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<?php $n = 2; var_dump(key(array_values([1,2,3]))); var_dump(end(array_values([1,2,3])));
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
int(0) Notice: Only variables should be passed by reference in /in/b70OD on line 4 int(3)
Output for 7.3.32 - 7.3.33
int(0) int(3)
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28
int(0) Strict Standards: Only variables should be passed by reference in /in/b70OD on line 4 int(3)

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