How Can I Find the Unique Elements in Two Arrays Using PHP?

Identifying Non-Overlapping Elements in Two Arrays

In this programming scenario, you have two flat arrays:

$array1 = [64, 98, 112, 92, 92, 92];
$array2 = [3, 26, 38, 40, 44, 46, 48, 52, 64, 68, 70, 72, 102, 104, 106, 92, 94, 96, 98, 100, 108, 110, 112];

Your objective is to determine the values that appear exclusively in one of these arrays. In other words, you want to find the elements that are not shared between the two arrays.

Solution Using array_diff()

To find the non-overlapping elements, you can utilize the array_diff() function in PHP. This function takes two arrays as input and returns an array containing the values that exist in the first array but not in the second.

To get the difference between $array1 and $array2, you can use the following code:

$diff1 = array_diff($array1, $array2);

This will give you an array containing the values that are unique to $array1. Similarly, you can find the values exclusive to $array2 using:

$diff2 = array_diff($array2, $array1);

Combining the Differences

The array_diff() function only finds values that exist in one array but not the other. To obtain a comprehensive list of values that occur in only one of the arrays, you need to merge the two difference arrays.

This can be achieved with the following code:

$fullDiff = array_merge($diff1, $diff2);

The resulting $fullDiff array will contain all the non-overlapping elements from both $array1 and $array2.

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