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@ 2014-07-29T09:23:43Z

<?php

class A {
    public static $a = null;
}

class B extends A {
}

class C {
    public static $a = null;
}
var_dump(isset(A::$a), isset(B::$a), isset(C::$c));

Output
Performance
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var_dump: documentation ( source)

preferences:dark modelive preview

43.39 ms | 402 KiB | 5 Q