dba_firstkey

(PHP 4, PHP 5, PHP 7)

dba_firstkey — Fetch first key

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dba_firstkey ( resource $handle ) : string

dba_firstkey() returns the first key of the database and resets the internal key pointer. This permits a linear search through the whole database.

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handle

The database handler, returned by dba_open() or dba_popen().

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Returns the key on success ������ʧ��ʱ���� FALSE.

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