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run code in 150+ php & hhvm versions
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<?php $constant = 'STDOUT'; if (defined($constant) && ! is_scalar(constant($constant))) { echo 'Yes, I am non-scalar constant'; }
based on 3hM1Q
Output for 5.2.3 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Yes, I am non-scalar constant
Output for 4.3.0 - 5.2.2