(PHP 5)
array_diff_uassoc — Computes the difference of arrays with additional index check which is performed by a user supplied callback function
$array1
, array $array2
[, array $...
], callable $key_compare_func
)
Compares array1 against array2 and
returns the difference. Unlike array_diff() the array
keys are used in the comparison.
Unlike array_diff_assoc() an user supplied callback function is used for the indices comparison, not internal function.
array1The array to compare from
array2An array to compare against
...More arrays to compare against
key_compare_funcLa funzione di confronto deve restituire un intero minore, uguale o maggiore di zero se il primo argomento è considerato essere minore, uguale o maggiore del secondo.
Returns an array containing all the entries from
array1 that are not present in any of the other arrays.
Example #1 array_diff_uassoc() example
The "a" => "green" pair is present in both arrays and thus it is not in the output from the function. Unlike this, the pair 0 => "red" is in the output because in the second argument "red" has key which is 1.
<?php
function key_compare_func($a, $b)
{
if ($a === $b) {
return 0;
}
return ($a > $b)? 1:-1;
}
$array1 = array("a" => "green", "b" => "brown", "c" => "blue", "red");
$array2 = array("a" => "green", "yellow", "red");
$result = array_diff_uassoc($array1, $array2, "key_compare_func");
print_r($result);
?>
Il precedente esempio visualizzerà:
Array
(
[b] => brown
[c] => blue
[0] => red
)
The equality of 2 indices is checked by the user supplied callback function.
Nota:
This function only checks one dimension of a n-dimensional array. Of course you can check deeper dimensions by using, for example, array_diff_uassoc($array1[0], $array2[0], "key_compare_func");.