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PHP: dbmfirstkey - Manual
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dbmfetchdbmfirstkey
(PHP 4)
dbmfirstkey — Retrieves the first key from a DBM database
说明
string dbmfirstkey ( resource $dbm_identifier )
Returns the first key in the database. Note that no particular order is guaranteed since the database may be built using a hash-table, which doesn't guarantee any ordering.
参数
- dbm_identifier
-
The DBM link identifier, returned by dbmopen().
返回值
如果成功则返回 TRUE ，失败则返回 FALSE 。
参见
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