Added command line argument for socket communication

bin/php-language-server.php

@@ -12,6 +12,21 @@ foreach ([__DIR__ . '/../../../autoload.php', __DIR__ . '/../autoload.php', __DI
     }
 }
 
-$server = new LanguageServer(new ProtocolStreamReader(STDIN), new ProtocolStreamWriter(STDOUT));
+if (count($argv) >= 3 && $argv[1] == '--tcp') {
+    $address = $argv[2];
+    $socket = stream_socket_client('tcp://' . $address, $errno, $errstr);
+    if ($socket === false) {
+        fwrite(STDERR, "Could not connect to language client. Error $errno\n");
+        fwrite(STDERR, "$errstr\n");
+        exit(1);
+    }
+    $inputStream = $outputStream = $socket;
+}
+else {
+    $inputStream = STDIN;
+    $outputStream = STDOUT;
+}
+
+$server = new LanguageServer(new ProtocolStreamReader($inputStream), new ProtocolStreamWriter($outputStream));
 
 Loop\run();