How can PHP developers effectively troubleshoot issues related to telnet communication in their scripts?

When troubleshooting telnet communication issues in PHP scripts, developers can use the `fsockopen()` function to establish a connection to the telnet server and then send commands using `fwrite()`. By checking the response from the server using `fgets()`, developers can identify any errors or issues with the communication. 

$server = 'telnet.example.com';
$port = 23;

$socket = fsockopen($server, $port, $errno, $errstr, 10);

if (!$socket) {
    echo "Error: $errstr ($errno)\n";
} else {
    fwrite($socket, "command to send\r\n");
    
    while (!feof($socket)) {
        echo fgets($socket, 1024);
    }
    
    fclose($socket);
}

Keywords

PHP telnet communication troubleshooting scripts

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