Read echo'ed output from another PHP file
You can use PHP's output buffering to accomplish this:
ob_start(); // begin collecting outputinclude 'myfile.php';$result = ob_get_clean(); // retrieve output from myfile.php, stop buffering$result will then contain the text.
You can't include a PHP script that is on an external website/server into your local script - unless you enable allow_url_include on your php.ini (if you have access to it)
Instead, you can let that website/server render the page and get the resulting HTML output on your local script by doing this:
$result = file_get_contents('http://127.0.0.1/myfile.php');