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PHP5中文手册

dbmfirstkey

(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