Php/docs/function.dba-exists

• PHP Manual
• DBA 函数
• Check whether key exists

dba_exists

(PHP 4, PHP 5, PHP 7)

dba_exists — Check whether key exists

说明

dba_exists ( string $key , resource $handle ) : bool

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