array_udiff_uassoc
(PHP 5)
array_udiff_uassoc — Computes the difference of arrays with additional index check, compares data and indexes by a callback function
說明
$array1
, array $array2
[, array $...
], callable $value_compare_func
, callable $key_compare_func
)Computes the difference of arrays with additional index check, compares data and indexes by a callback function.
Note that the keys are used in the comparison unlike array_diff() and array_udiff().
參數
-
array1 -
The first array.
-
array2 -
The second array.
-
value_compare_func -
在第一個參數小於、等於或大於第二個參數時，該比較函式必須相應地回傳一個小於、等於或大於 0 的整數。
-
key_compare_func -
The comparison of keys (indices) is done also by the callback function
key_compare_func. This behaviour is unlike what array_udiff_assoc() does, since the latter compares the indices by using an internal function.
回傳值
Returns an array containing all the values from
array1 that are not present in any of the other
arguments.
範例
Example #1 array_udiff_uassoc() example
<?php
class cr {
private $priv_member;
function cr($val)
{
$this->priv_member = $val;
}
static function comp_func_cr($a, $b)
{
if ($a->priv_member === $b->priv_member) return 0;
return ($a->priv_member > $b->priv_member)? 1:-1;
}
static function comp_func_key($a, $b)
{
if ($a === $b) return 0;
return ($a > $b)? 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),);
$result = array_udiff_uassoc($a, $b, array("cr", "comp_func_cr"), array("cr", "comp_func_key"));
print_r($result);
?>
上例將輸出：
Array
(
[0.1] => cr Object
(
[priv_member:private] => 9
)
[0.5] => cr Object
(
[priv_member:private] => 12
)
[0] => cr Object
(
[priv_member:private] => 23
)
)
In our example above you see the "1" => new cr(4) pair is present in both arrays and thus it is not in the output from the function. Keep in mind that you have to supply 2 callback functions.
註釋
Note: Please note that this function only checks one dimension of a n-dimensional array. Of course you can check deeper dimensions by using, for example, array_udiff_uassoc($array1[0], $array2[0], "data_compare_func", "key_compare_func");.
參見
- array_diff() - Computes the difference of arrays
- array_diff_assoc() - Computes the difference of arrays with additional index check
- array_udiff() - Computes the difference of arrays by using a callback function for data comparison
- array_udiff_assoc() - Computes the difference of arrays with additional index check, compares data by a callback function
- array_intersect() - Computes the intersection of arrays
- array_intersect_assoc() - Computes the intersection of arrays with additional index check
- array_uintersect() - Computes the intersection of arrays, compares data by a callback function
- array_uintersect_assoc() - Computes the intersection of arrays with additional index check, compares data by a callback function
- array_uintersect_uassoc() - Computes the intersection of arrays with additional index check, compares data and indexes by a callback functions
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