Description
void
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.
| Warning |
These directives have only effect when safe-mode itself is enabled!
|
Example 1. Setting an Environment Variable putenv ("UNIQID=$uniqid"); |
|
See also getenv().
