Debugger::$disableHandlers, Pjax support

[kakserpom]

• bug fix / new feature? feature
• BC break? no

1. $disableHandlers allows to disable register_shutdown_handlers() and set_exception_handler() and use your own handlers.

2. Pjax support (https://github.com/defunkt/jquery-pjax). We treat Pjax requests not like regular Ajax requests.

[milo]

ad 1) When you disable Tracy's handlers, what is the purpose of Tracy then? You don't need it enabled after all.

ad 2) It is non systematic solution. You can detect HTTP_X_PJAX header in bootstrap and disable Tracy or its bar.

[kakserpom]

1. I have my own handlers, but I need Tracy enabled. My own handlers can call Debugger::exceptionHandler($exception, false). Btw, Debugger::exceptionHandler has two arguments and the callback of set_exception_handler() has only one.

2. I don't want to disable Tracy, I want to get HTML output for Pjax requests, but they are treated like regular Ajax requests by default.

[adrianbj]

The concept/need behind this seems somewhat similar to this: #279

I still have to modify the Tracy core on each update to include those changes. I think it wouldn't bet great to have some flexibility to override various handlers.

[milo]

I have my own handlers, but I need Tracy enabled. My own handlers can call Debugger::exceptionHandler($exception, false). Btw, Debugger::exceptionHandler has two arguments and the callback of set_exception_handler() has only one.

You can overload exception handler after Tracy is enabled.

Tracy\Debugger::enable(...);
$prev = null;
$prev = set_exception_handler(function (...) use (&$prev) {
    ...
    if ($prev) $prev(...func_get_args());
});

and the same for error handler:

set_error_handler(function (...) {
   ...
   return false;  # Call previous one
});

I just want to say, that PHP has already API for it.

I don't want to disable Tracy, I want to get HTML output for Pjax requests, but they are treated like regular Ajax requests by default.

So why the requests looks like AJAX when they are not? Isn't Pjax library issue? You can always modify $_SERVER content to mimic the situation.