# dba_popen

(PHP 4, PHP 5, PHP 7)

dba_popen — Open database persistently

### 说明

dba_popen ( string `$path` , string `$mode` [, string `$handler` [, mixed `$...` ]] ) : resource

dba_popen() establishes a persistent database instance for `path` with `mode` using `handler`.

### 参数

`path`

  Commonly a regular path in your filesystem.

`mode`

  It is r for read access, w for read/write access to an already existing database, c for read/write access and database creation if it doesn't currently exist, and n for create, truncate and read/write access.

`handler`

  The name of the handler which shall be used for accessing `path`. It is passed all optional parameters given to dba_popen() and can act on behalf of them.

### 返回值

Returns a positive handle on success 或者在失败时返回 `FALSE`.

### 参见

- dba_open() - Open database
- dba_close() - Close a DBA database