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<?php $arrayone = array("test","test2","test3"); echo '<pre>'; print_r(arrayone); echo '</pre>';
based on pRIk0
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
<pre> Notice: Use of undefined constant arrayone - assumed 'arrayone' in /in/rCFGc on line 7 arrayone</pre>
Output for hhvm-3.10.0

Process exited with code 137.