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<?php $color = array(4 => 'white', 6 => 'green', 11=> 'red'); echo reset($color); var_dump($color); ?>
based on uksPM
Output for 4.3.0 - 7.1.0
whitearray(3) { [4]=> string(5) "white" [6]=> string(5) "green" [11]=> string(3) "red" }