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<?php $a = array( 2 => 1, 1 => 2, 0 => 3, ); var_dump($a); var_dump(array_splice($a, 1));
Output for 4.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
array(3) { [2]=> int(1) [1]=> int(2) [0]=> int(3) } array(2) { [0]=> int(2) [1]=> int(3) }
Output for hhvm-3.10.0

Process exited with code 153.