How to use PHP to implement the slider function in WeChat mini program

With the popularity of WeChat mini programs, their functions are becoming more and more diverse. Among them, the slider function is a very commonly used component, which can perform sliding selection, filtering and other operations on the interface, and it is no exception in WeChat mini programs. This article will introduce how to use PHP to implement the slider function in WeChat applet.

1. Introduction to slider function

The so-called slider refers to a movable drag bar that can be dragged to a specific position to achieve the effect of adjusting the target value. In WeChat mini programs, sliders are usually used for analysis, filtering, sorting and other operations. At the same time, in order to better improve the user experience, the WeChat applet also provides a slider with sliding prompts (such as value). When using it, you only need to introduce the corresponding components into the code.

2. Steps to use PHP to implement the slider function

Since the WeChat applet is a JavaScript-based application, we usually use JavaScript to implement the slider operation. However, in order to integrate more closely with the PHP code, this article will introduce how to use PHP to implement the slider operation in the WeChat applet.

1. In the WeChat applet, use wx.createSlider to initialize the slider.

Page({
  data: {
    value: 50
  },
  onLoad: function () {
    this.slider = wx.createSlider({
      min: 0,
      max: 100,
      value: this.data.value,
      showValue: true,
      onChange: this.changeValue.bind(this)
    })
  },
  onReady: function () {
    this.slider.appendTo(this.selectComponent('#slider'))
  },
  changeValue: function (e) {
    this.setData({
      value: e.target.value
    })
  }
})

2. In PHP, use JavaScript functions to implement the settings of the slider in the WeChat applet.

mPDF::$func_js .= "function initSlider() {
  let slider = wx.createSlider({
    min: 0,
    max: 100,
    value: 50,
    showValue: true,
    onChange: function (e) {
      document.getElementById('value').innerHTML = e.target.value
    }
  })
  slider.appendTo(document.getElementById('slider'))
}"

$html = '<div id="slider"></div>';
$html .= '<div id="value">50</div>';
$html .= '<script>initSlider();</script>';

3. Replace variables in your PHP code with actual data so the slider can change and update based on that data.

$value = $_POST['value'];
$mPDF->useTemplate($template);
$mPDF->writeHTML("<div id='slider'></div>");
$mPDF->writeHTML("<div id='value'>$value</div>");
$mPDF->writeHTML('<script>initSlider();</script>');

3. Summary

This article mainly introduces how to use PHP to implement the slider function in the WeChat applet. During the implementation process, we can use JavaScript functions to complete operations such as initialization, changes, and updates of the slider. In this way, we can achieve good collaboration between PHP and JavaScript and provide a more flexible and efficient solution for the slider operation of the WeChat applet.

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