PHP 8.4.0 Alpha 2 available for testing


(PHP 5, PHP 7, PHP 8)

array_intersect_uassocComputes the intersection of arrays with additional index check, compares indexes by a callback function


array_intersect_uassoc(array $array, array ...$arrays, callable $key_compare_func): array

array_intersect_uassoc() returns an array containing all the values of array that are present in all the arguments. Note that the keys are used in the comparison unlike in array_intersect().

Elenco dei parametri


Initial array for comparison of the arrays.


Arrays to compare keys against.


La 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.

callback(mixed $a, mixed $b): int

Returning non-integer values from the comparison function, such as float, will result in an internal cast to int of the callback's return value. So values such as 0.99 and 0.1 will both be cast to an integer value of 0, which will compare such values as equal.

Valori restituiti

Returns the values of array whose values exist in all of the arguments.


Example #1 array_intersect_uassoc() example

= array("a" => "green", "b" => "brown", "c" => "blue", "red");
$array2 = array("a" => "GREEN", "B" => "brown", "yellow", "red");

print_r(array_intersect_uassoc($array1, $array2, "strcasecmp"));

Il precedente esempio visualizzerà:

    [b] => brown

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