On Tue, Jul 2, 2013 at 9:40 AM, Thomas Gries mail@tgries.de wrote:
PHP codestyle question re. isset( $array['key'][0] ) versus array_key_exists( 0, $array['key'] )
On a recent patch [1], we had a discussion what is - or may be - better
- isset( $array['key'][0] )
- array_key_exists( 0, $array['key'] )
In my opinion, isset() is usually clearer and "more natural", in part because you don't have to guess/memorize the order of parameters (which is haystack again, and which is needle?).
There is however a functional difference: if your array can contain null as a valid value, then isset() can give you a false negative. So beware...
-- brion