A script to test stream_socket_client()

socket_test.php

<?php
// Usage: php socket_test.php [number_of_connections] [timeout]
ini_set('display_errors', 'On');
ini_set('error_reporting', 'E_ALL');
$n = (int)($argv[1] ?? 100);
$timeout = (float)($argv[2] ?? 0.5);

(new StreamSocketTest())->run($n, $timeout);

class StreamSocketTest
{
    /** @var int */
    private $errorCount = 0;

    public function run(int $n, float $timeout): void
    {
        $this->errorCount = 0;
        $time = microtime(true);
        for ($i = 0; $i < $n; $i ++) {
            $this->runOnce($timeout);
            sleep(0.3);
        }
        $elapsedTime = microtime(true) - $time;
        echo "Tested {$n} connections(timeout={$timeout}) in {$elapsedTime}s with {$this->errorCount} errors\n";
    }

    private function runOnce(float $timeout): void
    {
        $time = microtime(true);
        $socket = stream_socket_client("tlsv1.2://www.google.com:443", $errno, $errstr, $timeout, STREAM_CLIENT_CONNECT);
        $elaspedTime = microtime(true) - $time;
        if (is_resource($socket)) {
            echo "connected in {$elaspedTime}s\n";
            fclose($socket);
        } else {
            $this->errorCount ++;
            echo "failed in {$elaspedTime}s, error.no={$errno}, errstr={$errstr}\n";
        }
    }
}