[Phpwm] strtotime() date format

[Greg Jones]

As long as you're not on windows, you can use strptime to parse a date
for a given format, which you could reformat as something acceptable
to strtotime. The way it parses is a little odd though (zero-indexed
months, years since 1900)  and the formatting isn't that used by
date(), so if your date-format is always going to be d/m/(y|Y) it's
probably just easier to re-order it with string functions.

Greg