Re: Behaviour of $array1 + $array2

Yasuo Ohgaki wrote: > Markus Fischer wrote: > >> Can someone point me where the following behaviour is documented: >> >> $ php -q >> <? >> $foo = array(27 => 'Ene'); >> $bar = array(-1 => 'Mene'); >> >> $baz = $foo + $bar; >> >> var_dump($baz); >> ?> >> array(2) { >> [27]=> >> string(3) "Ene" >> [-1]=> >> string(4) "Mene" >> } >> >> cheers >> >> - Markus >> >> > > I guess it's not. > > There is note explains this behavior. Accoding to the note, > "PHP Developer's Cookbook claims (p. 87 and sort of on p. 108) > that '+' is syntactic sugar for array_merge." > Actually it's not really. It's similar -- but in this case array_merge() would have re-ordered the keys to 0 and 1, whereas the '+' is more of an array_merge_assoc() type function... it forces the merge to be treated as associative.