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 "OKnBinding the socket on $address:$port ... ";
echo "OKnNow 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 socketn"); // 创建一个Socket
 
$connection = socket_connect($socket, $host, $port) or die("Could not connet servern"); // 连接
socket_write($socket, "hello socket") or die("Write failedn"); // 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 .= "rn";
$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
}