public Judy::count ([ int $index_start = 0 [, int $index_end = -1 ]] ) : int
Count the number of elements in the Judy array.
index_start
Start counting from the given index. Default is first index.
index_end
Stop counting when reaching this index. Default is last index.
Return the number of elements.
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https://www.php.net/manual/en/judy.count.php