自编函数解决pathinfo()函数处理中文问题

function path_info($filepath)  
{  
    $path_parts = array();  
    $path_parts ['dirname'] = rtrim(substr($filepath, 0, strrpos($filepath, '/')),"/")."/";  
    $path_parts ['basename'] = ltrim(substr($filepath, strrpos($filepath, '/')),"/");  
    $path_parts ['extension'] = substr(strrchr($filepath, '.'), 1);  
    $path_parts ['filename'] = ltrim(substr($path_parts ['basename'], 0, strrpos($path_parts ['basename'], '.')),"/");  
    return $path_parts;  
}