<?php

set_time_limit(5);

$i = 0;

ob_start();

function shutdown () {
  $out = ob_get_clean();
  echo "out: '$out'"; 
}

register_shutdown_function('shutdown');

echo ini_get('max_execution_time');

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

?>

Timeout