pg_parameter_status

(PHP 5)

pg_parameter_status — Looks up a current parameter setting of the server.

说明

string pg_parameter_status ( resource $connection , string $param_name )

string pg_parameter_status ( string $param_name )

Looks up a current parameter setting of the server.

Certain parameter values are reported by the server automatically at connection startup or whenever their values change. pg_parameter_status() can be used to interrogate these settings. It returns the current value of a parameter if known, or FALSE if the parameter is not known.

Parameters reported as of PostgreSQL 8.0 include server_version, server_encoding, client_encoding, is_superuser, session_authorization, DateStyle, TimeZone, and integer_datetimes. (server_encoding, TimeZone, and integer_datetimes were not reported by releases before 8.0.) Note that server_version, server_encoding and integer_datetimes cannot change after PostgreSQL startup.

PostgreSQL 7.3 or lower servers do not report parameter settings, pg_parameter_status() includes logic to obtain values for server_version and client_encoding anyway. Applications are encouraged to use pg_parameter_status() rather than ad hoc code to determine these values.

Caution

On a pre-7.4 PostgreSQL server, changing client_encoding via SET after connection startup will not be reflected by 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().
param_name: Possible param_name values include server_version, server_encoding, client_encoding, is_superuser, session_authorization, DateStyle, TimeZone, and integer_datetimes.

返回值

A string containing the value of the parameter, FALSE on failure or invalid param_name .

范例

Example#1 pg_parameter_status() example


<?php
  $dbconn = pg_connect("dbname=publisher") or die("Could not connect");

  echo "Server encoding: ", pg_parameter_status($dbconn, "server_encoding");
?>

上例将输出：

Server encoding: SQL_ASCII


	PHP5中文手册 pg_options pg_pconnect PostgreSQL PHP Manual pg_parameter_status (PHP 5) pg_parameter_status — Looks up a current parameter setting of the server. 说明 string pg_parameter_status ( resource `$connection` , string `$param_name` ) string pg_parameter_status ( string `$param_name` ) Looks up a current parameter setting of the server. Certain parameter values are reported by the server automatically at connection startup or whenever their values change. pg_parameter_status() can be used to interrogate these settings. It returns the current value of a parameter if known, or `FALSE` if the parameter is not known. Parameters reported as of PostgreSQL 8.0 include server_version, server_encoding, client_encoding, is_superuser, session_authorization, DateStyle, TimeZone, and integer_datetimes. (server_encoding, TimeZone, and integer_datetimes were not reported by releases before 8.0.) Note that server_version, server_encoding and integer_datetimes cannot change after PostgreSQL startup. PostgreSQL 7.3 or lower servers do not report parameter settings, pg_parameter_status() includes logic to obtain values for server_version and client_encoding anyway. Applications are encouraged to use pg_parameter_status() rather than ad hoc code to determine these values. Caution On a pre-7.4 PostgreSQL server, changing client_encoding via SET after connection startup will not be reflected by 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(). `param_name` Possible `param_name` values include server_version, server_encoding, client_encoding, is_superuser, session_authorization, DateStyle, TimeZone, and integer_datetimes. 返回值 A string containing the value of the parameter, `FALSE` on failure or invalid `param_name` . 范例 Example#1 pg_parameter_status() example `<?php $dbconn = pg_connect("dbname=publisher") or die("Could not connect"); echo "Server encoding: ", pg_parameter_status($dbconn, "server_encoding"); ?>` 上例将输出： Server encoding: SQL_ASCII pg_options pg_pconnect PostgreSQL PHP Manual