Fastest way to determine where PHP script exits

Question

Say you have a large PHP project and suddenly, when attempting to run it, you just end up with a blank page. The script terminates and you want to find exactly where that is

Answer 1

I use the following code and need no special debugging environment. Note that this might take really long; you can set the ticks count higher - that makes it faster, but blurry.

function shutdown_find_exit()
{
    var_dump($GLOBALS['dbg_stack']);
}
register_shutdown_function('shutdown_find_exit');
function write_dbg_stack()
{
    $GLOBALS['dbg_stack'] = debug_backtrace();
}
register_tick_function('write_dbg_stack');
declare(ticks=1);