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@ 2015-12-28T01:40:27Z

<?php

class foo {
    const BAR = [1,2,3];
    
    function foobar() 
    {
        var_dump(isset(BAR[1]));    
    }
}

Output
Performance
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var_dump: documentation ( source)

preferences:dark modelive preview

53.5 ms | 402 KiB | 5 Q