https://bugzilla.wikimedia.org/show_bug.cgi?id=38185

--- Comment #10 from badon <[email protected]> ---
Markus says in comment #4 that some PHP distributions disable hashing support
by default. He mentioned FreeBSD is one of them does that, and that's what my
server is using. He also suggests that we could use md5() instead of hash() to
eliminate the problem, and ensure wider compatibility. I don't know why hash()
is disabled by default in some PHP distributions. I've never heard of this
problem for anything except SMW, but the PHP gurus seemed to be familiar with
it, and I assume they agree with Markus to just use MD5 instead. 

I did some researching about MD4 versus MD5, and I found out that MD4 has much
faster performance. Because of that, simply switching to md5() instead of
hash() might not be the ideal solution. Instead, the problem could be solved by
checking for hash(), and if it is unavailable, switch to using md5(). If that's
what ends up being done, then it should be mentioned in the documentation
somewhere that enabling hash() will result in a small performance improvement.

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