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(PHP 4, PHP 5, PHP 7, PHP 8)
dba_exists — Check whether key exists
$key, resource $dba): bool
dba_exists() checks whether the specified
key exists in the database.
key
The key the check is performed for.
dba
The database handler, returned by dba_open() or dba_popen().
Returns true if the key exists, false otherwise.
