pg_dbname

(PHP 4, PHP 5, PHP 7, PHP 8)

pg_dbname — 获取数据库名称

说明

pg_dbname(?PgSql\Connection $connection = null): string

pg_dbname() 返回指定 PostgreSQL connection 实例的数据库名称。

参数

connection

An PgSql\Connection instance. When connection is null, the default connection is used. The default connection is the last connection made by pg_connect() or pg_pconnect().

警告

As of PHP 8.1.0, using the default connection is deprecated.

返回值

包含 connection 到的数据库名称的 string。

更新日志

版本	说明
8.1.0	现在 `connection` 参数接受 PgSql\Connection 实例，之前接受 resource。
8.0.0	`connection` 可以为 null。

示例

示例 #1 pg_dbname() 示例

<?php
  error_reporting(E_ALL);

  pg_connect("host=localhost port=5432 dbname=mary");
  echo pg_dbname(); // mary
?>

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User Contributed Notes 1 note

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mark at redbrick dot dcu dot ie ¶

20 years ago

This function is as simple as it sounds, it returns the name of the database your are currently connected to on the handle retrieved from a pg_connect() call.

<?php
    $pgsql_conn = pg_connect("dbname=mark host=localhost");

    if ($pgsql_conn) {
        print "Successfully connected to database: " . pg_dbname($pgsql_conn) .
         " on " .  pg_host($pgsql_conn) . "<br/>\n";
    } else {
        print pg_last_error($pgsql_conn);
        exit;
    }
?>

[mark@prodigy][*][~/public_html/php]>>>php pg_dbname.php
Content-type: text/html
X-Powered-By: PHP/4.3.1

Successfully connected to database: mark on localhost<br/>

Again this function is much more useful when you are changing which database you are connected to in your program.

Regards,  --mark

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