Reserved words are case-insensitive.

[Jesdisciple]

Binary package hint: php5

Ubuntu 9.04
PHP 5.2.6-3ubuntu4.1

At the least, this is a documentation bug; I consider the behavior undesirable, so it's also a feature request. I was told to report bugs to Ubuntu rather than PHP; if this is incorrect, I'll take it upstream myself.

I learned the below function name in other languages where it's allowed, although I'm not certain whether this is because keywords are case-sensitive or because foreach isn't a keyword there.

function forEach(){
}

I expect this to be valid, but PHP says otherwise:
Parse error: syntax error, unexpected T_FOREACH, expecting T_STRING

The manual doesn't mention this that I can find ( http://www.php.net/manual/en/reserved.keywords.php ).

[Ondřej Surý (ondrej)]

From http://us2.php.net/manual/en/functions.user-defined.php
Note: Function names are case-insensitive, though it is usually good form to call functions as they appear in their declaration.

[Jesdisciple (jesdisciple)]

Grr, it would be where I didn't think to check. Sorry. Now I'm curious why that behavior was selected.