PHP socket connects to server template, socket server

PHP’s socket is connected to the server template, and the socket server

When sorting out the new framework, I found that some cached data requires external interface access, which is more convenient It is the interface of php, so I temporarily studied how php connects to the java server.

Paste the code first:

<?php
require_once 'CRC16.php';
/*-----------------------------
 | 向服务器发送数据包
 ------------------------------*/
classServer{
//发送数据包
publicstaticfunction sendPacket($packet, $host, $port){
 $protocol ='tcp';
 $get_prot = getprotobyname ( $protocol );
//创建socket
 $socket = socket_create ( AF_INET, SOCK_STREAM, $get_prot );
//建立连接
 $conn = socket_connect ( $socket, $host, $port );
if(!$conn){
 socket_close($socket);
exit("socket connect failed!");
}
 $buffer =@socket_read($socket,9, PHP_NORMAL_READ); $buffer
= $crcCode =(ord($buffer[7])<<8)+ord($buffer[8]);@socket_read
( $len = strlen($packet);$socket
, $newpacket = CRC16::encode($packet, $crcCode,4);9
, socket_send ( $socket, $newpacket, $len,0); PHP_NORMAL_READ
);//等待接受
 $head =@socket_read($socket,4,PHP_NORMAL_READ);

$crcCode

<span class="pln"> $len </span><span class="pun">=</span><span class="pun">(</span><span class="pln">ord</span><span class="pun">(</span><span class="pln">$head</span><span class="pun">[</span><span class="lit">0</span><span class="pun">])<<</span><span class="lit">24</span><span class="pun">)+(</span><span class="pln">ord</span><span class="pun">(</span><span class="pln">$head</span><span class="pun">[</span><span class="lit">1</span><span class="pun">])<<</span><span class="lit">16</span><span class="pun">)+(</span><span class="pln">ord</span><span class="pun">(</span><span class="pln">$head</span><span class="pun">[</span><span class="lit">2</span><span class="pun">])<<</span><span class="lit">8</span><span class="pun">)+</span><span class="pln">ord</span><span class="pun">(</span><span class="pln">$head</span><span class="pun">[</span><span class="lit">3</span><span class="pun">]);</span>

(

<span class="pln"> $content </span><span class="pun">=</span><span class="lit">@socket_read</span><span class="pun">(</span><span class="pln">$socket</span><span class="pun">,</span><span class="pln">$len</span><span class="pun">-</span><span class="lit">4</span><span class="pun">,</span><span class="pln">PHP_NORMAL_READ</span><span class="pun">);</span>

ord

(

<span class="pln"> socket_close </span><span class="pun">(</span><span class="pln"> $socket </span><span class="pun">);</span>

$buffer

[

<span class="kwd">return</span><span class="pln"> substr</span><span class="pun">(</span><span class="pln">$content</span><span class="pun">,</span><span class="lit">3</span><span class="pun">);</span>

])<<

<span class="lit">8<span class="pun">)+<span class="pln">ord(<span class="pln">$buffer[<span class="lit">8]);
<span class="pln"> $len =<span class="pln"> strlen(<span class="pln">$packet);
<span class="pln"> $newpacket =<span class="pln"> CRC16::<span class="pln">encode(<span class="pln">$packet,<span class="pln"> $crcCode,<span class="lit">4);
<span class="pln"> socket_send (<span class="pln"> $socket,<span class="pln"> $newpacket,<span class="pln"> $len,<span class="lit">0);
<span class="com">//等待接受
<span class="pln"> $head =<span class="lit">@socket_read(<span class="pln">$socket,<span class="lit">4,<span class="pln">PHP_NORMAL_READ);
<span class="pln"> $len =(<span class="pln">ord(<span class="pln">$head[<span class="lit">0])<<<span class="lit">24)+(<span class="pln">ord(<span class="pln">$head[<span class="lit">1])<<<span class="lit">16)+(<span class="pln">ord(<span class="pln">$head[<span class="lit">2])<<<span class="lit">8)+<span class="pln">ord(<span class="pln">$head[<span class="lit">3]);
<span class="pln"> $content =<span class="lit">@socket_read(<span class="pln">$socket,<span class="pln">$len-<span class="lit">4,<span class="pln">PHP_NORMAL_READ);
<span class="pln"> socket_close (<span class="pln"> $socket );
<span class="kwd">return<span class="pln"> substr(<span class="pln">$content,<span class="lit">3);
}</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>

<span class="kwd">public</span><span class="kwd">static</span><span class="kwd">function</span><span class="pln"> packet</span><span class="pun">(</span><span class="pln">$group</span><span class="pun">,</span><span class="pln">$cmd</span><span class="pun">,</span><span class="pln">$message</span><span class="pun">){</span>

public

static

<span class="pln"> $size </span><span class="pun">=</span><span class="pln"> strlen</span><span class="pun">(</span><span class="pln">$message</span><span class="pun">)+</span><span class="lit">8</span><span class="pun">;</span>

function

packet

 $str ='';(

$group

<span class="pln"> $str </span><span class="pun">.=</span><span class="kwd">self</span><span class="pun">::</span><span class="pln">writeInt</span><span class="pun">(</span><span class="pln">$size</span><span class="pun">);</span>

