php - 如何在PHP中检查按钮标签是否被点击

Question

我尝试检查按钮标签是否被单击，然后执行语句，但它似乎不起作用。我错过了什么或者做错了什么吗？非常感谢。

if (isset($_POST['appetizer_button'])) {
    $results = $mysqli->query("SELECT * FROM products ORDER BY id ASC");

    if ($results) { 
        //fetch results set as object and output HTML
        while($obj = $results->fetch_object()) {
            echo '<div class="product">'; 
            echo '<form method="post" action="cart_update.php">';
            // echo '<div class="product-thumb"><img src="images/'.$obj->product_img_name.'"></div>';
            echo '<div class="product-content"><h3>'.$obj->product_name.'</h3>';
            echo '<div class="product-desc">'.$obj->product_desc.'</div>';
            echo '<div class="product-info">';
            echo 'Price '.$currency.$obj->price.' | ';
            echo 'Qty <input type="text" name="product_qty" value="1" size="3" />';
            echo '<button class="add_to_cart">Add To Cart</button>';
            echo '</div></div>';
            echo '<input type="hidden" name="product_code" value="'.$obj->product_code.'" />';
            echo '<input type="hidden" name="type" value="add" />';
            echo '<input type="hidden" name="return_url" value="'.$current_url.'" />';
            echo '</form>';
            echo '</div>';
        }
    // }
    }
}

<td>
    <button name="appetizer_button" onclick="location.href='index.php'">Appetizers & Soup</a></button> |
    <button name="house_button" onclick="location.href='index.php'">House Specials</a></button>
</td>

Answer 1

它必须是这样的:

<form action="index.php" method="post">
<input type="submit" name="appetizer_button" value="Appetizers & Soup">
</form>

这将生成 post 事件，该事件将依次执行您的代码。

回显:

if (isset($_POST['appetizer_button'])) {
    // Your code that you want to execute
}