Question

I see that file_put_contents function is returning FALSE but is it possible to know the error (errno) returned from the system call from Linux kernel?

There could be many reasons for failure (which could even be device or driver dependent). So I want to know the exact error reason.

file_put_contents simply returns FALSE on failure.

What I want would be equivalent to C errno or the perror C function.

Answer 1

The results can be kind of ambiguous, but the closest equivalent to errno in PHP is the error_get_last function.