Manual do PHP
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dba_exists

(PHP 3>= 3.0.8, PHP 4 , PHP 5)

dba_exists -- Check whether key exists

Descrição

bool dba_exists ( string key, resource handle )

dba_exists() checks whether the specified key exists in the database.

key: The key the check is performed for.
handle: The database handler, returned by dba_open() or dba_popen().

Returns TRUE if the key exists, FALSE otherwise.

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