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# dbmnextkey

(PHP 3, PHP 4 )

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:

示範 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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