我正在尝试使用这个https://github.com/ghedipunk/PHP-Websockets PHP类写一个聊天。现在看起来,在客户端连接到服务器的JS上开始,然后它每3秒发送一次请求,服务器在每个请求中检查数据库中的消息,并将消息发送到客户端。我认为这不好,客户端发送请求一次3秒,我不知道该怎么做,该服务器发送消息给客户端,只有当数据库中有新消息? 这是我的扩展处理功能:使用PHP,websockets和MySQL进行聊天
protected function process($user, $message) {
$databaseHandler = mysqli_connect('blahblah');
$decoded = json_decode($message, true);
$chat_id = $decoded['chatid'];
$limit = $decoded['limit'];
$user_id = filterString($decoded['userid'], $databaseHandler);
$SQLQuery = "SELECT chat_messages.message, users.name FROM chat_messages JOIN users ON chat_messages.user_id=users.user_id WHERE chat_messages.chat_id = '$chat_id' ORDER BY chat_messages.message_id DESC LIMIT $limit,5;";
$SQLResult = mysqli_query($databaseHandler, $SQLQuery);
$i = 0;
$arr = array();
while ($row = mysqli_fetch_assoc($SQLResult)) {
$i++;
$arr[$i] = $row['name'] . ': ' . $row['message'];
}
$this->send($user, json_encode($arr));
}
这是JS功能:
function refreshchat() {
try {
socket.send('{"token":"' + token + '","userid":'+ userid +'"chatid":' + chatid + ',"limit":' + limit + '}');
} catch (ex) {
console.log(ex);
}
setTimeout(refreshchat, 3000);
}
我跳过授权的东西,在PHP的间隙。
预先感谢您!