PHP: array_intersect_ uassoc() function

Last update on August 19 2022 21:50:39 (UTC/GMT +8 hours)

PHP: Computes the intersection of arrays with additional index check, callback function

The array_intersect_uassoc() function is used to compare two or more arrays with an additional user supplied function (comparison function).

The comparison function returns an integer less than, equal to, or greater than zero if the first argument is considered to be respectively less than, equal to, or greater than the second.

Note: Before PHP 7.0.0 this integer had to be in the range from -2147483648 to 2147483647.

Version:

(PHP 4 and above)

Syntax:

array_intersect_uassoc(array1, array2, array3 ..., user_function)

Parameters:

Name	Description	Required / Optional	Type
array1	The specified array which will be compared with other arrays.	Required	Array
array2	Compared with the first array.	Required	Array
array3	Compared with the first array.	Optional
user_function	A function to do the comparison.	Required	-

Return value:

The values of array1 whose values exist in all of the arguments.

Value Type: Array

Example:

<?php
$array1 = array("a" => "Orange", "b" => "Apple", "c" => "Banana", "Chery");
$array2 = array("A" =>"Orange", "b" => "Banana","Mango");
$result = var_dump(array_intersect_uassoc($array1, $array2,"strcasecmp"));
print_r($result)
?>

Output:

array(1) {["a"]=> string(6) "Orange"}

Pictorial Presentation:

php function reference: array_intersect_ uassoc() function

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