Implementation method of linear switching layout developed in PHP in WeChat mini program

With the increasing popularity of WeChat mini programs, more and more developers are beginning to try to combine mini program development with PHP. Among them, linear switching layout is one of the commonly used layout methods in mini programs. This article will introduce how to use PHP to implement linear switching layout in WeChat mini programs.

1. What is linear switching layout

Linear switching layout refers to a method in which a set of data is displayed tiled in a mini program, and the displayed content can be switched by sliding left or right. This kind of layout is relatively common in mini programs. For example, the carousel chart in mini programs is a linear switching layout.

2. Implementation steps

1. Add the wx:scroll-view component to the mini program page and set the horizontal scroll bar to turn on:

<scroll-view class="list" scroll-x="true">
    <!-- 循环渲染数据 -->
</scroll-view>

2. Get the data that needs to be displayed in PHP and convert it to JSON format through the json_encode() method:

$data = array(
    array('title'=>'标题1', 'desc'=>'描述1'),
    array('title'=>'标题2', 'desc'=>'描述2'),
    // ...
);
echo json_encode($data);

3. Send it to the PHP server through the wx.request method in the applet Request and render the returned JSON data into the scroll-view component:

wx.request({
    url: 'http://example.com/getData.php',
    success: function(res) {
        var data = res.data;
        var html = '';
        for (var i=0; i<data.length; i++) {
            html += '<view class="item">';
            html += '<view class="title">' + data[i].title + '</view>';
            html += '<view class="desc">' + data[i].desc + '</view>';
            html += '</view>';
        }
        // 将组装好的html渲染到scroll-view组件中
        $('.list').html(html);
    }
});

4. Control the sliding effect. Control the sliding distance by setting the scroll-left attribute of the scroll-view component, and bind this attribute to the data of the mini program page to achieve the sliding effect:

data: {
    scrollLeft: 0
},
onReady: function() {
    var that = this;
    setInterval(function() {
        var scrollLeft = that.data.scrollLeft + 300;
        that.setData({
            scrollLeft: scrollLeft
        });
    }, 3000);
}

At this point, a based on PHP's linear switching layout is implemented.

3. Notes

1. The JSON data returned by PHP must be in standard JSON format, otherwise it cannot be parsed normally in the mini program.
2. The style of the component can be customized and modified according to needs, but be sure to ensure that the class name is consistent with the name in the style sheet.
3. In the code that controls the sliding effect, the parameter value of the setInterval method can be customized and modified according to needs. The parameters in this method represent the sliding interval time.

4. Summary

It is not difficult to use PHP to implement linear switching layout in WeChat applet. You only need to convert the data into JSON format through the json_encode() method and render it. Go to the scroll-view component, and then control the sliding effect by setting the properties of the scroll-view component. I hope this article can provide some help to developers who need to use PHP to implement linear switching layout in small programs.

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