Returns the array element in the next place that's
pointed by the internal array pointer, or FALSE if there are no more
elements.
next() behaves like
current(), with one difference. It advances the
internal array pointer one place forward before returning the
element. That means it returns the next array element and
advances the internal array pointer by one. If advancing the
internal array pointer results in going beyond the end of the
element list, next() returns FALSE.
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