(PHP 4 >= 4.2.0, PHP 5, PHP 7)
apache_setenv — Set an Apache subprocess_env variable
apache_setenv ( string $variable , string $value [, bool $walk_to_top = false ] ) : bool
apache_setenv() sets the value of the Apache environment variable specified by variable.
Note:
When setting an Apache environment variable, the corresponding $_SERVER variable is not changed.
variable
The environment variable that's being set.
value
The new variable value.
walk_to_top
Whether to set the top-level variable available to all Apache layers.
Returns true on success or false on failure.
Example #1 Setting an Apache environment variable using apache_setenv()
<?php
apache_setenv("EXAMPLE_VAR", "Example Value");
?> Note:
apache_setenv() can be paired up with apache_getenv() across separate pages or for setting variables to pass to Server Side Includes (.shtml) that have been included in PHP scripts.
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https://www.php.net/manual/en/function.apache-setenv.php