dba_exists Check whether key exists php函数


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_delete() - Delete DBA entry specified by key
  • dba_fetch() - Fetch data specified by key
  • dba_insert() - Insert entry
  • dba_replace() - Replace or insert entry



相关阅读:
dba_fetch Fetch data specified by key
dba_firstkey Fetch first key
dba_handlers List all the handlers available
dba_insert Insert entry
dba_key_split Splits a key in string representation into array representation
dba_list List all open database files
dba_nextkey Fetch next key
dba_open Open database
dba_optimize Optimize database
dba_popen Open database persistently
dba_replace Replace or insert entry
dba_sync Synchronize database
dcgettext Overrides the domain for a single lookup
dcngettext Plural version of dcgettext
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