(PHP 4, PHP 5, PHP 7, PHP 8)
get_cfg_var — Извлекает значение настройки конфигурации PHP
$option): string|array|false
Извлекает значение настройки конфигурации PHP option.
Функция не вернёт никакой информации, заданной при сборке PHP или указанной в конфигурационном файле Apache.
Чтобы проверить, что система использует файл конфигурации, попробуйте получить значение настройки конфигурации cfg_file_path. Если эта настройка доступна, значит используется файл конфигурации.
optionИмя настройки конфигурации.
Возвращает текущее значение настройки конфигурации PHP
option или false в случае возникновения ошибки.
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.]
settings with the value of 'yes' will be returned as '1'.
<?php
//#my ini file
//A = 1
//B = any-thing
//C = yes
//D = /some/path/file
get_cfg_var('A') // returns '1'
get_cfg_var('B') // returns 'any-thing'
get_cfg_var('C') // returns '1', wait, why?
get_cfg_var('D') // returns '/some/path/file'
?>
I had my setting = yes and then checked it as ==="yes" for epic fail.
keep in mind get_cfg_var() returns a string(1) '1' for the value: On
<?php
//in php.ini
//A = On
$A1 = get_cfg_var("A") === "On";
$A2 = get_cfg_var("A") === 1;
$A3 = get_cfg_var("A") === "1";
//$A1 is false
//$A2 is false
//$A3 is true
?>
Boolean-like values are evaluated as follows: "true", "on", "yes" evaluate to "1" (string 1), while "false", "off", "no" evaluate to "" (empty string).
The difference between ini_get() and get_cfg_var() is as follows:
@) ini_get(): returns the current value in .htaccess or as defined in PHP_INI_USER or PHP_INI_PERDIR
@) get_cfg_var: returns the values defined in the php.ini
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.
