php read environment variable code example
Example 1: php get environment variable
$value = getenv("VARNAME");
// returns FALSE if VARNAME does not exist
$env_vars = getenv();
// if no name is specified, an associative array
// with all environment variables is returned
Example 2: php set environment variable
putenv('NAME=VALUE');
// NAME may contain whitespaces ->
putenv('NAME=VALUE')
// is not equivalent to
putenv('NAME = VALUE')