phpは環境変数を設定します

php 環境変数を設定
例:

$g_config['root'] =dirname(realpath(__FILE__)); 
set_include_path($g_config['root'].'/pear'. PATH_SEPARATOR . $g_config['root'] . '/cas' . PATH_SEPARATOR .get_include_path());

注釈:
1、realpath(__FILE__)
2、get_include_path()
3、set_include_path()