PHP SOCKET编程详解

<?php 
/** 
 * File name server.php 
 * 服务器端代码 
 * 
 * @author guisu.huang 
 * @since 2012-04-11 
 * 
 */ 
 
//确保在连接客户端时不会超时 
set_time_limit(0); 
//设置IP和端口号 
$address = "127.0.0.1"; 
$port = 2046; //调试的时候，可以多换端口来测试程序！ 
/** 
 * 创建一个SOCKET 
 * AF_INET=是ipv4 如果用ipv6，则参数为 AF_INET6 
 * SOCK_STREAM为socket的tcp类型，如果是UDP则使用SOCK_DGRAM 
*/ 
$sock = socket_create(AF_INET, SOCK_STREAM, SOL_TCP) or die("socket_create() 失败的原因是:" . socket_strerror(socket_last_error()) . "/n"); 
//阻塞模式 
socket_set_block($sock) or die("socket_set_block() 失败的原因是:" . socket_strerror(socket_last_error()) . "/n"); 
//绑定到socket端口 
$result = socket_bind($sock, $address, $port) or die("socket_bind() 失败的原因是:" . socket_strerror(socket_last_error()) . "/n"); 
//开始监听 
$result = socket_listen($sock, 4) or die("socket_listen() 失败的原因是:" . socket_strerror(socket_last_error()) . "/n"); 
echo "OK\nBinding the socket on $address:$port ... "; 
echo "OK\nNow ready to accept connections.\nListening on the socket ... \n"; 
do { // never stop the daemon 
 //它接收连接请求并调用一个子连接Socket来处理客户端和服务器间的信息 
 $msgsock = socket_accept($sock) or die("socket_accept() failed: reason: " . socket_strerror(socket_last_error()) . "/n"); 
  
 //读取客户端数据 
 echo "Read client data \n"; 
 //socket_read函数会一直读取客户端数据,直到遇见\n,\t或者\0字符.PHP脚本把这写字符看做是输入的结束符. 
 $buf = socket_read($msgsock, 8192); 
 echo "Received msg: $buf \n"; 
  
 //数据传送 向客户端写入返回结果 
 $msg = "welcome \n"; 
 socket_write($msgsock, $msg, strlen($msg)) or die("socket_write() failed: reason: " . socket_strerror(socket_last_error()) ."/n"); 
 //一旦输出被返回到客户端,父/子socket都应通过socket_close($msgsock)函数来终止 
 socket_close($msgsock); 
} while (true); 
socket_close($sock); 

<?php 
/** 
 * File name:client.php 
 * 客户端代码 
 * 
 * @author guisu.huang 
 * @since 2012-04-11 
 */ 
set_time_limit(0); 
 
$host = "127.0.0.1"; 
$port = 2046; 
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)or die("Could not create socket\n"); // 创建一个Socket 
 
$connection = socket_connect($socket, $host, $port) or die("Could not connet server\n"); // 连接 
socket_write($socket, "hello socket") or die("Write failed\n"); // 数据传送 向服务器发送消息 
while ($buff = socket_read($socket, 1024, PHP_NORMAL_READ)) { 
 echo("Response was:" . $buff . "\n"); 
} 
socket_close($socket); 

/* {{{ proto resource socket_create(int domain, int type, int protocol) U 
 Creates an endpoint for communication in the domain specified by domain, of type specified by type */ 
PHP_FUNCTION(socket_create) 
{ 
  long   arg1, arg2, arg3; 
  php_socket  *php_sock = (php_socket*)emalloc(sizeof(php_socket)); 
 
  if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "lll", &arg1, &arg2, &arg3) == FAILURE) { 
    efree(php_sock); 
    return; 
  } 
 
  if (arg1 != AF_UNIX 
#if HAVE_IPV6 
    && arg1 != AF_INET6 
#endif 
    && arg1 != AF_INET) { 
    php_error_docref(NULL TSRMLS_CC, E_WARNING, "invalid socket domain [%ld] specified for argument 1, assuming AF_INET", arg1); 
    arg1 = AF_INET; 
  } 
 
  if (arg2 > 10) { 
    php_error_docref(NULL TSRMLS_CC, E_WARNING, "invalid socket type [%ld] specified for argument 2, assuming SOCK_STREAM", arg2); 
    arg2 = SOCK_STREAM; 
  } 
 
  php_sock->bsd_socket = socket(arg1, arg2, arg3); 
  php_sock->type = arg1; 
 
  if (IS_INVALID_SOCKET(php_sock)) { 
    SOCKETS_G(last_error) = errno; 
    php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unable to create socket [%d]: %s", errno, php_strerror(errno TSRMLS_CC)); 
    efree(php_sock); 
    RETURN_FALSE; 
  } 
 
  php_sock->error = 0; 
  php_sock->blocking = 1; 
                                   1257,1-8  61% 
  ZEND_REGISTER_RESOURCE(return_value, php_sock, le_socket); 
} 

//初始化Socket  
 if( (socket_fd = socket(AF_INET, SOCK_STREAM, 0)) == -1 ){ 
   printf("create socket error: %s(errno: %d)\n",strerror(errno),errno); 
   exit(0); 
 }

/** 
 * 
 * @param $data= array=array('key'=>value) 
 */ 
function post_contents($data = array()) { 
 $post = $data ? http_build_query($data) : ''; 
 $header = "POST /test/ HTTP/1.1" . "\n"; 
 $header .= "User-Agent: Mozilla/4.0+(compatible;+MSIE+6.0;+Windows+NT+5.1;+SV1)" . "\n"; 
 $header .= "Host: localhost" . "\n"; 
 $header .= "Accept: */*" . "\n"; 
 $header .= "Referer: http://localhost/test/" . "\n"; 
 $header .= "Content-Length: ". strlen($post) . "\n"; 
 $header .= "Content-Type: application/x-www-form-urlencoded" . "\n"; 
 $header .= "\r\n"; 
 $ddd = $header . $post; 
 $fp = stream_socket_client("tcp://localhost:80", $errno, $errstr, 30); 
 $response = ''; 
 if (!$fp) { 
  echo "$errstr ($errno)<br />\n"; 
 } else { 
  fwrite($fp, $ddd); 
  $i = 1; 
  while ( !feof($fp) ) { 
   $r = fgets($fp, 1024); 
   $response .= $r; 
   //处理这一行 
  } 
 } 
 fclose($fp); 
 return $response; 
} 

while ( !feof($fp) ) { 
 $r = fgets($fp, 1024); 
 $response .= $r; 
} 

$fp = fopen("myfile.txt", "r"); 
while (!feof($fp)) { 
 $current_line = fgets($fp); 
 //对结果做进一步处理,防止进入死循环 
}