How can an external PHP script be called and parsed from another PHP script without using HTML form-action calls?

To call and parse an external PHP script from another PHP script without using HTML form-action calls, you can use the PHP `file_get_contents()` function to fetch the output of the external script and then use `eval()` to execute the fetched code within the calling script.

// Call and parse an external PHP script without using HTML form-action calls
$externalScript = 'http://www.example.com/external-script.php';
$externalCode = file_get_contents($externalScript);

// Execute the fetched code within the calling script
eval($externalCode);