<?php $array = [ 695 => [ 0 => [ '00:00', '01:00', '01:30', '03:30', '04:00', ] ], 700 => [ 1 => [ '00:00', '00:30', '01:00', '01:30', '02:00', ], 2 => [ '00:00', '00:30', '09:00', '06:30', '07:00', ] ] ]; var_export( array_map( fn($rows) => array_values( array_unique( array_merge(...$rows) ) ), $array ) );
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