How to use PHP to implement progress bars and components in WeChat mini programs

With the continuous popularity of WeChat mini programs, more and more developers are beginning to pay attention to the development of WeChat mini programs. In WeChat mini programs, progress bars and components are usually used to improve user experience and interface aesthetics. This article will introduce how to use PHP to implement the progress bar and components in the WeChat applet.

1. Progress bar

1. Use HTML and CSS to create a progress bar

First, we can create a simple progress bar using HTML and CSS. The HTML code is as follows:

<div class="progress">
  <div class="progress-bar" style="width: 50%;"></div>
</div>

The CSS code is as follows:

.progress {
  width: 100%;
  height: 20px;
  background-color: #f5f5f5;
  border-radius: 10px;
}

.progress-bar {
  height: 20px;
  background-color: #4CAF50;
  border-radius: 10px;
  text-align: center;
  line-height: 20px;
  color: white;
}

2. Embed the progress bar into the WeChat applet

In the WeChat applet, we Progress bars can be embedded into the interface using the WXML and WXSS languages. The WXML code is as follows:

<view class="progress">
  <view class="progress-bar" style="width: {{progress}}%;"></view>
</view>

The WXSS code is as follows:

.progress {
  width: 100%;
  height: 20px;
  background-color: #f5f5f5;
  border-radius: 10px;
}

.progress-bar {
  height: 20px;
  background-color: #4CAF50;
  border-radius: 10px;
  text-align: center;
  line-height: 20px;
  color: white;
}

Among them, progress represents the progress of the progress bar, and the progress of the progress bar can be dynamically changed by modifying the value of this variable in JS.

3. Use PHP combined with the WeChat applet to implement the progress bar

In the WeChat applet, we usually use PHP to obtain data from the server and render it into the applet interface . We can create a PHP file on the server side and get the progress value of the progress bar by passing in a parameter. The PHP code is as follows:

<?php
  $progress = $_GET['progress'];
?>

Then, in the applet, you can send a request to the server and obtain the progress value by using the wx.request() function. The JS code is as follows:

wx.request({
  url: 'http://example.com/progress.php?progress=50',
  success: function(res) {
    console.log(res.data);
    that.setData({
      progress: res.data
    })
  }
})

Among them, the url parameter is the address of the server-side PHP file, and the progress parameter is the progress value of the progress bar. After the request is successful, the progress value can be rendered to the mini program interface through the setData() function.

2. Components

WeChat applet provides many components, including buttons, inputs, images, views, etc., which are very convenient to use. But if you need to use custom components, how to implement it? We can combine PHP and WeChat applet to implement custom components.

1. Create custom components

In the mini program, we can use WXML and WXSS languages ​​to create custom components. The WXML code is as follows:

<view class="custom-component">
  <image src="{{imageSrc}}" mode="{{mode}}"></image>
  <text>{{text}}</text>
</view>

The WXSS code is as follows:

.custom-component {
  display: flex;
  justify-content: center;
  align-items: center;
}

.custom-component image {
  width: 80px;
  height: 80px;
}

.custom-component text {
  margin-left: 20px;
  font-size: 24rpx;
  color: #333;
}

2. Dynamicly change custom components in PHP

On the server side, we can use PHP To dynamically change the property values ​​of custom components. The PHP code is as follows:

<?php
  $imageSrc = $_GET['imageSrc'];
  $mode = $_GET['mode'];
  $text = $_GET['text'];
?>

Then, in the applet, you can use the wx.request() function to send a request to the server and obtain data, and dynamically change the attribute values ​​​​of the custom component. The JS code is as follows:

wx.request({
  url: 'http://example.com/component.php?imageSrc=../images/avatar.png&mode=aspectFill&text=Hello%20World',
  success: function(res) {
    console.log(res.data)
    that.setData({
      imageSrc: res.data.imageSrc,
      mode: res.data.mode,
      text: res.data.text
    })
  }
})

Among them, the url parameter is the address of the server-side PHP file, and imageSrc, mode and text are the attribute values ​​of the custom component.

To sum up, using PHP combined with WeChat applet can implement progress bars and components, thereby improving the user experience and the aesthetics of the interface.

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