Hi,
for those interested, a pull request implementing an exists() construct
(on PHP 7) is available for testing and reviewing :
https://github.com/php/php-src/pull/1530
exists() is modelled after isset(), with the difference that every value
(including null) returns true. Check the included '.phpt' test file for
examples.
The corresponding RFC, targeting 7.1, will come soon.
Regards
François
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