$_ENV -- $HTTP_ENV_VARS [deprecated] — Environment variables
An associative array of variables passed to the current script via the environment method.
These variables are imported into PHP's global namespace from the environment under which the PHP parser is running. Many are provided by the shell under which PHP is running and different systems are likely running different kinds of shells, a definitive list is impossible. Please see your shell's documentation for a list of defined environment variables.
Other environment variables include the CGI variables, placed there regardless of whether PHP is running as a server module or CGI processor.
$HTTP_ENV_VARS contains the same initial information, but is not a superglobal. (Note that $HTTP_ENV_VARS and $_ENV are different variables and that PHP handles them as such)
| Версия | Описание |
|---|---|
| 4.1.0 | Introduced $_ENV that deprecated $HTTP_ENV_VARS. |
Пример #1 $_ENV example
<?php
echo 'My username is ' .$_ENV["USER"] . '!';
?>
Assuming "bjori" executes this script
Результатом выполнения данного примера будет что-то подобное:
My username is bjori!
Замечание:
Это 'суперглобальная' или автоматическая глобальная переменная. Это просто означает что она доступна во всех контекстах скрипта. Нет необходимости выполнять global $variable; для доступа к ней внутри метода или функции.