PHP Function array_udiff_assoc()

Syntax

array_udiff_assoc ( $array1, $array2 [, $array3 ..., $data_compare_func] );

Definition and Usage

Computes the difference of arrays with additional index check, compares data by a callback function and returns an array containing all the values from array1 that are not present in any of the other arguments.

Paramters

Parameter	Description
array1	Required. Specifies an array.
array2	Required. Specifies an array to be compared with the first array.
array3	Optional. Specifies an array to be compared with the first array.
data_compare_func	Required. The name of the user-made function.

Return Values

Returns an array containing all the values from array1 that are not present in any of the other arguments.

Example

Try out following example:

<?php function call_back_function($v1,$v2) { if ($v1===$v2) { return 0; } return 1; } $array1 = array("a"=>"orange","b"=>"apple","c"=>"mango"); $array2 = array("a"=>"orange","b"=>"mango","c"=>"apple"); print_r(array_udiff_assoc($array1,$array2,"call_bak_function")); ?>

This will produce following result:

Array ( [b]=>apple [c] => mango )