"Go" web games can be used in PHP for backend development? PHP libevent extension Installation and application

can web games use PHP for back-end development?

Of course. The best way to go http, you can do network programming, and write code is very simple, 1 functions can be built on a server side. Stream_socket_server ()
Multithreading is not a good idea, you can use PHP libevent extension, asynchronous high concurrency. PHP also has a lot of network expansion packs.
PHP is highly developed,. NET Java, you are rich enough to use.

PHP libevent extension Installation and application

Libevent is an event-driven, high-performance network library. Supports multiple I/O multiplexing Technologies, Epoll, poll, Dev/poll, select, and Kqueue, support for events such as I/O, timers and Signals, and register event priorities.
PHP libevent Extension Installation:
The libevent extension relies on the original Libevent library, and the Libevent library must be installed first.
(1) Installing the Libevent Library

2. wget http://cloud.github.com/downloads/libevent/libevent/libevent-2.0.20-stable.tar.gz
4. Tar zxvf libevent-2.0. -stable. Tar. GZ
6. CD libevent-2.0. -Stable/
8. ./Configure --prefix=/usr/local/libevent-2.0. /
10. Make
12. Make install

(2) Installing the libevent extension (http://pecl.php.net/package/libevent)

2. wget http://pecl.php.net/get/libevent-0.1.0.tgz
4. Tar -zxvf libevent-0.1. 0.tgz
6. CD libevent-0.1. 0
8. ./configure --with-php-config= /usr/local/php54/< Span class= "PLN" >bin/php-config --with-libevent= /usr/local/libevent- 2.0. 20
10. Make && make install
12. #php. ini Add extension=libevent.so

Introduction to PHP libevent Extensions:
(1) Constants

(2) function

• Event_base_free () frees the resource, which cannot destroy the binding event
• Event_base_loop () Handles events and handles event loops based on the specified base
• Event_base_loopbreak () immediately cancels the event loop, with the same behavior for each break statement
• Event_base_loopexit () exits the loop after a specified time
• Event_base_new () creation and initial events
• Event_base_priority_init () Sets the priority of the event
• Event_base_set () Associating events to event base
• Event_buffer_base_set () Associating cached events to Event_base
• Event_buffer_disable () disabling a cached event
• Event_buffer_enable () enable a specified cached event
• Event_buffer_fd_set () Change the file system description of a cache
• Event_buffer_free () releasing cache events
• Event_buffer_new () to create a new cache event
• Event_buffer_priority_set () Priority setting for cache events
• Event_buffer_read () reading data from a cache event
• Event_buffer_set_callback () Sets or resets the callback Hansh function to the cached event
• Event_buffer_timeout_set () sets the read and write time to timeout for a cached event
• Event_buffer_watermark_set setting watermark flags for read and write events
• Event_buffer_write () writes data to the cache event
• Event_add () Adds an execution event to the specified settings
• Event_del () Removing events from the set events
• Event_free () empty event handle
• Event_new () Create a new event
• Event_set () Prepare to add an event in Event_add

PHP libevent Extensions use:
Example 1:5s after triggering callback

2. $base = event_base_new();
4. $event = event_new();
8. Event_set($event, 0, ev_timeout, function() {
10. echo "function called";
12. });
14. Event_base_set($event, $base);
18. Event_add($event, 5000000);
20. Event_base_loop($base);

Example 2: printing an input stream

2. function print_line($fd, $events, $arg)
4. {
6. static $max _requests = 0;
8. $max _requests+ +;
10. if ($max _requests = = ) {
12. //Exit loop after ten writes
14. Event_base_loopexit($arg[1]);
16. }
18. echo fgets($fd);
20. }
24. Create Base and Event
26. $base = event_base_new();
28. $event = event_new();
32. $FD = STDIN;
34. Set Event Flags
36. Event_set($event, $fd, ev_read | Ev_persist, ' Print_line ', array($event, $base));
38. Set Event Base
40. Event_base_set($event, $base);
42. Enable Event
44. Event_add($event);
46. Start Event Loop
48. Event_base_loop($base);

Example 3: Implementing a simple Web server
After the CLI executes, open the browser 2000 port and try again.

2. $socket = stream_socket_server (' tcp://0.0.0.0:2000 ', $errno, $errstr) ;
4. Stream_set_blocking($socket, 0);
8. $base = event_base_new();
10. $event = event_new();
12. Event_set($event, $socket, ev_read | Ev_persist, ' ev_accept ', $base);
14. Event_base_set($event, $base);
16. Event_add($event);
18. Event_base_loop($base);
22. function ev_accept($socket, $flag, $base)
24. {
26. $connection = stream_socket_accept($socket);
28. Stream_set_blocking($connection, 0);
32. $buffer = event_buffer_new($connection, ' Ev_read ', NULL, ' ev_ Error ', $connection);
34. Event_buffer_base_set($buffer, $base);
36. Event_buffer_timeout_set($buffer, + );
38. Event_buffer_watermark_set($buffer, ev_read, 0, 0xffffff);
40. Event_buffer_priority_set($buffer, ten);
42. Event_buffer_enable($buffer, ev_read | Ev_persist);
46. $GLOBALS[' _ '] = $buffer; //This buffer must be assigned to a global variable that seems to be a bug in the process of passing the value or a 5.3.8 closure or a problem?
48. }
52. function ev_error($buffer, $error, $connection)
54. {
56. Event_buffer_disable($buffer, ev_read | Ev_write);
58. Event_buffer_free($buffer);
60. Fclose($connection);
62. }
66. function ev_read($buffer, $connection)
68. {
70. while ($read = event_buffer_read($buffer, up )) {
74. }
76. Fwrite($connection , date(' y-m-d h:i:s '));
78. Ev_error($buffer , " , $connection);
80. }

Resources:

• 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

"Go" web games can be used in PHP for backend development? PHP libevent extension Installation and application