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# dbmnextkey

(PHP 3 <= 3.0.18, PHP 4 >= 4.0.0)

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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