PHP - fsockopen function 超时不起作用

Question

I have recently started timing the connection to the server. Surprisingly, some calls take even 10-20 seconds, even though my timeout is set to 1 second. What am I doing wrong?

$this->startTime = microtime(true); 

// Open connection
$socket = @fsockopen($this->host, $this->port, $errno, $errstr, 1);
if (!$socket) {
    return false;
}

$this->endTime = microtime(true);
$this->time = ($this->endTime- $this->startTime);

@EDIT

$connectionTimeStart = microtime(true); 

        // Open connection
        $socket = @fsockopen($this->host, $this->port, $errno, $errstr, 1);

        $connectionTimeEnd = microtime(true);
        $this->connectionTime = ($connectionTimeEnd - $connectionTimeStart);

        if (!$socket) {
            return false;
        }

        $streamTimeStart = microtime(true); 

        // Get server info
        fwrite(MY FWRITE CODE);
        stream_set_timeout($socket, 1);
        $response = stream_get_contents($socket);

        $streamTimeEnd = microtime(true);
        $this->streamTime = ($streamTimeEnd - $streamTimeStart);

        $info = stream_get_meta_data($socket);
        fclose($socket);

        if ($info['timed_out']) {
            $this->timeout = true;
            return false;
        }

Answer 1

If you read docs for fsockopen() :

https://www.php.net/manual/en/function.fsockopen.php

It says, this timeout parameter only applies while connecting to a socket, but receiving data can be longer.

Use stream_set_timeout() function too

https://www.php.net/manual/en/function.stream-set-timeout.php

PHP docs is quite clear, just take time to read it when you use a function to know what you can do and what you can't.