PHP Copy and move directory

<?php
Rename a file or directory
Rename ("phpMyAdmin", "phpadmin");//Rename to Phpadmin

/*
* $DIRSRC Original Directory
* $dirto target Directory
*/

function Copydir ($DIRSRC, $dirto) {

If the original file exists, the judge is not a directory
if (file_exists ($dirto)) {
if (!is_dir ($dirto)) {
echo "Target is not a directory, can not copy into <br>";
Exit
}
}else{
mkdir ($dirto);
}

$dir = Opendir ($DIRSRC);

while ($filename = Readdir ($dir)) {
if ($filename! = "." && $filename! = "...") {
$srcfile = $dirsrc. " /". $filename; Original file
$tofile = $dirto. " /". $filename; Target file

if (Is_dir ($srcfile)) {
Copydir ($srcfile, $tofile); Recursively process all subdirectories
}else{
Files are copied to the target directory
Copy ($srcfile, $tofile);
}
}
}
}

Copydir ("Phpadmin", "d:/phpadmin");

PHP Copy and move directory