I stumbled over this when I modified PHP code written by someone else.
I was baffled that a simple comparison (if ($var ==! " ")) didn't work as expected.
After some testing I realized that whoever wrote that code used ==! instead of !== as comparison operator.
I've never seen ==! in any language so I wondered how the hell this code could even work and did some testing:
JUST SMILE :>
true !== false: bool(true)
true !== true: bool(false)
true ==! false: bool(true)
true ==! true: bool(false)
true === false: bool(false)
true === true: bool(true)
DO YOU SEE ?
The operator seems to work for boolean and integer variables, but not for strings.
I can't find ==! in the PHP documentation or anything about it on any search engine
(tried Google, Bing, DuckDuckGo, but I suspect they try to interpret it instead of searching for the literal string).
Has anybody seen this before and can shed any light on this behavior?
HOHO
I was baffled that a simple comparison (if ($var ==! " ")) didn't work as expected.
After some testing I realized that whoever wrote that code used ==! instead of !== as comparison operator.
I've never seen ==! in any language so I wondered how the hell this code could even work and did some testing:
JUST SMILE :>
true !== false: bool(true)
true !== true: bool(false)
true ==! false: bool(true)
true ==! true: bool(false)
true === false: bool(false)
true === true: bool(true)
DO YOU SEE ?
The operator seems to work for boolean and integer variables, but not for strings.
I can't find ==! in the PHP documentation or anything about it on any search engine
(tried Google, Bing, DuckDuckGo, but I suspect they try to interpret it instead of searching for the literal string).
Has anybody seen this before and can shed any light on this behavior?
HOHO
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