Is debug_backtrace() safe for serious usage in production environment?

Question

It\'s functionality is so strong that I worry about its stability and performance.

What do you think?

UPDATE

What I\'m doing is this:

Answer 1

debug_backtrace is relatively expensive in my experience, so you should be careful it is not used in loops (e.g. in a custom error handler that catches warnings or notices and performs a backtrace every time).

For any kind of error logging, I think it's pretty invaluable, and because it's going to be called only once, definitely not a performance problem. It is surely always good to include a backtrace in an error report.

I can't see why there would be any specific issues with this function's stability (i.e. calling it causing another crash), I've never heard of any problems. The only "gotcha" I can see is this note in the User Contributed Notes when using objects as function parameters that have no _toString method defined.

Of course, you should never output the results of a backtrace to the end user - that goes without saying.

Answer 2

Well, considering its name, I'm not sure I would use it as a "normal" part of my application -- even though I don't remember having read anything which said that it was either good nor bad.

I don't really know what you mean about "serious usage", but :

• If you need that function for your application to work, it migh indicate some problem in your design
• This function can be useful in an error-handler, when you want to log how/where an error happened : it will make the log files more useful, when it comes to tracking down the sources of errors

Though, not sure that "error logging" corresponds to your definition of serious usage ?

Answer 3

Ok, from my understanding, the problem is following

You've got a php file, let's call it "main.php". In "main.php" you're including "A.php" from some directory:

# in "main.php"
include '/some/dir/A.php';

A.php, in turn, includes 'B.php', which is in the same directory as A.php

# in "A.php"
include 'B.php'; 

the problem: since "/some/dir/" (where A and B reside) is not the current for "main.php", php does not see B.php from A.php

the solution: in A.php use an absolute full path to /some/dir. Either hardcode it or obtain it dynamically via dirname(__FILE__)

# in "A.php"
include dirname(__FILE__) .'/B.php';