<?php $array1 = [ 0 => 2018-08-21 10:00:00, 1 => 2018-08-28 10:00:00, 2 => 2018-09-04 10:00:00, 3 => 2018-09-11 10:00:00, 4 => 2018-09-18 10:00:00, ]; $array2 = [ 0 => 2018-08-21 10:00:00, 1 => 2018-08-28 10:00:00, 2 => 2018-09-04 10:00:00, 3 => 2018-09-11 10:00:00, 4 => 2018-09-18 10:00:00, 5 => 2019-09-18 10:00:00, ]; $diff = array_diff($array1, $array2); var_dump($array1, $array2, $diff);
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