$id]))
$_SESSION['cart'][$id]++;
else
$_SESSION['cart'][$id]=1;
break;
case "remove":
if(isset($_SESSION['cart'][$id]))
{
$_SESSION['cart'][$id]--;
if($_SESSION['cart'][$id]==0)
unset($_SESSION['cart'][$id]);
}
break;
case "removeProd":
if(isset($_SESSION['cart'][$id])){
unset($_SESSION['cart'][$id]);
}
break;
case "mostrar":
if(isset($_SESSION['cart'][$id])){
continue;
}
break;
case "empty":
unset($_SESSION['cart']);
break;
}
if(isset($_SESSION['cart'])){
echo'<table id="table-card">';
$totalcoste = 0;
$xTotal = 0;
echo'<tr>
<td colspan="2" id="td-card">Name product</td>
<td id="td-card-precio">Price</td>
<td id="td-card-cant">Quantity</td>
<td colspan="3" id="td-card-total">Subtotal</td>
</tr>';
echo '<tr>
<td colspan="7"></td>
</tr>';
foreach($_SESSION['cart'] as $id => $x){
$sql = mysqli_query($con,"SELECT * FROM products WHERE id=$id");
$mifila = mysqli_fetch_array ($sql);
$id = $mifila['id'];
$img = $mifila['img'];
$price = $mifila['price'];
$product = $mifila['name'];
$product = substr($product,0,40);
$price = $mifila['price'];
$coste = $price * $x;
$totalcoste = $totalcoste + $coste;
$xTotal = $xTotal + $x;
echo '<tr>
<td id="td-card-img"><img src="products/'.$img.'" width="70" height="120" /></td>
<td id="td-card-name">'. $product .'</td>
<td id="td-card-store">$ '.$price.'</td>
<td colspan="2" id="td-card-border">
<table id="table-card-edition">
<tr><td> </td>
<td>'.$x.'</td>
<td>';
echo"<form action='cart.php?id=". $id ."&action=add' method='post'>
<input class='img' type='image' src='img/add.png' title='Update'/>
</form>
";
echo'</td><td>';echo"
<form action='cart.php?id=". $id ."&action=remove' method='post'>
<input class='img' type='image' src='img/remove.png' title='subtract'/>
</form>
";
echo'</td><td>';
echo"<form action='cart.php?id=". $id ."&action=removeProd' method='post'>
<input class='img' type='image' src='img/delete.gif' title='Delete'/>
</form>
";
echo'</td></tr></table> </td>
<td id="td-card-subtotal">$ '.$coste .'</td>
<td> </td>
</tr>';
}
echo'<tr><td colspan="7"></td></tr>
<tr>
<td colspan="5" id="td-card-total-pay">Total</td>
<td id="td-card-subtotal-pay">$ '.$totalcoste.'</td>
<td> </td>
</tr>
<tr>
<td colspan="7">
<a href="shopping.php"><input id="button" type="button" value="Checkout" /></a></td>
</tr>
</table>';
}
else
echo 'The basket is empty';
$_SESSION["totalcoste"] = $totalcoste;
$_SESSION["quantityTotal"] = $xTotal;
echo '<br/><div class="volver">Volver a la <a href="product.php">products</a></div>';
?>
The button of buy product is this function
<a href='cart.php?id=$id&action=add'><button>Add to cart</button></a>
which it is equal to this function
cart.php?id=3&action=add
Help me to modify the code, to make it work without having to refresh the page
Thank you.
Enter this code to fix the problem friend
if(isset($_SESSION['cart']))
if(isset($_SESSION['cart'])){
echo'<table id="table-card">';
$totalcoste = 0;
$xTotal = 0;
Greetings
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