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Последние активные темы форума |
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array_udiff
(PHP 5) array_udiff -- Computes the difference of arrays by using a callback function for data comparison
Descriptionarray array_udiff ( array array1, array array2 [, array ..., callback data_compare_func] ) array_udiff() returns an array
containing all the values of array1
that are not present in any of the other arguments.
Note that keys are preserved. For the comparison of the data
data_compare_func is used.
It 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. This is unlike array_diff() which uses an
internal function for comparing the data.
Пример 1. array_udiff() example
<?php
class
cr
{
private $priv_member
;
function
cr
(
$val
)
{
$this
->
priv_member
=
$val
;
}
function
comp_func_cr
(
$a
,
$b
)
{
if (
$a
->
priv_member
===
$b
->
priv_member
) return
0
;
return (
$a
->
priv_member
>
$b
->
priv_member
)?
1
:-
1
;
}
}
$a
= array(
"0.1"
=> new
cr
(
9
),
"0.5"
=> new
cr
(
12
),
0
=> new
cr
(
23
),
1
=> new
cr
(
4
),
2
=> new
cr
(-
15
),);
$b
= array(
"0.2"
=> new
cr
(
9
),
"0.5"
=> new
cr
(
22
),
0
=> new
cr
(
3
),
1
=> new
cr
(
4
),
2
=> new
cr
(-
15
),);
$result
=
array_udiff
(
$a
,
$b
, array(
"cr"
,
"comp_func_cr"
));
print_r
(
$result
);
?>
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Результат выполнения данного примера: Array
(
[0.5] => cr Object
(
[priv_member:private] => 12
)
[0] => cr Object
(
[priv_member:private] => 23
)
) |
|
Замечание:
Two elements are considered equal if and only if
(string) $elem1 === (string) $elem2. In words:
when the string representation is the same.
Замечание:
Please note that this function only checks one dimension of a n-dimensional
array. Of course you can check deeper dimensions by using
array_udiff($array1[0], $array2[0], "data_compare_func");.
Смотрите также
array_diff(),
array_diff_assoc(),
array_diff_uassoc(),
array_udiff_assoc(),
array_udiff_uassoc(),
array_intersect(),
array_intersect_assoc(),
array_uintersect(),
array_uintersect_assoc() and
array_uintersect_uassoc().
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