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dba_exists

dba_exists

(PHP 4, PHP 5)

dba_existsCheck whether key exists

说明

bool dba_exists ( string $key , resource $handle )

dba_exists() checks whether the specified key exists in the database.

参数

key

The key the check is performed for.

handle

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

返回值

Returns TRUE if the key exists, FALSE otherwise.

参见


  • 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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