# array_intersect_assoc

(PHP 4 >= 4.3.0, PHP 5, PHP 7)

array_intersect_assoc — Computes the intersection of arrays with additional index check

### Description

array_intersect_assoc ( array `$array` , array `...$arrays` ) : array

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

### Parameters

`array`

  The array with master values to check.

`arrays`

  Arrays to compare values against.

### Return Values

Returns an associative array containing all the values in `array` that are present in all of the arguments.

### Examples

Example #1 array_intersect_assoc() example

`<?php
$array1 = array("a" => "green", "b" => "brown", "c" => "blue", "red");
$array2 = array("a" => "green", "b" => "yellow", "blue", "red");
$result_array = array_intersect_assoc($array1, $array2);
print_r($result_array);
?>`

The above example will output:

    Array
    (
        [a] => green
    )

In our example you see that only the pair `"a" => "green"` is present in both arrays and thus is returned. The value `"red"` is not returned because in $array1 its key is `0` while the key of "red" in $array2 is `1`, and the key `"b"` is not returned because its values are different in each array.

The two values from the `key => value` pairs are considered equal only if `(string) $elem1 === (string) $elem2` . In other words a strict type check is executed so the string representation must be the same.

### See Also

- array_intersect() - Computes the intersection of arrays
- array_uintersect_assoc() - Computes the intersection of arrays with additional index check, compares data by a callback function
- array_intersect_uassoc() - Computes the intersection of arrays with additional index check, compares indexes by a callback function
- array_uintersect_uassoc() - Computes the intersection of arrays with additional index check, compares data and indexes by separate callback functions
- array_diff() - Computes the difference of arrays
- array_diff_assoc() - Computes the difference of arrays with additional index check