How to remove same values from two arrays?

Question

I have tried array_merge and array_unique but it couldn't helped me out.

Here is my code:

    public function syncContacts() {
        $data['data'] = $this->main_manager->select_all('users'); # get all user data
        $info[0] = [
            "contact_name" => "a",
            "number" => "031651651"
        ];
        $info[1] = [
            "contact_name" => "b",
            "number" => "+923402382972"
        ];
        $info[2] = [
            "contact_name" => "c",
            "number" => "31651651"
        ];
        $info[3] = [
            "contact_name" => "d",
            "number" => "6165165123323"
        ];
        $info[4] = [
            "contact_name" => "e",
            "number" => "316516512113"
        ];

        for ($i = 0; $i < count($info); $i++) { # info array loop
            if (substr($info[$i]['number'], 0, 1) == "+") { # finds + sign in numbers
                for ($x = 0; $x < count($data['data']); $x++) { # user data array loop
                    if (
                            $info[$i]['number'] == $data['data'][$x]['country_code'] . $data['data'][$x]['phone_number']        # first condition
                            || $info[$i]['number'] == $data['data'][$x]['country_code'] . 0 . $data['data'][$x]['phone_number'] # second condition
                    ) {
                        $finalData['data']['registered'][$i]['name'] = $info[$i]['contact_name'];
                        $finalData['data']['registered'][$i]['number'] = $info[$i]['number'];
                    } else {
                        $finalData['data']['unregistered'][$i]['name'] = $info[$i]['contact_name'];
                        $finalData['data']['unregistered'][$i]['number'] = $info[$i]['number'];
                        $result = array_unique(array_merge($finalData['data']['unregistered'][$i], $info[$i]));
//        
                    }
 } # end of user data array loop
            } else { # finds 0 in numbers
                for ($x = 0; $x < count($data['data']); $x++) { # user data array loop
                    if (
                            $info[$i]['number'] == $data['data'][$x]['phone_number']        # first condition
                            || 0 . $info[$i]['number'] == $data['data'][$x]['phone_number'] # second condition
                            || $info[$i]['number'] == 0 . $data['data'][$x]['phone_number'] # third condition
                    ) {

                        $finalData['data']['registered'][$i]['name'] = $info[$i]['contact_name'];
                        $finalData['data']['registered'][$i]['number'] = $info[$i]['number'];
                    } else {
                        $finalData['data']['unregistered'][$i]['name'] = $info[$i]['contact_name'];
                        $finalData['data']['unregistered'][$i]['number'] = $info[$i]['number'];

                        $result = array_unique(array_merge($finalData['data']['unregistered'][$i], $info[$i]));
//                        $result = array_merge($finalData['data']['unregistered'][$i], $info[$i]);
//                        $finalData['data']['unregistered'][$i] = array_unique($result);
                    }
                } # end of user data array loop
            }
        } #end of info array loop 
        print_r($finalData);
        die();
    }

I am making a sync contacts webservice.

In $data array I am getting data from users table and I have 8 record in it. 3 record matched from my given array which is $info and two are unmatched. I made an array which is $finalData['data'].

I have to separate the record in registered and unregistered key of $finalData array. I have separated matched numbers in registered key of an array but couldn't separate the correct unmatched numbers in unregistered key of the array.

I am getting this result:

Array
(
    [data] => Array
        (
            [unregistered] => Array
                (
                    [0] => Array
                        (
                            [name] => a
                            [number] => 031651651
                        )

                    [1] => Array
                        (
                            [name] => b
                            [number] => +923402382972
                        )

                    [2] => Array
                        (
                            [name] => c
                            [number] => 31651651
                        )

                    [3] => Array
                        (
                            [name] => d
                            [number] => 6165165123323
                        )

                    [4] => Array
                        (
                            [name] => e
                            [number] => 316516512113
                        )

                )

            [registered] => Array
                (
                    [0] => Array
                        (
                            [name] => a
                            [number] => 031651651
                        )

                    [1] => Array
                        (
                            [name] => b
                            [number] => +923402382972
                        )

                    [2] => Array
                        (
                            [name] => c
                            [number] => 31651651
                        )

                )

        )

)

Answer 1

Match index of first array with another and unset the matched index and then you will get the unregistered numbers.

Answer 2

How about using a hash like array? See example here http://php.net/manual/en/language.types.array.php