<?php

ignore_user_abort(false); // Do not ignore user abort
set_time_limit(0); // Allow script to run forever

/* sleep 10 seconds */
for($i = 0; $i < 10; ++$i)
{
    /* ignore_user_abort/connection_status won't work without these 3 instructions: */
    echo chr(0); // write something to the output buffer (a null character)
    ob_flush(); // send/clear the output buffer
    flush();

    sleep(1);
}

// This file won't be created when the connection is aborted.
file_put_contents('helloWorld', '');