PHP: array_intersect_key() function
PHP: Computes the intersection of arrays using keys for comparison
The array_intersect_key() is used to create an array containing keys and values of the first array whose keys (i.e. from the first array) are present in all other arrays.
Version:
(PHP 4 and above)
Syntax:
array_intersect_key(array1, array2,....)
Parameters:
| Name | Description | Required / Optional |
Type |
|---|---|---|---|
| array1 | The first array. | Required | Array |
| array2 | An array to check keys against the first array. | Required | Array |
Return value:
An associative array containing all the values of array1 which have matching keys that are present in all arguments.
Value Type: Array
Example:
<?php
$array1 = array("Orange" => 1, "Apple" => 2, "Banana" => 3, "Chery" =>4);
$array2 = array("Orange" => 5, "Banana" => 6, "Mango" =>7);
var_dump(array_intersect_key($array1, $array2));
?>
Output:
array(2) { ["Orange"]=> int(1) ["Banana"]=> int(3)}
Pictorial Presentation:
View the example in the browser
Practice here online :
See also
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