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这里介绍了判断PHP数组为空的5种方法,未初始化的变量也能被empty检测为

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socket服务器的干活章程是如此的,不间断地运营以等待客商端的连续几日。一旦客商端连接上了,服务器就能够将它增多到客户名单中,然后起始等候来自顾客端的新闻。

本节内容:

想要创设闲话应用,可能以致是游戏吗?那么,socket服务器将产生您迈出的率先步。一旦你通晓了创击溃务器的底蕴能,那么继续的优化步骤就能变得雷同轻便。

永不走开,上面是完好的源代码:

  1、socket

socket服务器的专门的学业章程是如此的,不间断地运维以等待客商端的连接。一旦客商端连接上了,服务器就能够将它增添到客商名单中,然后开头等候来自顾客端的音信。

// Set time limit to indefinite execution set_time_limit (0); // Set the ip and port we will listen on $address = 'localhost'; $port = 10000; $max_clients = 10; // Array that will hold client information $client = Array(); // Create a TCP Stream socket $sock = socket_create(AF_INET, SOCK_STREAM, 0); // Bind the socket to an address/port socket_bind($sock, $address, $port) or die('Could not bind to address'); // Start listening for connections socket_listen($sock); echo "Waiting for connections.../r/n"; // Loop continuously while (true) { // Setup clients listen socket for reading $read[0] = $sock; for ($i = 0; $i  $max_clients; $i++) { if (isset($client[$i]['sock'])) $read[$i + 1] = $client[$i]['sock']; } // Set up a blocking call to socket_select() if (socket_select($read, $write = NULL, $except = NULL, $tv_sec = 5)  1) continue; /* if a new connection is being made add it to the client array */ if (in_array($sock, $read)) { for ($i = 0; $i  $max_clients; $i++) { if (empty($client[$i]['sock'])) { $client[$i]['sock'] = socket_accept($sock); echo "New client connected $i/r/n"; break; } elseif ($i == $max_clients - 1) echo "Too many clients.../r/n"; } } // end if in_array // If a client is trying to write - handle it now for ($i = 0; $i  $max_clients; $i++) { // for each client if (isset($client[$i]['sock'])) { if (in_array($client[$i]['sock'], $read)) { $input = socket_read($client[$i]['sock'], 1024); if ($input == null) { echo "Client disconnecting $i/r/n"; // Zero length string meaning disconnected unset($client[$i]); } else { echo "New input received $i/r/n"; // send it to the other clients for ($j = 0; $j  $max_clients; $j++) { if (isset($client[$j]['sock']) && $j != $i) { echo "Writing '$input' to client $j/r/n"; socket_write($client[$j]['sock'], $input, strlen($input)); } } if ($input == 'exit') { // requested disconnect socket_close($client[$i]['sock']); } } } else { echo "Client disconnected $i/r/n"; // Close the socket socket_close($client[$i]['sock']); unset($client[$i]); } } } } // end while // Close the master sockets socket_close($sock); 

  2、IO多路复用

图片 1

嘿哎,乍一看那有如是叁个大工程,可是我们能够先将它表明为多少个很小的局部。

  3、socketserver

无须走开,上面是完全的源代码:

率先某些是开创服务器。Lines:2至20。

 

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