dba_firstkey

dba_firstkey

(PHP 4, PHP 5)

dba_firstkeyFetch first key

说明

string dba_firstkey ( resource $handle )

dba_firstkey() returns the first key of the database and resets the internal key pointer. This permits a linear search through the whole database.

参数

handle

The database handler, returned by dba_open() or dba_popen().

返回值

Returns the key on success 或者在失败时返回 FALSE.

参见

  • dba_nextkey() - Fetch next key
  • dba_key_split() - Splits a key in string representation into array representation
  • Example 2 in the DBA examples

  • dba_close
  • dba_delete
  • dba_exists
  • dba_fetch
  • dba_firstkey
  • dba_handlers
  • dba_insert
  • dba_key_split
  • dba_list
  • dba_nextkey
  • dba_open
  • dba_optimize
  • dba_popen
  • dba_replace
  • dba_sync
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