# sybase_pconnect

(PHP 4, PHP 5)

sybase_pconnect — Open persistent Sybase connection

Warning

This function was REMOVED in PHP 7.0.0.

### 说明

sybase_pconnect ([ string `$servername` [, string `$username` [, string `$password` [, string `$charset` [, string `$appname` ]]]]] ) : resource

sybase_pconnect() acts very much like sybase_connect() with two major differences.

First, when connecting, the function would first try to find a (persistent) link that's already open with the same host, username and password. If one is found, an identifier for it will be returned instead of opening a new connection.

Second, the connection to the SQL server will not be closed when the execution of the script ends. Instead, the link will remain open for future use (sybase_close() will not close links established by sybase_pconnect()).

This type of links is therefore called 'persistent'.

### 参数

`servername`

  The servername argument has to be a valid servername that is defined in the 'interfaces' file.

`username`

  Sybase user name

`password`

  Password associated with `username`.

`charset`

  Specifies the charset for the connection

`appname`

  Specifies an appname for the Sybase connection. This allow you to make separate connections in the same script to the same database. This may come handy when you have started a transaction in your current connection, and you need to be able to do a separate query which cannot be performed inside this transaction.

### 返回值

Returns a positive Sybase persistent link identifier on success, or `FALSE` on error.

### 参见

- sybase_connect() - Opens a Sybase server connection