Several very similar array functions

1.array_udiff_action and Array_diff_uaction

①:array array_udiff_assoc ( array $array1 , array $array2 [, array $ ... ], callable $data_compare_func )

array_udiff_assoc- with index Check the difference set of the computed array, using the callback function to compare the data PS: Check the value of the array with the callback function;

②:array ARRAY_DIFF_UASSOC ( array $array1 , array $array2 [, array $... ], callable )

array_diff_uassoc- uses the user-provided callback function to do index checking to calculate the difference of the array PS: Check the key value with the callback function;

Several very similar array functions