PHP获取包含子目录的文件列表

从示例

if ( ! function_exists('glob_recursive')){    // Does not support flag GLOB_BRACEfunction glob_recursive($pattern, $flags = 0)   {     $files = glob($pattern, $flags);     foreach (glob(dirname($pattern).'/*', GLOB_onLYDIR|GLOB_NOSORT) as $dir)     {       $files = array_merge($files, glob_recursive($dir.'/'.basename($pattern), $flags));     }     return $files;   }}