比较两个数组并返回数组的差异

我的旧数组数据：

[Job] => Array
        (
            [id] => 2
            [job_state_id] => 14
            [assigned_to_id] => 
            [patient_id] => 2
            [prescription] => main
            [case_type_id] => 1
            [upper_midline_id] => 1
            [upper_midline_value] => 0
            [lower_midline_id] => 1
            [lower_midline_value] => 0
            [treat_arches] => 2
            [upper_midline_type_id] => 2
            [lower_midline_type_id] => 2
            [overjet] => 2
            [overbite] => 2
            [arch_form] => 2
            [canine_relationship] => 2
            [molar_relationship] => 1
            [posterior_crossbite] => 1
            [procline] => 2
            [expand] => 2
            [distalize] => 0
            [ipr] => 0
            [close_all_spaces] => 2
            [other_instructions] => other

和我的新数组数据：

[Job] => Array
        (
            [id] => 2
            [job_state_id] => 14
            [assigned_to_id] => 
            [patient_id] => 2
            [prescription] => main complain
            [case_type_id] => 1
            [upper_midline_id] => 1
            [upper_midline_value] => 0
            [lower_midline_id] => 1
            [lower_midline_value] => 0
            [treat_arches] => 2
            [upper_midline_type_id] => 2
            [lower_midline_type_id] => 2
            [overjet] => 2
            [overbite] => 2
            [arch_form] => 2
            [canine_relationship] => 2
            [molar_relationship] => 1
            [posterior_crossbite] => 1
            [procline] => 2
            [expand] => 2
            [distalize] => 0
            [ipr] => 1
            [close_all_spaces] => 2
            [other_instructions] => other instrucations

您可以看到某些值正在更改。我需要将$new数组数据与$old数据数组进行比较，并仅捕获对值所做的更改。我使用了以下代码：

$difference = array_diff($oldJobData, $newJobData);

差变量返回$oldJobData我只想要差值而不是整个数组我也使用以下代码，但无法获得所需的结果。

          $new2 = array();
            foreach ($newJobData as $key => $new_val) {
                if (isset($oldJobData[$key])) { // belongs to old array?
                    if ($oldJobData[$key] != $new_val) // has changed?
                        $new2[$key] = $newJobData[$key]; // catch it
                }
            }