<?php

set_time_limit(1);

$i = 0;

ob_start();

function shutdown () {
  $out = ob_get_clean();
  echo "<div>out: <div style='color: blue;'>$out</div></div>";
}

register_shutdown_function('shutdown');

echo '<div>max_execution_limit: ' . ini_get('max_execution_time') . '</div>';

while ($i < 10000000000000000) {
    $i++;
}

?>