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<?php $array = [[5, 6], [1, 2], [6, 5], [1, 2], [1 => 2, 0 => 1]]; var_export( array_unique($array, SORT_REGULAR) );
Output for 8.1.32 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
array ( 0 => array ( 0 => 5, 1 => 6, ), 1 => array ( 0 => 1, 1 => 2, ), 2 => array ( 0 => 6, 1 => 5, ), )
preferences:
49.29 ms | 852 KiB | 4 Q