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run code in 200+ php & hhvm versions
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<?php var_dump(array_values(array_filter([150, null])));
based on SsAFo
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.2.6
array(1) { [0]=> int(150) }