<?php $array = [ ['123', 'aaa'], ['124', 'bbb'], ['124', 'ccc'], ['125', 'ddd'], ['124', 'eee'], ['123', 'fff'], ]; var_export( array_reverse(array_column(array_reverse($array), null, 0)) ); $result = []; foreach ($array as $row) { if (!isset($result[$row[0]])) { $result[$row[0]] = $row; } } var_export(array_values($result));
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