PHP从MySQLI获取数据[删除此]

Question

Hello I'm trying to get live data from sql table, example if one rows is inserted show me with data like notification system

with my code when i insert new row not fetch me... !?

index.php:

 <script src="http://code.jquery.com/jquery-2.1.4.min.js"></script>
    <script>
        $(document).ready(function() {
            setTimeout(
            function() {updateChat();},
            1000);

            function updateChat() {
                $.get("read.php", function(data)
                {
                  $("#Show_Data").html(data);
                });
            }
        });
    </script>
    <div id="Show_Data"></div>

read.php

include('config.php');

$sql_query = mysqli_query($connection, "SELECT * FROM shout_box where id > 15 ORDER BY id");

while($fetch_data = mysqli_fetch_array($sql_query, MYSQLI_ASSOC)) {
    echo 'ID: ' .$fetch_data['id']. ' Text: '. $fetch_data['text']. '</br>';
}

mysqli_close($connection);

Answer 1

Use setInterval

var myCall = setInterval(updateChat, 1000);

//for to stop calling
function myStopFunction() {
   clearInterval(myCall);
}

The setInterval() method calls a function or evaluates an expression at specified intervals (in milliseconds).

The setInterval() method will continue calling the function until clearInterval() is called, or the window is closed.

Answer 2

it's a dirty job but fine. you must not get ALL data from database every 1s. there is huge data after a long chat. so you can save last row id that you get from db in an attribute. then after 1s you must check all rows after that id or after that time (i see u have a date_time for every row).