The array_unshift() function inserts new elements to an array. The new array values will be
inserted in the beginning of the array. The function's return value is the new number of
elements in the array (See Example).
Hint: You can add one value, or as many as you like.
Note: Numeric keys will start at 0 and increas by 1 (See example3). String keys will
remain the same (See Example).
The output of the code above will be:
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