set_include_path 
( PHP 4中“ = 4.3.0 , PHP 5中) 
set_include_path -集和include_path配置选项
描述
字符串set_include_path (字符串$ new_include_path ) 
集和include_path配置选项的期限脚本。 
参数
new_include_path 
新的价值和include_path 
返回值
返回旧include_path中的成功或FALSE的失败。 
实例
例如# 1 set_include_path ( )的例子
// Works as of PHP 4.3.0
set_include_path('/inc');
// Works in all PHP versions
ini_set('include_path', '/inc');
?>
实例二:
$path = '/usr/lib/pear';
set_include_path(get_include_path() . PATH_SEPARATOR . $path);
?>