├── echo-server
    ├── multi-process-blocking.php
    ├── multi-process-prefork-blocking.php
    ├── single-process-blocking-iomultiplex.php
    ├── single-process-blocking.php
    └── single-process-nonblocking.php
└── images
    ├── macro_001.png
    ├── macro_002.png
    ├── sample_index.png
    ├── vscode_01.png
    ├── vscode_02.png
    ├── vscode_03.png
    ├── vscode_04.png
    ├── vscode_05.png
    ├── vscode_06.png
    ├── vscode_07.png
    ├── vscode_08.png
    ├── vscode_09.png
    └── vscode_10.png


/echo-server/multi-process-blocking.php:
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 1 | <?php
 2 | //TCP Socket を作成
 3 | $sock = socket_create(AF_INET, SOCK_STREAM, getprotobyname('tcp'));
 4 | //TIME_WAIT時にアドレス・ポートの使い回しが出来るようにセット
 5 | socket_set_option($sock, SOL_SOCKET, SO_REUSEADDR, 1);
 6 | 
 7 | //Socket に SRC Address, Port を bind して listen
 8 | if(!socket_bind($sock, '127.0.0.1', 8080) || !socket_listen($sock, 0)){
 9 |     die("port in use\n");
10 | }
11 | while(true){
12 |     $client_sock = socket_accept($sock); //親プロセスはここでblockして接続を待つ
13 |     $pid = pcntl_fork();
14 |     if($pid === 0){ //子プロセス
15 |         echo "connected\n";
16 |         //client からの文字入力を待つ (block)
17 |         $buf = socket_read($client_sock, 1024);
18 |         socket_write($client_sock, $buf);
19 |         socket_close($client_sock);
20 |         socket_close($sock);
21 |         echo "close connection\n";
22 |         exit(0);
23 |     }else{ //親プロセス
24 |         //参照が残っていると、子側のsocket_closeが効かなくなることへの対処
25 |         unset($client_sock);
26 |     }
27 | }
28 | 


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/echo-server/multi-process-prefork-blocking.php:
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 1 | <?php
 2 | //TCP Socket を作成
 3 | $sock = socket_create(AF_INET, SOCK_STREAM, getprotobyname('tcp'));
 4 | //TIME_WAIT時にアドレス・ポートの使い回しが出来るようにセット
 5 | socket_set_option($sock, SOL_SOCKET, SO_REUSEADDR, 1);
 6 | 
 7 | //Socket に SRC Address, Port を bind して listen
 8 | if(!socket_bind($sock, '127.0.0.1', 8080) || !socket_listen($sock, 0)){
 9 |     die("port in use\n");
10 | }
11 | 
12 | $pids = [];
13 | foreach(range(0,1) as $i){ //２つの子プロセスを作成する
14 |     $pid = pcntl_fork();
15 |     if($pid === 0){ //子プロセスの場合
16 |         while(true) {
17 |             $client_sock = socket_accept($sock);
18 |             $buf = socket_read($client_sock, 1024);
19 |             socket_write($client_sock, $buf);
20 |             socket_close($client_sock);
21 |         }
22 |     }else{
23 |         //親プロセスの場合は、pidを収集
24 |         $pids[] = $pid;
25 |     }
26 | }
27 | 
28 | foreach($pids as $pid){
29 |     //親側のプロセスは、子プロセスの状態を監視する（ここで処理はBlockする）
30 |     pcntl_waitpid($pid, $status);
31 | }
32 | 


