Computes the intersection of arrays using a callback function on the keys for comparison

# array_intersect_ukey

(PHP 5 >= 5.1.0, PHP 7)

array_intersect_ukey — Computes the intersection of arrays using a callback function on the keys for comparison

### Descrierea

array_intersect_ukey ( array `$array1` , array `$array2` [, array `$...` ], callable `$key_compare_func` ) : array

array_intersect_ukey() returns an array containing all the values of `array1` which have matching keys that are present in all the arguments.

### Parametri

`array1`

  Initial array for comparison of the arrays.

`array2`

  First array to compare keys against.

`...`

  Variable list of array arguments to compare keys against.

`key_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.

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

### Valorile întoarse

Returns the values of `array1` whose keys exist in all the arguments.

### Exemple

Example #1 array_intersect_ukey() example

`<?php
function key_compare_func($key1, $key2)
{
if ($key1 == $key2)
return 0;
else if ($key1 > $key2)
return 1;
else
return -1;
}
$array1 = array('blue' => 1, 'red' => 2, 'green' => 3, 'purple' => 4);
$array2 = array('green' => 5, 'blue' => 6, 'yellow' => 7, 'cyan' => 8);
var_dump(array_intersect_ukey($array1, $array2, 'key_compare_func'));
?>`

Exemplul de mai sus va afișa:

    array(2) {
      ["blue"]=>
      int(1)
      ["green"]=>
      int(3)
    }

In our example you see that only the keys 'blue' and 'green' are present in both arrays and thus returned. Also notice that the values for the keys 'blue' and 'green' differ between the two arrays. A match still occurs because only the keys are checked. The values returned are those of `array1`.

### A se vedea și

- array_diff() - Calculează diferența dintre tablouri
- array_udiff() - Computes the difference of arrays by using a callback function for data comparison
- array_diff_assoc() - Computes the difference of arrays with additional index check
- array_diff_uassoc() - Computes the difference of arrays with additional index check which is performed by a user supplied callback function
- array_udiff_assoc() - Computes the difference of arrays with additional index check, compares data by a callback function
- array_udiff_uassoc() - Computes the difference of arrays with additional index check, compares data and indexes by a callback function
- array_diff_key() - Computes the difference of arrays using keys for comparison
- array_diff_ukey() - Computes the difference of arrays using a callback function on the keys for comparison
- array_intersect() - Computes the intersection of arrays
- array_intersect_assoc() - Computes the intersection of arrays with additional index check
- array_intersect_uassoc() - Computes the intersection of arrays with additional index check, compares indexes by a callback function
- array_intersect_key() - Computes the intersection of arrays using keys for comparison