Can you recommend any resources, such as books or websites, for further learning about using fsockopen and automating form submissions in PHP?

To learn more about using fsockopen and automating form submissions in PHP, you can refer to the following resources: 1. "PHP and MySQL Web Development" by Luke Welling and Laura Thomson - This book covers various PHP topics, including using fsockopen for network communication and automating form submissions. 2. PHP.net documentation on fsockopen - The official PHP documentation provides detailed information on how to use fsockopen for creating network connections. 3. W3Schools PHP Form Handling tutorial - This online resource offers practical examples and explanations on how to automate form submissions using PHP. Code snippet:

<?php
$fp = fsockopen("www.example.com", 80, $errno, $errstr, 30);
if (!$fp) {
    echo "$errstr ($errno)<br />\n";
} else {
    $out = "POST /submit_form.php HTTP/1.1\r\n";
    $out .= "Host: www.example.com\r\n";
    $out .= "Content-Type: application/x-www-form-urlencoded\r\n";
    $out .= "Content-Length: " . strlen($data) . "\r\n";
    $out .= "Connection: Close\r\n\r\n";
    $out .= $data;
    fwrite($fp, $out);
    while (!feof($fp)) {
        echo fgets($fp, 128);
    }
    fclose($fp);
}
?>