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/echo-server/single-process-blocking-iomultiplex.php:
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 1 | <?php
 2 | /**
 3 |  * シングルプロセス、ブロッキングIO多重化のechoサーバー
 4 |  */
 5 | 
 6 | //TCP Socket を作成
 7 | $master_socket = socket_create(AF_INET, SOCK_STREAM, getprotobyname('tcp'));
 8 | //TIME_WAIT時にアドレス・ポートの使い回しが出来るようにセット
 9 | socket_set_option($master_socket, SOL_SOCKET, SO_REUSEADDR, 1);
10 | 
11 | //Socket に SRC Address, Port を bind して listen
12 | if (!socket_bind($master_socket, '127.0.0.1', 8080) || !socket_listen($master_socket, 0)) {
13 |     die("port in use\n");
14 | }
15 | 
16 | //全てのソケットを保持する配列
17 | $sockets = [$master_socket];
18 | 
19 | while (true) {
20 |     //select用にreadソケット配列を作成
21 |     $read = $sockets;
22 | 
23 |     $null = null; //write, except は今回は使わないのでnull、ここで完全にblockするのでsecondsもnull
24 |     socket_select($read, $null, $null, $null);
25 | 
26 |     // 変更が検知されたsocketに対してそれぞれ処理を行う。
27 |     foreach ($read as $socket) {
28 |         //master_socketへの要求の場合は通信用の子ソケットを作る
29 |         if($socket === $master_socket){
30 |             echo "connected\n";
31 |             $sockets[] = socket_accept($master_socket);
32 |         }else{
33 |             // 子ソケットの場合は、送信されてきた通信内容を読んで処理を行う。
34 |             $input = socket_read($socket, 1024);
35 |             if (trim($input) === 'quit') {
36 |                 $key = array_search($socket, $sockets);
37 |                 unset($sockets[$key]);
38 |                 socket_close($socket);
39 |             } else {
40 |                 // 相手が入力してきた文字列をそのまま返す
41 |                 socket_write($socket, $input);
42 |             }
43 |         }
44 |     }
45 | }


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/echo-server/single-process-blocking.php:
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 1 | <?php
 2 | /**
 3 |  * シングルプロセス、ブロッキングIOのechoサーバー
 4 |  */
 5 | 
 6 | //TCP Socket を作成
 7 | $sock = socket_create(AF_INET, SOCK_STREAM, getprotobyname('tcp'));
 8 | //TIME_WAIT時にアドレス・ポートの使い回しが出来るようにセット
 9 | socket_set_option($sock, SOL_SOCKET, SO_REUSEADDR, 1);
10 | 
11 | //Socket に SRC Address, Port を bind して listen
12 | if(!socket_bind($sock, '127.0.0.1', 8080) || !socket_listen($sock, 0)){
13 |     die("port in use\n");
14 | }
15 | while(true){
16 |     //client からの接続を待つ (block)
17 |     $client_sock = socket_accept($sock);
18 |     echo "connected\n";
19 |     //client からの文字入力を待つ (block)
20 |     $buf = socket_read($client_sock, 1024);
21 |     socket_write($client_sock, $buf);
22 |     socket_close($client_sock);
23 | }


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/echo-server/single-process-nonblocking.php:
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 1 | <?php
 2 | /**
 3 |  * シングルプロセス、NonブロッキングIOのechoサーバー
 4 |  */
 5 | 
 6 | //TCP Socket を作成
 7 | $sock = socket_create(AF_INET, SOCK_STREAM, getprotobyname('tcp'));
 8 | //TIME_WAIT時にアドレス・ポートの使い回しが出来るようにセット
 9 | socket_set_option($sock, SOL_SOCKET, SO_REUSEADDR, 1);
10 | socket_set_nonblock($sock);
11 | 
12 | //Socket に SRC Address, Port を bind して listen
13 | if (!socket_bind($sock, '127.0.0.1', 8080) || !socket_listen($sock, 0)) {
14 |     die("port in use\n");
15 | }
16 | 
17 | $sockets = [$sock];
18 | 
19 | while (true) {
20 |     //client からの接続を待つ (block)
21 | 
22 |     $unset_socket_keys = [];
23 |     foreach($sockets as $i => $socket){
24 | 
25 |         if($socket === $sock){
26 |             if($client_sock = socket_accept($sock)) {
27 |                 echo "connected\n";
28 |                 socket_set_nonblock($client_sock);
29 |                 $sockets[] = $client_sock;
30 |             }
31 |         }else{
32 |             $buf = socket_read($socket, 1024);
33 |             if($buf && strlen($buf) > 0){
34 |                 socket_write($socket, $buf);
35 |                 socket_close($socket);
36 |                 $unset_socket_keys[] = $i;
37 |             }
38 |         }
39 |     }
40 | 
41 |     foreach($unset_socket_keys as $key){
42 |         unset($sockets[$key]);
43 |     }
44 | }
45 | 


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/images/macro_001.png:
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https://raw.githubusercontent.com/hanhan1978/shadow-php/5e7f8accde665f6cacf41ddb9d9954737487b5c7/images/macro_001.png


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/images/macro_002.png:
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/images/sample_index.png:
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/images/vscode_01.png:
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