Clash Royale CLAN TAG#URR8PPP

How do I compare a string array to a numeric array?

dear users of StackOverflow. There is some problem.

Array 1:
array: 3 [▼
   0 => "8"
   1 => "13"
   2 => "15"
]

Array 2:
array: 16 [▼
   0 => 7
   1 => 8
   2 => 9
]


array_diff does not work, because in the first number, in the second string.

Please suggest any ideas for solving the issue. I will be happy with any comment. Many thanks.

1 Answer
1

You can use array_udiff to compare the arrays using a user-defined callback which converts the values to ints before comparing:

array_udiff

$array1 = array('8', '13', '15');
$array2 = array(7, 8, 9);
$diffs = array_udiff($array1, $array2, function ($a, $b) return (int)$a - (int)$b; );
print_r($diffs);


Output:

Array
(
[1] => 13
[2] => 15
)


It has been pointed out that the specific output hasn't been specified, so here is how to get all unique values:

$diffs1 = array_udiff($array1, $array2, function ($a, $b) return (int)$a - (int)$b; );
$diffs2 = array_udiff($array2, $array1, function ($a, $b) return (int)$a - (int)$b; );
$diffs = array_merge($diffs1, $diffs2);
print_r($diffs);


Output:

Array
(
[0] => 13
[1] => 15
[2] => 7
[3] => 9
)


and all matching values using array_uintersect:

array_uintersect

$same = array_uintersect($array1, $array2, function ($a, $b) return (int)$a - (int)$b; );
print_r($same);


Output:

Array
(
[0] => 8
)


array_diff

array_udiff

0

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