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このドキュメントでは、 php中国語ネットマニュアル リリース
(PECL judy >= 0.1.1)
Judy::prevEmpty — Search for the previous absent index in the Judy array
$index
)Search (exclusive) for the previous index absent that is less than the passed Index.
index
The index can be an integer or a string corresponding to the index where to start the search.
Return the corresponding index in the array.