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# pg_version

(PHP 5)

pg_version -- Returns an array with client, protocol and server version (when available)

## 说明

array pg_version ( [resource connection] )

pg_version() returns an array with the client, protocol and server version. Protocol and server versions are only avaliable if PHP was compiled with PostgreSQL 7.4 or later.

For more detailed server information, use pg_parameter_status().

## 参数

connection

  PostgreSQL database connection resource. When connection is not present, the default connection is used. The default connection is the last connection made by pg_connect() or pg_pconnect().

## 返回值

Returns an array with client, protocol and server_version keys and values (if available). Returns `FALSE` on error or invalid connection.

## 范例

例子 1. pg_version() example

`<?php $dbconn = pg_connect("host=localhost port=5432 dbname=mary") or die("Could not connect"); $v = pg_version($dbconn); echo $v['client']; ?>`

上例将输出：

    7.4

## 参见

pg_parameter_status()

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