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                ??碼云GVP開源項目 12k star Uniapp+ElementUI 功能強大 支持多語言、二開方便! 廣告
                # Client `swoole_client`提供了`tcp/udp socket`的客戶端的封裝代碼,使用時僅需 `new swoole_client` 即可。 `swoole`的`socket client`對比PHP提供的`stream`族函數有哪些好處: * `stream`函數存在超時設置的陷阱和`Bug`,一旦沒處理好會導致`Server`端長時間阻塞 * `fread`有8192長度限制,無法支持`UDP`的大包 * `swoole_client`支持`waitall`,在有確定包長度時可一次取完,不必循環讀取 * `swoole_client`支持`UDP connect`,解決了`UDP`串包問題 * `swoole_client`是純C的代碼,專門處理socket,`stream`函數非常復雜。`swoole_client`性能更好 除了普通的同步阻塞+`select`的使用方法外,`swoole_client`還支持異步非阻塞回調。 同步阻塞客戶端 ----- ```php $client = new swoole_client(SWOOLE_SOCK_TCP); if (!$client->connect('127.0.0.1', 9501, -1)) { exit("connect failed. Error: {$client->errCode}\n"); } $client->send("hello world\n"); echo $client->recv(); $client->close(); ``` > php-fpm/apache環境下只能使用同步客戶端 > apache環境下僅支持`prefork`多進程模式,不支持`prework`多線程 異步非阻塞客戶端 ---- ```php $client = new swoole_client(SWOOLE_SOCK_TCP, SWOOLE_SOCK_ASYNC); $client->on("connect", function(swoole_client $cli) { $cli->send("GET / HTTP/1.1\r\n\r\n"); }); $client->on("receive", function(swoole_client $cli, $data){ echo "Receive: $data"; $cli->send(str_repeat('A', 100)."\n"); sleep(1); }); $client->on("error", function(swoole_client $cli){ echo "error\n"; }); $client->on("close", function(swoole_client $cli){ echo "Connection close\n"; }); $client->connect('127.0.0.1', 9501); ``` > 異步客戶端只能使用在`cli`命令行環境
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