How Can I Find the Unique Elements in Two Separate Arrays?

Finding Unique Elements in Flat Arrays

Identifying values that exist exclusively in one of two flat arrays is a common programming task. To solve this problem, consider the following scenario:

Problem:

You have two arrays, $array1 and $array2. You need to determine the set of values that exist in only one of the arrays.

Solution:

To obtain the difference between the two arrays, follow these steps:

$fullDiff = array_merge(array_diff($array1, $array2), array_diff($array2, $array1));

Explanation:

The array_diff() function is used to find the elements that are present in one array but not in the other. However, using array_diff() alone only gives you the difference in one direction. By merging the results of array_diff($array1, $array2) and array_diff($array2, $array1), you capture both sets of unique elements.

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