Hi internals,
I've created a new RFC https://wiki.php.net/rfc/debug_backtrace_depth to return
the depth of the current stack trace.
Inspecting the current stack trace depth is occasionally useful for
1. Manually debugging with temporary debug statements
2. Checking for potential infinite recursion or investigating reproducible
reports of infinite recursion
3. Checking if code is likely to hit stack frame limits when run in
environments using extensions such as Xdebug
(https://xdebug.org/docs/all_settings#max_nesting_level , which also checks
for potential infinite recursion)
(note that Xdebug is a debugger - running php under xdebug is significantly
slower than without Xdebug)
It is currently possible to compute the depth through
`count(debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, $limit=0))`,
but this is verbose, inefficient, and harder to read compared to returning the
depth directly.
Thoughts?
Thanks,
- Tyson
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