<?php $array = [ ['b', 'd', 'c', 'a', ''], ['c', 'a', 'd', '', ''], ['b', 'd', 'a', '', ''], ['c', 'd', 'a', 'b', ''] ]; var_export( array_map( fn($row) => array_values(array_diff($row, ['c'])), $array ) );
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