Php get duplicate values in multidimensional array

I have this issue with multidimensional arrays.

Given the following multidimensional array:

Array[
[0] => Array["a", "b", "c"]
[1] => Array["x", "y", "z"]
[2] => Array["a", "b", "c"]
[3] => Array["a", "b", "c"]
[4] => Array["a", "x", "z"]
]

I want to check its values and find duplicates [i.e. keys 0, 2 and 3] leaving just one key - value pair deleting the others, resulting in somthing like this:

Array[
    [0] => Array["a", "b", "c"]
    [1] => Array["x", "y", "z"]
    [2] => Array["a", "x", "z"]
    ]

How can I do that??

This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode characters