php怎么实现聊天功能
1、在前端使用Ajax定时轮询访问php脚本，php再进行查询聊天数据进行返回给前端，最后前端将其进行渲染；
代码示例：
聊天室 在线用户列表prepare("select * from chat where is_login = '1'"); $rs->execute(); while($row = $rs->fetch()){ echo ''.$row['username'].'
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'; } ?>
CSS3实现自定义聊天窗口下载纯CSS3实现聊天窗口是一款基于CSS3和HTML5的自定义聊天窗口，这里要声明的是它并不能完成聊天的功能，只是提供了聊天窗口的UI，包括，聊天语句的Tooltip样式，还有漂亮的自定义滚动条以及头像图片的处理。这些UI功能都是通过CSS3实现的，希望你能用上。
connect("localhost",11211);
if(isset($_POST['content'])){
$con['username'] = $_SESSION["username"];
$con['content'] = $_POST["content"];
$data = $mem->get('chat');
$data[] = $con;
$mem->set("chat",$data,0,0);
}
$mem->close();
*/
if(isset($_POST['content'])){
session_start();
$filename = date("Ymd",time()).".txt";
if(file_exists($filename)){
$content = file_get_contents($filename);
$data = json_decode($content,true);
$con['username'] = $_SESSION["username"];
$con['content'] = $_POST["content"];
$data[] = $con;
$file = fopen($filename,"w");
fwrite($file,json_encode($data));
fclose($file);
}else{
$file = fopen($filename,"w");
$con['username'] = $_SESSION["username"];
$con['content'] = $_POST["content"];
$data[] = $con;
fwrite($file,json_encode($data));
fclose($file);
}
}
?>$old[0]){
//echo json_encode($new['data']);
//print_r($new);
echo '2222222222'.'
';
}
//echo '
11111111111111111111111111111111111111111111111111111111111111111111';
usleep(1000);
}
*/
/*set_time_limit(0);
$mem = new Memcache;
$mem->connect("localhost",11211);
$count = count($mem->get("chat"));
$com = true;
//$mem->delete('chat');
if($_POST['msg'] == "one"){
exit(json_encode($mem->get("chat")));
}
if($_POST['msg'] == "break"){
$com = false;
}
$time1 = time();
while(true){
if($com){
$data = $mem->get("chat");
if(count($data)>$count){
echo json_encode($data);
break;
}
usleep(300);
}else{
break;
}
}
$mem->close();*/
set_time_limit(0);
$filename = date("Ymd",time()).".txt";
if(file_exists($filename)){
$content = file_get_contents($filename);
$data = json_decode($content,true);
$count = count($data);
// echo $count;die;
if($_POST['msg'] == "one"){
exit(json_encode($data));
}
while(true){
$contents = file_get_contents($filename);
$datas = json_decode($contents,true);
$counts = count($datas);
if($counts>$count){
echo json_encode($datas);
break;
}
usleep(300);
}
}else{
$file = fopen($filename,"w");
$con['username'] = "系统消息";
$con['content'] = "欢迎来到EPGO聊天室";
$data[] = $con;
fwrite($file,json_encode($data));
fclose($file);
exit(json_encode($data));
}
?>2、使用WebSocket和服务器进行长连接，来实现聊天功能。
客户端代码：
websocket聊天室
服务端代码：
initSocket();
}
private function initSocket()
{
try {
//创建socket套接字
$this->_master = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
// 设置IP和端口重用,在重启服务器后能重新使用此端口;
socket_set_option($this->_master, SOL_SOCKET, SO_REUSEADDR, 1);
//绑定地址与端口
socket_bind($this->_master, $this->_ip, $this->_port);
//listen函数使用主动连接套接口变为被连接套接口，使得一个进程可以接受其它进程的请求，从而成为一个服务器进程。在TCP服务器编程中listen函数把进程变为一个服务器，并指定相应的套接字变为被动连接,其中的能存储的请求不明的socket数目。
socket_listen($this->_master, self::LISTEN_SOCKET_NUM);
} catch (Exception $e) {
$this->debug(array("code: " . $e->getCode() . ", message: " . $e->getMessage()));
}
//将socket保存到socket池中
$this->_socketPool[0] = array('resource' => $this->_master);
$pid = getmypid();
$this->debug(array("server: {$this->_master} started,pid: {$pid}"));
while (true) {
try {
$this->run();
} catch (Exception $e) {
$this->debug(array("code: " . $e->getCode() . ", message: " . $e->getMessage()));
}
}
}
private function run()
{
$write = $except = NULL;
$sockets = array_column($this->_socketPool, 'resource');
$read_num = socket_select($sockets, $write, $except, NULL);
if (false === $read_num) {
$this->debug(array('socket_select_error', $err_code = socket_last_error(), socket_strerror($err_code)));
return;
}
foreach ($sockets as $socket) {
if ($socket == $this->_master) {
$client = socket_accept($this->_master);
if ($client === false) {
$this->debug(['socket_accept_error', $err_code = socket_last_error(), socket_strerror($err_code)]);
continue;
}
//连接
$this->connection($client);
} else {
//接受数据
$bytes = @socket_recv($socket, $buffer, 2048, 0);
if ($bytes == 0) {
$recv_msg = $this->disconnection($socket);
} else {
if ($this->_socketPool[(int)$socket]['handShake'] == false) {
$this->handShake($socket, $buffer);
continue;
} else {
$recv_msg = $this->parse($buffer);
}
}
$msg = $this->doEvents($socket, $recv_msg);
echo($msg);
socket_getpeername ( $socket , $address ,$port );
$this->debug(array(
'send_success',
json_encode($recv_msg),
$address,
$port
));
$this->broadcast($msg);
}
}
}
/**
* 数据广播
* @param $data
*/
private function broadcast($data)
{
foreach ($this->_socketPool as $socket) {
if ($socket['resource'] == $this->_master) {
continue;
}
socket_write($socket['resource'], $data, strlen($data));
}
}
/**
* 业务处理
* @param $socket
* @param $recv_msg
* @return string
*/
private function doEvents($socket, $recv_msg)
{
//联系我
}
/**
* socket握手
* @param $socket
* @param $buffer
* @return bool
*/
public function handShake($socket, $buffer)
{
$acceptKey = $this->encry($buffer);
$upgrade = "HTTP/1.1 101 Switching Protocols\r\n" .
