在laravel框架中删除PHP中的重复数组

Question

I have more than 4 arrays in single variable as shown below

$myArray = Array ( [0] => NA [1] => NA [2] => USA [3] => NA [4] => Texas )Array ( [0] => NA [1] => NA [2] => UK [3] => NA [4] => Texas  )Array ( [0] => NA [1] => NA [2] => USA [3] => NA [4] => Texas ) Array ( [0] => NA [1] => NA [2] => UAE [3] => NA [4] => Texas )

Now i need to compare each and every array of [2] index.

If second index ([2] => USA) is present in some other array then delete duplicate array.

Finally the arrays should look like this

Array ( [0] => NA [1] => NA [2] => USA [3] => NA [4] => Texas )Array ( [0] => NA [1] => NA [2] => UK [3] => NA [4] => Texas )Array ( [0] => NA [1] => NA [2] => UAE [3] => NA [4] => Texas ).

I have tried this but not able to sort it out.

$myArray = array_map("unserialize", array_unique(array_map("serialize", $myArray)));

Is there any way?

Answer 1

You can use a foreach loop for this, like DEMO:

$match = [];
foreach($myArray as $key => $value)
{
    if(!in_array($value[2], $match))
    {
        $match[] = $value[2];
        continue;
    }
    unset($myArray[$key]);
}

This will remove all of the arrays which have duplicate value for [2]