src/php/tests/interop/metrics_client.php

<?php
/*
 *
 * Copyright 2016, Google Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
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 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
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 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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$args = getopt('', ['metrics_server_address:', 'total_only::']);
$parts = explode(':', $args['metrics_server_address']);
$server_host = $parts[0];
$server_port = (count($parts) == 2) ? $parts[1] : '';

$socket = socket_create(AF_INET, SOCK_STREAM, 0);
if (@!socket_connect($socket, $server_host, $server_port)) {
  echo "Cannot connect to merics server...\n";
  exit(1);
}
socket_write($socket, 'qps');
while ($out = socket_read($socket, 1024)) {
  echo "$out\n";
}
socket_close($socket);