从客户端获取Redis的新值

Question

I'm using PHP with PHPRedis to connect to Redis.

This works fine

            $redis = new Redis();
            $redis->connect('localhost', 6379);
            $total = $redis->get('total');

Let's say $total is now 1. I then use the Redis client to increment the key 'total' so that it has a value of 2.

But now I want a user to be able to see the new value when they click a button

        <script type="text/javascript">
            window.onload=function() {
                $('#newTotal').click(function (event) {
                        <?php
                            $redis = new Redis();
                            $redis->connect('localhost', 6379);
                            $total = $redis->get('total');
                        ?>
                        $("#updated").html("Total is now <?php echo $total; ?>");

                });
            }
        </script>

But this does not give the new value.

How can I connect to get the updated values?

Answer 1

You have to understand, PHP is running on the server-side and jQuery is on the client. That being said you'll need to use AJAX. The following would be one quick way to do it:

$('#newTotal').click(function (event) {
    $.ajax({
        url: 'yourPHPfile.php',
        type: 'GET',
        success: function(data) {
            $("#updated").html("Total is now " + data);
        }
    });
});

And in the yourPHPfile

 $redis = new Redis();
 $redis->connect('localhost', 6379);
 $total = $redis->get('total');

 echo $total; //this is seen as the "data" parameter in the AJAX success