(PHP 3, PHP 4, PHP 5)putenv -- Sets the value of an environment variable

Description

bool putenv (string setting)

Adds setting to the server environment. The

environment variable will only exist for the duration of the current

request. At the end of the request the environment is restored to its

original state.

Setting certain environment variables may be a potential security breach.

The safe_mode_allowed_env_vars directive contains a

comma-delimited list of prefixes. In Safe Mode, the user may only alter

environment variables whose names begin with the prefixes supplied by

this directive. By default, users will only be able to set environment

variables that begin with PHP_ (e.g.

PHP_FOO=BAR). Note: if this directive is empty, PHP

will let the user modify ANY environment variable!

The safe_mode_protected_env_vars directive contains a

comma-delimited list of environment variables, that the end user won't be

able to change using putenv(). These variables will

be protected even if safe_mode_allowed_env_vars is set

to allow to change them.

Внимание

These directives have only effect when safe-mode itself is enabled!