The array_uintesect_assoc() function compares two or more arrays, both in a built in function and
in a user-made function, and then returns an array containing the elements from the first array,
if the functions allow it. The built in function compares the keys. The user-made function
compares the values, and returns a numeric value, 0 if the returned array should contain this
Hint: You can compare the first array with one array, or as many as you like.
Note: For comparison, the key is used in the built-in function and the value is used in
the user-made function.
The output of the code above will be:
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