dbmnextkey
    (PHP 3, PHP 4, PECL)
dbmnextkey -- 
     Retrieves the next key from a DBM database
Description
string 
dbmnextkey ( resource 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 
<?php
  $key = dbmfirstkey($dbm_id); while ($key) {     echo "$key = " . dbmfetch($dbm_id, $key) . "\n";     $key = dbmnextkey($dbm_id, $key); }
  ?>
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