[英]PHP Sort by using drop-down box
I am basically creating a website and it is a site that sells mobile phones. 我基本上是在创建一个网站,它是一个销售手机的网站。 I need to find a way using PHP to create a drop-down box that can sort the phones by model, brand, screen size etc. (Fields already in my SQL database).
我需要找到一种使用PHP创建下拉框的方法,该框可以按型号,品牌,屏幕尺寸等对电话进行排序。(我的SQL数据库中已经包含了字段)。 What is the simplest way of going about this?
最简单的方法是什么? I am quite new to PHP and not too sure how to go about it.
我对PHP还是很陌生,不太确定如何去做。
You handle sorting in your MySQL queries: 您可以在MySQL查询中处理排序:
SELECT * FROM <<table>> ORDER BY 'Brand' DESC
and then call the results in your page; 然后在您的页面中调用结果; you can't re-order the query via javascript (user-side) since the query is called server-side.
您无法通过javascript(用户端)对查询进行重新排序,因为该查询称为服务器端。
You can use $_GET
variables to achieve that. 您可以使用
$_GET
变量来实现。 Something like this 像这样
<?php
// Let's say that my products category is a $_GET variable
$category_id = isset($_GET['category_id']) && is_numeric($_GET['category_id']) ? $_GET['category_id'] : 1; // where 1 is a default category to show!
?>
<select onchange="if(this.value != '') document.location = '/my-phones-category.php?category_id=<?php echo $category_id; ?>&order_by=' + this.value">
<option value="">Choose an option</option>
<option value="model"<?php if(isset($_GET['order_by']) && $_GET['order_by'] == 'model') echo ' selected="selected"'; ?>>Model</option>
<option value="brand"<?php if(isset($_GET['order_by']) && $_GET['order_by'] == 'brand') echo ' selected="selected"'; ?>>Brand</option>
</select>
Then we have to see how we can make our query to add the right order 然后,我们必须查看如何进行查询以添加正确的顺序
<?php
switch($_GET['order_by']) {
case 'model':
$order_by = " ORDER BY products.product_model";
break;
case 'brand':
$order_by = " ORDER BY products.product_brand";
break;
default:
$order_by = " ORDER BY products.product_price";
}
// Now we have the order and we can make the query
$sql = $mysqli->query("SELECT product_name, product_price
FROM products
WHERE category_id='" . $category_id . "'
$order_by");
?>
Good luck! 祝好运!
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