obtest.php

<?php

function do_not_change_this_function() {

    echo "Something is happening\n";
    echo "this is important data\n";

    ob_flush();

    echo "Here is some more data\n";

}

echo "running the program...\n";

ob_start();
ob_start();

do_not_change_this_function();

$output = ob_get_clean();

echo "Program is done, this is its output, let's put it in the database. All lines here and above are lost!\n";

echo $output;