php批量重命名文件名

$format ='php';
$path ='www.111com.net/';
$files = getfile($path,$format);

foreach( $files as $v )
{
$tv = basename($v);
list($name,$ext) = explode('.',$tv);
$newname =$path.time().mt_rand(1,10000).'.'.$ext;
if(rename($v,$newname))
{
echo '成功将'.$v.'重命名'.$newname.'
';
}
}

function getfile($path,$format)
{
$dirs = array();
foreach(glob("$path*") as $d)
{
$tmp = explode('.',$d);
$k = end($tmp);
if(is_file($d) && ($k ==strtolower($format) ))
{
$dirs[] = $d;
}
}
return $dirs;
}