[英]Retrieving Post value of <select> tag for updating shopping cart quantity?
I'm trying to create a simple shopping cart. 我正在尝试创建一个简单的购物车。 That allows users to select a quantity from a drop-down menu using
<select>
tag. 这允许用户使用
<select>
标签从下拉菜单中选择数量。 By default it shows "1" unless a quantity is selected , see below: 默认情况下,除非选择了数量,否则显示“1”,如下所示:
Problem: I am getting a "<" symbol once I've click update and updated the cart. 问题:点击更新并更新购物车后,我收到一个“<”符号。
I cannot figure out why I am getting the "<" symbol, my <select>
tag and value
attributes look correct?! 我无法弄清楚为什么我得到“<”符号,我的
<select>
标签和value
属性看起来正确?!
Here is my code: 这是我的代码:
// If the update button is clicked and the if an option has been selected for the <select> tag.
if(isset($_POST['updated_value'])) {
if(isset($_POST['selectDropDown'])) {
$updatedValue = $_POST['selectDropDown'];
}
} else {
$updatedValue = '1';
}
?>
<table>
<tr>
<th>Description </th>
<th>Quantity</th>
</tr>
</table>
<?php while($cart = mysqli_fetch_assoc($result)) { ?>
<form action="cart.php" method="POST">
<table>
<tr>
<td>
<?php echo $cart["prod_desc"]; ?>
</td>
<td>
<select name= "selectDropDown" >
<option value=< <?php echo $updatedValue; ?> > <?php echo $updatedValue; ?> </option>
<option value=<2> 2 </option>
<option value=<3> 3 </option>
<option value=<4> 4 </option>
<option value=<5> 5 </option>
<option value=<6> 6 </option>
<option value=<7> 7 </option>
<option value=<8> 8 </option>
<option value=<9> 9 </option>
<option value=<10> 10 </option>
</select>
</td>
<td>
<input type="submit" name="updated_value" value="update"/>
</td>
</tr>
</table>
</form>
<?php
}
?>
Any ideas? 有任何想法吗? Please help!
请帮忙!
<option value=< <?php echo $updatedValue; ?> > <?php echo $updatedValue; ?> </option>
<option value=<2> 2 </option>
<option value=<3> 3 </option>
<option value=<4> 4 </option>
<option value=<5> 5 </option>
<option value=<6> 6 </option>
<option value=<7> 7 </option>
<option value=<8> 8 </option>
<option value=<9> 9 </option>
<option value=<10> 10 </option>
It's not correct, you should remove the "<" symbol in "value =", it's should look like this: 这不正确,您应该删除“value =”中的“<”符号,它应该如下所示:
<option value= <?php echo $updatedValue; ?> > <?php echo $updatedValue; ?> </option>
<option value=2> 2 </option>
<option value=3> 3 </option>
<option value=4> 4 </option>
<option value=5> 5 </option>
<option value=6> 6 </option>
<option value=7> 7 </option>
<option value=8> 8 </option>
<option value=9> 9 </option>
<option value=10> 10 </option>
Try this, 尝试这个,
// If the update button is clicked and the if an option has been selected for the <select> tag.
if(isset($_POST['updated_value'])) {
if(isset($_POST['selectDropDown'])) {
$updatedValue = $_POST['selectDropDown'];
}
} else {
$updatedValue = '1';
}
?>
<table>
<tr>
<th>Description </th>
<th>Quantity</th>
</tr>
</table>
<?php while($cart = mysqli_fetch_assoc($result)) { ?>
<form action="cart.php" method="POST">
<table>
<tr>
<td>
<?php echo $cart["prod_desc"]; ?>
</td>
<td>
<select name= "selectDropDown" >
<option value="<?php echo $updatedValue; ?>" > <?php echo $updatedValue; ?> </option>
<option value=2> 2 </option>
<option value=3> 3 </option>
<option value=4> 4 </option>
<option value=5> 5 </option>
<option value=6> 6 </option>
<option value=7> 7 </option>
<option value=8> 8 </option>
<option value=9> 9 </option>
<option value=10> 10 </option>
</select>
</td>
<td>
<input type="submit" name="updated_value" value="update"/>
</td>
</tr>
</table>
</form>
<?php
}
?>
Add for example <option value="<2"> 2 </option>
例如,添加
<option value="<2"> 2 </option>
value of option value should be in quotes... 期权价值应该在报价中......
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