我要做的就是从数据库中获取一个字符串并将其显示在我的网站上,但是要不断刷新它。这是一个朋友快速为我编写的代码,但是我对此一无所知,他不在这里帮助我,我需要在今晚之前完成。
查询只是
$ sql =“从灯选择状态”;
$ result = $ conn-> query($ sql);
我知道这应该很容易,但是我真的不知道。谢谢分配!
setInterval(function() {
// Variables
let URL = "/localhost/form.php";
let request = new XMLHttpRequest();
let response = null;
// Response
request.onreadystatechange = function() {
// Checks
if (request.readyState != 4) { return false }
if (request.status == 521) { response = null }
if (request.status == 520) { response = null }
if (request.status == 508) { response = null }
if (request.status == 500) { response = null }
if (request.status == 500) { response = null }
if (request.status == 403) { window.location.reload() }
if (request.status == 302) { response = null }
if (request.responseText) { response = request.responseText } else { response = null }
// USE THE VALUE OF response TO UPDATE THE PAGE
console.log("Server responded with:", response);
}
// Submit
request.open('GET', URL, true);
request.send(null);
}, 1001);
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js">
setInterval(function() {
// Variables
let url = "/localhost/form.php";
// Get
$.get(url, function(d) {
// check if data (d) is valid
// update ui accordingly [Eg. $("#abc").text(d)]
console.log(d);
});
}, 1001);
</script>
答案 0 :(得分:0)
对于您的网页,可以使用:
<body>
<div class='updatable'></div> // element in your page to display the text
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script> // get hold of jquery
<script>
$(document).ready(function(){ //wait until page is ready
setInterval(function() { // this will execute the function every 1s
// Variables
let url = "form.php"; // locaiton of your form page
// Get
$.get(url, function(d) { // jquery function that 'does' the GET request
$('.updatable').text(d) // when we have a returned request, populate the element above with the body of the returned request ( plain text )
});
}, 1000); // here we have set 1s (1000 ms)
})
</script>
</body>
对于form.php
类似:
$conn = new mysqli connection
$sql = "SELECT status FROM light";
$result = $conn->query($sql);
echo $result;