PHP: array_intersect_ ukey() function

Last update on August 19 2022 21:50:40 (UTC/GMT +8 hours)

PHP: Computes the intersection of arrays using a callback function

The array_intersect_ukey() function is used to compare two or more arrays, against keys, using a user-supplied function.

The function returns an array containing all the values of the first array which have matching keys that are present in all the arguments.

Version:

(PHP 4 and above)

Syntax:

array_intersect_ukey(array_name1, array_name2, array_name3.......user-defined-function)

Parameters:

Name	Description	Required / Optional	Type
array_name1	Initial array for comparison with other arrays.	Required	Array
array_name2	The first array to compare with keys of array_name1.	Required	Array
array_name3	The second array to compare with keys of array_name1.	Optional	Array
user-defined-function	User supplied function to do the comparison.	Required	Function

Return value:

The values of array_name1 whose keys exist in all the arguments.

Value Type: Array

Example :

<?php
function user_function($ukey1, $ukey2)
{
if ($ukey1 == $ukey2)
return 0;
else if ($ukey1 > $ukey2)
return 1;
else
return -1;
}
$array1 = array("Orange" => 1, "Apple" => 2, "Banana" => 3, "Chery" => 4);
$array2 = array("Orange" => 5, "Banana" => 6, "Mango" => 7, 'Guava'=> 8);
var_dump(array_intersect_ukey($array1, $array2,"user_function"));
?>

Output:

array(2){ ["Orange"]=> int(1) ["Banana"]=> int(3)}

Pictorial Presentation:

php function reference: array_intersect_ ukey() function

View the example in the browser

Practice here online :

See also

PHP Function Reference

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