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@ 2017-07-07T03:27:49Z

<?php

class A {
    const FOO = [
        'bar' => true,
        'lol' => false,
    ];
}

var_dump(
    empty(A::FOO['bar']),
    empty(A::FOO['lol']),
    empty(A::FOO['wtf'])
);

Output
Performance
VLD
References
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var_dump: documentation ( source)

preferences:dark modelive preview

57.31 ms | 402 KiB | 5 Q