Question

我应该知道如何根据当天的情况进行背景更改（例如，在31日它转到万圣节图片然后在其他背景上转换到其他背景）PS我应该尝试不使用JavaScript因为我不喜欢使用JavaScript。

Answer 1

您需要一个服务器端功能才能执行此操作。

例如

$date = date("d F"); 

if($date == "18 May"){ 
echo "style=\"background:rgba(0,0,0,1);\"" // don't forget to escape quotes and such 
}

Answer 2

在你的评论中，你说javascript没问题，所以这里是javascript。

这将为您完成：https://jsfiddle.net/4p18mxg9/5/

<强> JAVASCRIPT

    function myFunction() {
    switch (new Date().getDay()) {
    case 0:
        day = "Sunday";
        document.body.style.backgroundImage = "url('http://lorempixel.com/400/200/sports/1/')";
        break;
    case 1:
        day = "Monday";
        document.body.style.backgroundImage = "url('http://lorempixel.com/400/200/sports/1/')";
        break;
    case 2:
        day = "Tuesday";
        document.body.style.backgroundImage = "url('http://lorempixel.com/400/200/sports/1/')";
        break;
    case 3:
        day = "Wednesday";
        document.body.style.backgroundImage = "url('http://lorempixel.com/400/200/sports/1/')";
        break;
    case 4:
        day = "Thursday";
        document.body.style.backgroundImage = "url('http://lorempixel.com/400/200/sports/1/')";
        break;
    case 5:
        day = "Friday";
        document.body.style.backgroundImage = "url('http://lorempixel.com/400/200/sports/1/')";
        break;
    case 6:
        day = "Saturday";
        document.body.style.backgroundImage = "url('http://lorempixel.com/400/200/sports/1/')";
        break;
}
 document.getElementById("demo").innerHTML = "Today is " + day;   


}

如何根据当天更改背景

2 个答案: