PHP Socket Server

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if (php_sapi_name() != 'cli') {
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exit("run cli");
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}
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# php.ini 里 error_reporting 设置要么生要么死
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# while(true) 太凶猛了，写日志会占用高的IO
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//ini_set('error_reporting', E_ERROR);
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//ini_set('display_errors', 0);
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set_time_limit(0);
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# 记录文件
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$recvfile = './recv.txt';
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# 心跳标记
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$heartag = "\r\n";
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# 数组长度
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$datalen = 1024 * 1024;
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$ip = '192.168.125.233';
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$port = 12345;
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# IPv4, 流, TCP
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$sockect = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
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# 绑定服务端必须的
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if (!socket_bind($sockect, $ip, $port)) {
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exit("socket bind fail\n");
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}
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# 监听
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socket_listen($sockect);
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# 不阻塞
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socket_set_nonblock($sockect);
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$clients = array();
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while (true) {
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# 接收客户端连接
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$client = socket_accept($sockect);
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if (is_resource($client)) {
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# 触发心跳
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socket_write($client, $heartag, strlen($heartag));
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$clients[] = $client;
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printf("client index:%d\n", count($clients));
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}
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unset($client);
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if (!empty($clients)) {
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foreach ($clients AS $idx => &$client) {
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if (is_resource($client)) {
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$recvstr = '';
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# 接收客户端数据 注意：第四个参数必须为零，这跟手册上不一样，还没搞明白
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if (socket_recv($client, $recvstr, $datalen, 0) === 0) {
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socket_close($client);
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socket_shutdown($client);
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unset($clients[$idx]);
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continue;
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}
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if ($recvstr == $heartag) {
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# 触发心跳
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socket_write($client, $heartag, strlen($heartag));
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} elseif (trim($recvstr) != "") {
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# 输出接收的消息
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$stdmsg = sprintf("%d:%s\n", $idx, $recvstr);
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file_put_contents($recvfile, $stdmsg, FILE_APPEND);
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echo $stdmsg;
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}
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}
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unset($recvstr, $idx);
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}
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}
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# 要睡多久？这是个问题,不睡 CPU 很累, 内存吃的厉害
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usleep(50000);
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}
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socket_close($sockect);
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socket_shutdown($sockect);
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?>
作者：oodbqpoo