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# dbmnextkey

dbmnextkey -- retrieves the next key from a dbm database

## Description

`string dbmnextkey`(int dbm_identifier, string key);

Returns the next key after `key`. By calling dbmfirstkey() followed by successive calls to dbmnextkey() it is possible to visit every key/value pair in the dbm database. For example:

Example 1. Visiting every key/value pair in a dbm database.
    $key = dbmfirstkey($dbm_id);
    while ($key) {
        echo "$key = " . dbmfetch($dbm_id, $key) . "\n";
        $key = dbmnextkey($dbm_id, $key);
    }

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