$cmd

<span class="pln"> $str </span><span class="pun">.=</span><span class="kwd">self</span><span class="pun">::</span><span class="pln">writeByte</span><span class="pun">(</span><span class="lit">0</span><span class="pun">);</span>

$message

<span class="pln"> $str </span><span class="pun">.=</span><span class="kwd">self</span><span class="pun">::</span><span class="pln">writeByte</span><span class="pun">(</span><span class="pln">$group</span><span class="pun">);</span>

){

<span class="pln"> $str </span><span class="pun">.=</span><span class="kwd">self</span><span class="pun">::</span><span class="pln">writeByte</span><span class="pun">(</span><span class="pln">$cmd</span><span class="pun">);</span>

$size

<span class="pln"> $str </span><span class="pun">.=</span><span class="kwd">self</span><span class="pun">::</span><span class="pln">writeByte</span><span class="pun">(</span><span class="lit">1</span><span class="pun">);</span>

strlen $str .= $message;

(

$messagereturn $str;

8}

;

//写进2个byte的数据 $str

<span class="kwd">private</span><span class="kwd">static</span><span class="kwd">function</span><span class="pln"> writeShort</span><span class="pun">(</span><span class="pln">$s</span><span class="pun">)</span><span class="pun">{</span>

;

<span class="kwd">return</span><span class="pln"> pack </span><span class="pun">(</span><span class="str">"n"</span><span class="pun">,</span><span class="pln"> $s </span><span class="pun">);</span>

}

$str

//写进4个byte的数据.=

self

<span class="kwd">private</span><span class="kwd">static</span><span class="kwd">function</span><span class="pln"> writeInt</span><span class="pun">(</span><span class="pln">$N</span><span class="pun">)</span><span class="pun">{</span>

writeInt

<span class="kwd">return</span><span class="pln"> pack </span><span class="pun">(</span><span class="str">"N"</span><span class="pun">,</span><span class="pln"> $N </span><span class="pun">);</span>

(

$size

});

//写进1个byte的数据

$str

<span class="kwd">private</span><span class="kwd">static</span><span class="kwd">function</span><span class="pln"> writeByte</span><span class="pun">(</span><span class="pln">$b</span><span class="pun">)</span><span class="pun">{</span>

self

<span class="kwd">return</span><span class="pln"> pack </span><span class="pun">(</span><span class="str">"c"</span><span class="pun">,</span><span class="pln"> $b </span><span class="pun">);</span>

writeByte

<span class="pun">(<span class="lit">0);
<span class="pln"> $str .=<span class="kwd">self::<span class="pln">writeByte(<span class="pln">$group);
<span class="pln"> $str .=<span class="kwd">self::<span class="pln">writeByte(<span class="pln">$cmd);
<span class="pln"> $str .=<span class="kwd">self::<span class="pln">writeByte(<span class="lit">1);
<span class="pln"> $str .=<span class="pln"> $message;
<span class="kwd">return<span class="pln"> $str;
}

<span class="com">//写进2个byte的数据
<span class="kwd">private<span class="kwd">static<span class="kwd">function<span class="pln"> writeShort(<span class="pln">$s){
<span class="kwd">return<span class="pln"> pack (<span class="str">"n",<span class="pln"> $s );
}
<span class="com">//写进4个byte的数据
<span class="kwd">private<span class="kwd">static<span class="kwd">function<span class="pln"> writeInt(<span class="pln">$N){
<span class="kwd">return<span class="pln"> pack (<span class="str">"N",<span class="pln"> $N );
}
<span class="com">//写进1个byte的数据
<span class="kwd">private<span class="kwd">static<span class="kwd">function<span class="pln"> writeByte(<span class="pln">$b){
<span class="kwd">return<span class="pln"> pack (<span class="str">"c",<span class="pln"> $b );
}</span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span></span>

}}

Because after the personal server is connected, a crcCode verification code will be assigned, and the sent message needs to be encrypted by crc16 (actually very simple, keep it mysterious), so first wait for the fixed length to be accepted to obtain the crcCode, and then send the request. Wait for the packet to be accepted and return.

From Wiz Notes (Wiz)

How does PHP's Socket communicate with each other between the server and the client?

The server provides a data buffer and provides a user identification mechanism. This is used to send corresponding information to both chat users.
What seems like user-to-user communication is actually the user communicating with the server.
My little understanding

php socket cannot connect

Check the port

PHP socket connects to server template, socket server_PHP tutorial

PHP’s socket is connected to the server template, and the socket server