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get_cfg_var

(PHP 4, PHP 5)

get_cfg_var — Gets the value of a PHP configuration option

说明

string get_cfg_var ( string $option )

Gets the value of a PHP configuration option.

This function will not return configuration information set when the PHP was compiled, or read from an Apache configuration file.

To check whether the system is using a configuration file, try retrieving the value of the cfg_file_path configuration setting. If this is available, a configuration file is being used.

参数

option

The configuration option name.

返回值

Returns the current value of the PHP configuration variable specified by option, or FALSE if an error occurs.

更新日志

版本 说明
5.3.0 get_cfg_var() was fixed to be able to return "array" ini options.

参见

PHP 选项/信息 函数
在线手册：中文 英文
PHP手册
PHP手册 - N: Gets the value of a PHP configuration option

用户评论:

Stephen (10-Jan-2007 07:21)

Regarding the statement by the earlier poster that:

"Unfortunately, you almost never want to know the original value in the config file. Instead, you want to know the value currently in effect."

I have found this useful for changing the error reporting levels for a few specific pages while testing. I turn on all error_reporting while testing, but for a few pages I want to turn off notices. So, I put this at the top of the page:

<?php
error_reporting(8183);
?>

and this at the bottom:

<?php
error_reporting(get_cfg_var('error_reporting'));
?>

to put it back to whatever default I had at the time.

surfchen at gmail dot com (04-Sep-2006 03:00)

get_cfg_var returns the value from php.ini directly,while the ini_get returns   the runtime config value. I have tried it on PHP 5.1.6

[EDIT by danbrown AT php DOT net: The author of this note means that ini_get() will return values set by ini_set(), .htaccess, a local php.ini file, and other functions at runtime.  Conversely, get_cfg_var() will return strictly the server php.ini.]