将事件侦听器绑定到您的折扣代码输入字段,并通过ajax将该值提交给发生更改的服务器。
查询数据库中的代码,并在代码匹配时按照您认为合适的方式返回值。
在您的ajax调用中处理服务器响应,并使用已在页面上显示的值替换从服务器接收到的值。
所以是的,很容易。
编辑
我给你做一个WordPress插件。它非常简单,但它做你想做的,并希望展示如何把一个插件的wordpress的基本概念。
我对您的HTML进行了一些更改。我不得不为所有包含价格的TD添加一个类,以便jQuery可以迭代这些值,并且我添加了一个用于输入代码的输入框,一个提交按钮和一个空的span标签,它将结果显示给用户。您可以更改这些以适应,但如果您更改ID,您将不得不在JavaScript文件中更改对它们的引用。
我的HTML看起来像这样:
<table id="rates">
<tbody>
<tr>
<td>
Single
</td>
<td>
1
</td>
<td class="Price">
140
</td>
</tr>
<tr>
<td>
Double
</td>
<td>
2
</td>
<td class="Price">
210
</td>
</tr>
<tr>
<td>
Suite
</td>
<td>
4
</td>
<td class="Price">
320
</td>
</tr>
</tbody>
</table>
<input type="text" placeholder="Enter discount code" id="promocode">
<button id="discount">
Apply discount
</button>
<span id="message"></span>
在你的WordPress插件目录下新建一个目录,并把它称为折扣码或类似的东西,那么以下内容作为检查的折扣,code.php:
<?php
/**
* Plugin Name: Check discount codes
* Plugin URI: https://www.example.com
* Description: Simple plugin that uses Ajax in WordPress to check discount codes and apply discounts
* Version: 1.0.0
* Author: miknik
* Author URI: https://www.example.com
* License: GPL2
*/
add_action('wp_enqueue_scripts', 'ajax_discount_checker_script');
function ajax_discount_checker_script() {
if (is_page('ENTER-YOUR-PAGE-NAME/SLUG/ID-HERE')){ // Use page name/ID with the table on, so the js only loads on that page
wp_enqueue_script('custom_discount_code_js', plugins_url('/custom_discount_code.js', __FILE__), array('jquery'), '1.0',
true);
wp_localize_script('custom_discount_code_js', 'checkDiscountCode', array(
'ajax_url' => admin_url('admin-ajax.php')
));
}
}
// Follwing two lines set the 'action' parameter you post to admin-ajax.php followed by the function which is called by that action
// wp_ajax_nopriv sets the function called if user is not logged in while wp_ajax sets the function for logged in users
add_action('wp_ajax_nopriv_check_discount_code', 'check_discount_code');
add_action('wp_ajax_check_discount_code', 'check_discount_code');
function check_discount_code() {
$discountten = 'KOD1'; // These are the discount codes which are valid. Add more or change to suit
$discountfifteen = 'KOD2'; // If you change or add to them make sure you use uppercase letters
$discounttwenty = 'KOD3';
$dcode = strtoupper(sanitize_text_field($_POST['dcode'])); // Sanitizes the POST value and converts to uppercase
if ($dcode === $discountten) {
$response = array('message' => 'Your 10% discount has been applied','discount' => 10);
}
else if ($dcode === $discountfifteen) { // Create arrays with a message for the user and a discount rate in percent
$response = array('message' => 'Your 15% discount has been applied', 'discount' => 15);
}
else if ($dcode === $discounttwenty) {
$response = array('message' => 'Your 20% discount has been applied', 'discount' => 20);
}
else { // Error message for users who submit an invalid code
$response = array('message' => 'Sorry the discount code you have entered is not valid', 'discount' => 0);
}
echo json_encode($response); // Output the array as json to be returned to your javascript ajax call
wp_die(); // Terminates the script - if you omit this then a 0 wil be added to the end of the output which will break your json
}
后来终于救下在同一个目录中custom_discount_code.js
jQuery('#discount').click(function() { // Binds this function to run when HTML element with id=discount is clicked
var dcode = jQuery('#promocode').val(); // Sets variable dcode to the value entered in element with id=promocode
jQuery.ajax({ // Makes ajax call to Wordpress ajax url
url : checkDiscountCode.ajax_url, // checkDiscountCode is included in wp_localize_script in php file
type : 'post', // this is necessary for users who are not logged in
dataType: 'json', // set the expected server response type to json
data : {
action : 'check_discount_code', // action value must match value defined in add_action in php file
dcode : dcode // posts the dcode variable as $_POST['dcode']
},
success : function(response) { // the response variable contains the entire json response from the server
var discount_pct = Number(response.discount); // adding .discount returns the value of that key in the array
jQuery('#message').text(response.message); // insert the message into the empty span
if (discount_pct > 0) { // Only update the prices if the discount is above 0
jQuery('.Price').each(function(i) { // Iterate over all the prices
var price = jQuery(this).text(); // Get the current price
var discount = -(price * discount_pct/100); // Calculate the discount amount
var total = Number(price) + Number(discount); // Subtract the discount from original price
jQuery(this).text(total.toFixed(0)); // Display the discounted price as a whole number
});
jQuery('#discount').off(); // Disable the button once a discount has been applied
}
}
});
});
确保在php文件中已经在表格所在的站点上设置了页面的名称/ ID,然后在wordpress仪表板中激活插件,您应该很好。经过测试,并在我的一个WordPress的安装工作。
玩得开心。
好吧,所以也许不是那么容易:)我不能按照这些说明。可能正在寻找一个插件推荐或我可以使用的代码片断。安全不是问题,这些不是超级密码,他们仍然得到证实。不管怎么说,还是要谢谢你。 – JuroC
堆栈溢出的一般情况是人们会帮助你做家庭作业,但他们不会为你做。说过我们都是新的,所以我很乐意给你一些东西让你开始,但是你需要发布你已经用于费率表的代码,也许是一个链接到页面,所以我可以有看看。你想让你的折扣码降价一定的比例,还是达到一定的价格? – miknik
好的,所以我在网站的旧版本上工作,我写回了纯HTML。回到然后我用这种方法: '代码 <表格ID = “form1的” 名称= “form1的” 方法= “GET” 行动= “validate.php”> '代码 – JuroC