PHP

what's good about it?
what's bad about it?

>>20
The parser has 1375 conflicts and 6 unused terminals, which reflects that the parser implementor doesn't really understand LALR(1)
Parser is so bad, that it parses "a".2 and "a" . 2 differently: i.e. meaning of operator depends on spaces around it, so "1 . 2" is a string "12", while 1.2 is a floating point number.