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run code in 200+ php & hhvm versions
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<?php $a = [ 'specials/primary-program' => '/members', 'specials/marijuana-job ' => '/careers', ]; var_dump(array_key_exists('specials/marijuana-job', $a));
Output for 5.6.30, hhvm-3.15.4 - 3.22.0, 7.0.0 - 7.2.9
bool(false)