Another example is touch(). It requires utime which I assume all
OS's have although I don't know. And if not I assume PHP might essentially say "No utime huh? Let's use mtime/atime/ctime instead and define HAVE_UTIME as true." Again, I don't know this topic of
utime so am only guessing here.
AFAIR utime() is not available on Windows (?)
Opinions of the proposed entity?:
<!ENTITY note.func.sysdep '<note><para>This function is system-dependent
and may not be available in your copy of PHP. Use
<function>function_exists</function> to be certain.</para></note>'>
This would confuse people IMHO. "System-dependant" might mean that it is OS specific (MacOS, Linux, Windows), or more fine graied, or ...?
Goba