Array Unique in a two-dimensional array in PHP

Question

Hi I have an array that looks like this:

Array ( [0] => Array ( [x] => 01 [y] => 244 ) [1] => Array ( [x] => 02 [y] => 244 ) [2] => Array ( [x] => 03 [y] => 244 ) [3] => Array ( [x] => 04 [y] => 243 ) [4] => Array ( [x] => 05 [y] => 243 ) [5] => Array ( [x] => 05 [y] => 244 ) [6] => Array ( [x] => 06 [y] => 242 ) [7] => Array ( [x] => 06 [y] => 243 ) [8] => Array ( [x] => 07 [y] => 243 ) [9] => Array ( [x] => 08 [y] => 243 ) [10] => Array ( [x] => 09 [y] => 242 ) [11] => Array ( [x] => 10 [y] => 244 ) [12] => Array ( [x] => 12 [y] => 243 ) [13] => Array ( [x] => 13 [y] => 243 ) [14] => Array ( [x] => 13 [y] => 243 ) [15] => Array ( [x] => 15 [y] => 243 ) ) 

x represent the values ​​of days and y of a particular variable. I would like to display an array of unique days x (last element) and y values ​​pragmatically.

for example, day 6 I have two y values, but I want to display only the last (243).

thanks for the help

Answer 1

One way to do this is to simply use a simple loop to create a new array, overwriting any existing values ​​for a given date as you go.

Code snippet

// $data = ... your array from the question
$result = array();
foreach ($data as $value) {
    $result[$value['x']] = $value['y'];
}

print_r($result);

results

Array
(
    [01] => 244
    [02] => 244
    [03] => 244
    [04] => 243
    [05] => 244
    [06] => 243
    [07] => 243
    [08] => 243
    [09] => 242
    [10] => 244
    [12] => 243
    [13] => 243
    [15] => 243
)

( ), .