debug_backtrace() from registered shutdown function in PHP

Question

While tinkering for an answer to this question, I found that debug_backtrace() doesn\'t trace beyond the function registered to register_shutdown_function

Answer 1

This is a very expensive solution. I never used register_tick_function() or tick and I'm not sure if it works as expected.

declare(ticks=1);

function tick_handler() {
    global $backtrace;
    $backtrace = debug_backtrace();
}
register_tick_function('tick_handler');



function shutdown() {
    global $backtrace;
    // do check if $backtrace contains a fatal error...
    var_dump($backtrace);
}
register_shutdown_function('shutdown');