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run code in 150+ php & hhvm versions
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<?php $arr = array(10, 11, 13); print_r(count($arr)); unset($arr[2]); //array_splice($arr, 2, 1); var_dump($arr);
based on 34N4V
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
3array(2) { [0]=> int(10) [1]=> int(11) }