3v4l.org

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<?php var_dump([-2 => 2, 0, 1]);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
array(3) { [-2]=> int(2) [-1]=> int(0) [0]=> int(1) }
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.6 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33
array(3) { [-2]=> int(2) [0]=> int(0) [1]=> int(1) }

preferences:
118.69 ms | 408 KiB | 5 Q