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网页游戏能用PHP做后端开发吗？

当然可以。最好走HTTP，也可以做网络编程，而且写代码超简单，1个函数就可以建一个服务器端。stream_socket_server()
多线程不是什么好主意，你可以用php libevent扩展，异步高并发。PHP还有很多网络的扩展包。
PHP的开发效率高，.net Java ，你足够有钱，可以用。

libevent是一个基于事件驱动的高性能网络库。支持多种 I/O 多路复用技术， epoll、 poll、 dev/poll、 select 和 kqueue 等；支持 I/O，定时器和信号等事件；注册事件优先级。
PHP libevent扩展安装：
libevent扩展依赖于原始的libevent库，必须先把libevent库安装。
(1)安装libevent库

1. wget http://cloud.github.com/downloads/libevent/libevent/libevent-2.0.20-stable.tar.gz
2. tar zxvf libevent-2.0.20-stable.tar.gz
3. cd libevent-2.0.20-stable/
4. ./configure --prefix=/usr/local/libevent-2.0.20/
5. make
6. make install

(2)安装libevent扩展(http://pecl.php.net/package/libevent)

1. wget http://pecl.php.net/get/libevent-0.1.0.tgz
2. tar -zxvf libevent-0.1.0.tgz
3. cd libevent-0.1.0
4. ./configure --with-php-config=/usr/local/php54/bin/php-config --with-libevent=/usr/local/libevent-2.0.20/
5. make && make install
6. #php.ini添加extension=libevent.so

PHP Libevent扩展介绍：
(1)常量

(2)函数

PHP Libevent扩展使用：
例1:5s后触发callback

1. $base = event_base_new();
2. $event = event_new();
3.  
4. event_set($event, 0, EV_TIMEOUT, function() {
5. echo "function called";
6. });
7. event_base_set($event, $base);
8.  
9. event_add($event, 5000000);
10. event_base_loop($base);

例2：打印输入流

1. function print_line($fd, $events, $arg)
2. {
3. static $max_requests = 0;
4. $max_requests++;
5. if ($max_requests == 10) {
6. // exit loop after 10 writes
7. event_base_loopexit($arg[1]);
8. }
9. echo fgets($fd);
10. }
11.  
12. // create base and event
13. $base = event_base_new();
14. $event = event_new();
15.  
16. $fd = STDIN;
17. // set event flags
18. event_set($event, $fd, EV_READ | EV_PERSIST, ‘print_line‘, array($event, $base));
19. // set event base
20. event_base_set($event, $base);
21. // enable event
22. event_add($event);
23. // start event loop
24. event_base_loop($base);

例3：实现简单web server
在cli执行后，打开浏览器2000端口试试看。

1. $socket = stream_socket_server (‘tcp://0.0.0.0:2000‘, $errno, $errstr);
2. stream_set_blocking($socket, 0);
3.  
4. $base = event_base_new();
5. $event = event_new();
6. event_set($event, $socket, EV_READ | EV_PERSIST, ‘ev_accept‘, $base);
7. event_base_set($event, $base);
8. event_add($event);
9. event_base_loop($base);
10.  
11. function ev_accept($socket, $flag, $base)
12. {
13. $connection = stream_socket_accept($socket);
14. stream_set_blocking($connection, 0);
15.  
16. $buffer = event_buffer_new($connection, ‘ev_read‘, NULL, ‘ev_error‘, $connection);
17. event_buffer_base_set($buffer, $base);
18. event_buffer_timeout_set($buffer, 30, 30);
19. event_buffer_watermark_set($buffer, EV_READ, 0, 0xffffff);
20. event_buffer_priority_set($buffer, 10);
21. event_buffer_enable($buffer, EV_READ | EV_PERSIST);
22.  
23. $GLOBALS[‘_‘] = $buffer; //这个buffer一定要赋给个全局的变量 貌似是传值过程中的bug 或者5.3.8的闭包还是有问题？
24. }
25.  
26. function ev_error($buffer, $error, $connection)
27. {
28. event_buffer_disable($buffer, EV_READ | EV_WRITE);
29. event_buffer_free($buffer);
30. fclose($connection);
31. }
32.  
33. function ev_read($buffer, $connection)
34. {
35. while ($read = event_buffer_read($buffer, 256)) {
36.  
37. }
38. fwrite($connection , date(‘Y-m-d H:i:s‘));
39. ev_error($buffer , ‘‘ , $connection);
40. }

参考资料：

• http://blog.csdn.net/laoyi_grace/article/details/6539244
• http://www.ibm.com/developerworks/cn/aix/library/au-libev/index.html
• http://blog.csdn.net/shagoo/article/details/6396089 

【转】网页游戏能用PHP做后端开发吗？ PHP Libevent扩展安装及应用

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原文地址：http://www.cnblogs.com/mimime/p/5450117.html