Joins an array of strings together to form one long string, with the
optional separator inserted between each of them.
If str_array has no items, the return value will be an
empty string. If str_array contains a single item, separator will not
appear in the resulting string.
Joins an array of strings together to form one long string, with the optional separator inserted between each of them.
If str_array has no items, the return value will be an empty string. If str_array contains a single item, separator will not appear in the resulting string.