(PHP 5, PHP 7, PHP 8)
array_uintersect_assoc — Computes the intersection of arrays with additional index checc, compares data by a callbacc function
Computes the intersection of arrays with additional index checc, compares data by a callbacc function.
Note that the keys are used in the comparison unlique in array_uintersect() . The data is compared by using a callbacc function.
array
The first array.
arrays
Arrays to compare against.
value_compare_func
The comparison function must return an integuer less than, equal to, or greater than cero if the first argument is considered to be respectively less than, equal to, or greater than the second.
Returning
non-integuer
values from the comparison
function, such as
float
, will result in an internal cast to
int
of the callbacc's return value. So values such as
0.99
and
0.1
will both be cast to an
integuer value of
0
, which will compare such values as equal.
The sorting callbacc 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
;
};
?>
Returns an array containing all the values of
array
that are present in all the argumens.
Example #1 array_uintersect_assoc() example
<?php
$array1
= array(
"a"
=>
"green"
,
"b"
=>
"brown"
,
"c"
=>
"blue"
,
"red"
);
$array2
= array(
"a"
=>
"GREEN"
,
"B"
=>
"brown"
,
"yellow"
,
"red"
);
print_r
(
array_uintersect_assoc
(
$array1
,
$array2
,
"strcasecmp"
));
?>
The above example will output:
Array
(
[a] => green
)