How do I remove duplicates in a two-dimensional array?

How do I remove duplicates in a two-dimensional array?
I have a array,var_dump. The value is:
Array (1) {[0]=> Array (3) {[0]=> string (0) "" [1]=> string (4) "Ancient Shepherd" [2]=> string (0) ""}}
Now to add a new value to this array: $info [] = $insert;
After the addition, I want to get rid of the duplicate items I don't want the same item to have two
I use Array_unique ($info) No matter how to go heavy?
is if there is another item {"", "Ancient Shepherd", ""}

As long as one item or the other is added, judge

------Solution--------------------

PHP Code

function Array_multiunique ($ar) {  $t = Array_map (' serialize ', $ar);  $t = Array_unique ($t);  Return Array_map (' unserialize ', $t);}   $ar = Array ("  ", "Ancient Shepherd", ""),  Array ("", "" Ancient Shepherd "," "),);p Rint_r (Array_multiunique ($ar));
