## 例

`

     array array_udiff ( array $array1 , array $array2 [, array $ ... ], callback $data_compare_func )

`

## 説明

Computes the difference of arrays by using a callback function for data comparison. This is unlike array_diff() which uses an internal function for comparing the data.

## 戻り値

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