Question

我正在尝试让php通过执行foreach循环在下拉菜单中显示表格中的项目。它几乎可以工作，但是当我希望它们全部显示在同一个菜单中时，它会在单独的下拉菜单中显示这些项目。

<?php
$product_array = $db_handle->runQuery("SELECT * FROM tblproduct ORDER BY id ASC");
if (!empty($product_array)) { 
    foreach($product_array as $key=>$value){
?>
    <form method="post" action="index.php?action=add&code=<?php echo $product_array[$key]["code"]; ?>">
    <select id="Select_Product" name="Select_Product" class="select">

            <?
            echo '<option value=$product_array[$key]["code"]>'.$product_array[$key]["name"].'</option>'; 
        }
                }
            ?>
    </select>
            <div>Amount:<input type="text" name="quantity" value="1" size="2" /><input type="submit" value="Add to cart" class="btnAddAction" /></div>
    </form>

Answer 1

您只需将form和select移到循环之外：

<?php
$product_array = $db_handle->runQuery("SELECT * FROM tblproduct ORDER BY id ASC");

if (!empty($product_array)):
?>
    <form method="post" action="index.php?action=add&code=<?php echo $product_array[$key]["code"]; ?>">
    <select id="Select_Product" name="Select_Product" class="select">
    <?php 
        foreach($product_array as $key=>$value):
            echo '<option value=$product_array[$key]["code"]>'.$product_array[$key]["name"].'</option>'; 
        endforeach;
    ?>    
    </select>
    <div>Amount:<input type="text" name="quantity" value="1" size="2" /><input type="submit" value="Add to cart" class="btnAddAction" /></div>
    </form>

<?php
endif;
?>

我也把你转到我喜欢称之为“模板php”的地方。您可以使用冒号和特殊指令的组合来使模板更具可读性，而不是使用括号来打开/关闭逻辑块。如果您更喜欢使用支架，请选择它。这是个人喜欢的事情。

Answer 2

问题出现是因为<form>和<select>标记位于foreach循环内部，因此会为$product_array

的每个元素显示这些标记

你应该在致电foreach

之前先把它们放好

if (!empty($product_array)) { 
    ?>
    <form method="post" action="index.php?action=add&code=<?php echo $product_array[$key]["code"]; ?>">
    <select id="Select_Product" name="Select_Product" class="select">
        <?php
        foreach($product_array as $key=>$value){
            ...

Answer 3

移动表单并从foreach中选择标签

Answer 4

试试这个

<?php $product_array = $db_handle->runQuery("SELECT * FROM tblproduct ORDER BY id ASC"); ?>
    <?php if (!empty($product_array)) {  ?>
        <form method="post" action="index.php?action=add">
        <select id="Select_Product" name="Select_Product" class="select">
        <?php foreach($product_array as $product){ ?>
            <option value="<?php echo $product['code']; ?>"><?php echo $product["name"]; ?></option>
        <?php } ?>
        </select>
<?php } ?>

Answer 5

试试这个：

<form method="post" action="index.php?action=add&code=<?php echo $code; ?>">
    <select id="Select_Product" name="Select_Product" class="select">
<?php
    // YOU SHOULD REMOVE THE FORM & SELECT TAGS FROM THE FOREACH LOOP... THAT SEEMS TO BE THE ISSUE HERE
    // DO IT LIKE SO, THEN...
    // IF YOU NEED THE PRODUCT-CODE ON THE FORM'S ACTION ATTRIBUTE, 
    // YOU MAY WANT TO USE JAVASCRIPT TO WORK-AROUND IT SINCE THE VALUE OF 
    // THE SELECT OPTIONS CORRESPONDS TO A SPECIFIC CODE 

    $product_array = $db_handle->runQuery("SELECT * FROM tblproduct ORDER BY id ASC");
    if (!empty($product_array)) { 
        foreach($product_array as $key=>$value){
    ?>

        <?php
            echo '<option data-code="' . $product_array[$key]["code"] . '" value="' . $product_array[$key]["code"] . '">'.$product_array[$key]["name"].'</option>';
        }
    }
            ?>
    </select>
    <div>Amount:<input type="text" name="quantity" value="1" size="2" /><input type="submit" value="Add to cart" class="btnAddAction" /></div>
</form>

在php下拉菜单中显示mysql行？

5 个答案: