Are there any specific PHP functions or libraries that are recommended for automating website submission tasks like this?

To automate website submission tasks in PHP, you can use cURL library. cURL is a PHP library that allows you to make HTTP requests and handle responses, making it ideal for automating tasks like submitting forms or interacting with websites programmatically.

// Initialize cURL session
$ch = curl_init();

// Set cURL options
curl_setopt($ch, CURLOPT_URL, 'http://example.com/form-submit.php');
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query(array('field1' => 'value1', 'field2' => 'value2')));

// Execute cURL session
$response = curl_exec($ch);

// Close cURL session
curl_close($ch);

// Handle response
echo $response;