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<?php var_dump(array_fill(10, 3, 'hi')); var_dump(array_fill(0, 3, 'hi')); echo '<wtf>'."\n"; var_dump(array_fill(-10, 3, 'hi')); echo '</wtf>';
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
array(3) { [10]=> string(2) "hi" [11]=> string(2) "hi" [12]=> string(2) "hi" } array(3) { [0]=> string(2) "hi" [1]=> string(2) "hi" [2]=> string(2) "hi" } <wtf> array(3) { [-10]=> string(2) "hi" [0]=> string(2) "hi" [1]=> string(2) "hi" } </wtf>