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run code in 200+ php & hhvm versions
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<?php $x = array(1, 2, 3, 4, 5); unset($x[2]); print_r($x);
Output for 4.3.0 - 7.1.10
Array ( [0] => 1 [1] => 2 [3] => 4 [4] => 5 )