(PHP 5, PHP 7)
array_udiff_uassoc — Computes the difference of arrays with additional index check, compares data and indexes by a callback function
$array
, array ...$arrays
, callable $value_compare_func
, callable $key_compare_func
) : arrayComputes 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().
array
The first array.
arrays
Arrays to compare against.
value_compare_func
Funcția de comparare trebuie să întoarcă un întreg mai mic, egal cu sau mai mare decât zero dacă primul argument este considerat respectiv mai mic, egal cu sau mai mare decât al doilea argument. Notă: înainte de PHP 7.0.0 acest întreg trebuia să fie cuprins în domeniul de la -2147483648 până la 2147483647.
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.
Returns an array containing all the values from
array
that are not present in any of the other
arguments.
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);
?>
Exemplul de mai sus va afișa:
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.
Notă: 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");
.