"Upgrade: websocket\r\n" .
"Connection: Upgrade\r\n" .
"Sec-WebSocket-Accept: " . $acceptKey . "\r\n\r\n";
// 写入socket
socket_write($socket, $upgrade, strlen($upgrade));
// 标记握手已经成功，下次接受数据采用数据帧格式
$this->_socketPool[(int)$socket]['handShake'] = true;
socket_getpeername ( $socket , $address ,$port );
$this->debug(array(
'hand_shake_success',
$socket,
$address,
$port
));
//发送消息通知客户端握手成功
$msg = array('type' => 'handShake', 'msg' => '握手成功');
$msg = $this->frame(json_encode($msg));
socket_write($socket, $msg, strlen($msg));
return true;
}
/**
* 帧数据封装
* @param $msg
* @return string
*/
private function frame($msg)
{
$frame = [];
$frame[0] = '81';
$len = strlen($msg);
if ($len < 126) {
$frame[1] = $len < 16 ? '0' . dechex($len) : dechex($len);
} else if ($len < 65025) {
$s = dechex($len);
$frame[1] = '7e' . str_repeat('0', 4 - strlen($s)) . $s;
} else {
$s = dechex($len);
$frame[1] = '7f' . str_repeat('0', 16 - strlen($s)) . $s;
}
$data = '';
$l = strlen($msg);
for ($i = 0; $i < $l; $i++) {
$data .= dechex(ord($msg{$i}));
}
$frame[2] = $data;
$data = implode('', $frame);
return pack("H*", $data);
}
/**
* 接受数据解析
* @param $buffer
* @return mixed
*/
private function parse($buffer)
{
$decoded = '';
$len = ord($buffer[1]) & 127;
if ($len === 126) {
$masks = substr($buffer, 4, 4);
$data = substr($buffer, 8);
} else if ($len === 127) {
$masks = substr($buffer, 10, 4);
$data = substr($buffer, 14);
} else {
$masks = substr($buffer, 2, 4);
$data = substr($buffer, 6);
}
for ($index = 0; $index < strlen($data); $index++) {
$decoded .= $data[$index] ^ $masks[$index % 4];
}
return json_decode($decoded, true);
}
// 提取 Sec-WebSocket-Key 信息
private function getKey($req)
{
$key = null;
if (preg_match("/Sec-WebSocket-Key: (.*)\r\n/", $req, $match)) {
$key = $match[1];
}
return $key;
}
//加密 Sec-WebSocket-Key
private function encry($req)
{
$key = $this->getKey($req);
return base64_encode(sha1($key . '258EAFA5-E914-47DA-95CA-C5AB0DC85B11', true));
}
/**
* 连接socket
* @param $client
*/
public function connection($client)
{
socket_getpeername ( $client , $address ,$port );
$info = array(
'resource' => $client,
'userInfo' => '',
'handShake' => false,
'ip' => $address,
'port' => $port,
);
$this->_socketPool[(int)$client] = $info;
$this->debug(array_merge(['socket_connect'], $info));
}
/**
* 断开连接
* @param $socket
* @return array
*/
public function disconnection($socket)
{
$recv_msg = array(
'type' => 'logout',
'msg' => @$this->_socketPool[(int)$socket]['username'],
);
unset($this->_socketPool[(int)$socket]);
return $recv_msg;
}
/**
* 日志
* @param array $info
*/
private function debug(array $info)
{
$time = date('Y-m-d H:i:s');
array_unshift($info, $time);
$info = array_map('json_encode', $info);
file_put_contents(self::LOG_PATH . 'websocket_debug.log', implode(' | ', $info) . "\r\n", FILE_APPEND);
}
}
new socketServer();推荐教程：《PHP教程》
