array_uintersect_uassoc
Computes the intersection of arrays with additional index check, compares data and indexes by separate callback functions
Description
array array_uintersect_uassoc(
array $array1,
array ...$arrays,
callable $value_compare_func,
callable $key_compare_func
)
Parameters
-
array1
-
The first array.
-
arrays
-
Further arrays.
-
value_compare_func
-
The comparison function must return an integer less than, equal to, or greater than zero if the first argument is considered to be respectively less than, equal to, or greater than the second.
int callback(mixed $a, mixed $b)
Caution
Returning non-integer values from the comparison
function, such as float, will result in an internal cast to
int of the callback's return value. So values such as
0.99 and 0.1 will both be cast to an
integer value of 0, which will compare such values as equal.
Caution
The sorting callback must handle any value from any array in any order,
regardless of the order they were originally provided.
This is because each individual array is first sorted before being compared against other arrays.
For example:
<?php
$arrayA = ["string", 1];
$arrayB = [["value" => 1]];
// $item1 and $item2 can be any of "string", 1 or ["value" => 1]
$compareFunc = static function ($item1, $item2) {
$value1 = is_string($item1) ? strlen($item1) : (is_array($item1) ? $item1["value"] : $item1);
$value2 = is_string($item2) ? strlen($item2) : (is_array($item2) ? $item2["value"] : $item2);
return $value1 <=> $value2;
};
?>
-
key_compare_func
-
Key comparison callback function.
Return Values
Returns an array containing all the values of
array1 that are present in all the arguments.
Examples
Example #1 array_uintersect_uassoc example
<?php
$array1 = array("a" => "green", "b" => "brown", "c" => "blue", "red");
$array2 = array("a" => "GREEN", "B" => "brown", "yellow", "red");
print_r(array_uintersect_uassoc($array1, $array2, "strcasecmp", "strcasecmp"));
?>
The above example will output:
Array
(
[a] => green
[b] => brown
)
See Also
- array_uintersect
- array_intersect_assoc
- array_intersect_uassoc
- array_uintersect_assoc