PHP recursively traverses all files in the specified directory and counts the number of files

PHP recursively traverses all files in the specified directory and counts the number of files

//Recursive function implements traversing the directory and number of files under the specified file

function total($dirname,&$dirnum, &$filenum){
 $dir=opendir($dirname);
 echo readdir($dir).""; //Read files in the current directory
 echo readdir($dir)." "; //Read the upper-level directory file
 while($filename=readdir($dir)){
 //What needs to be determined is whether the path under $dirname is a directory
 $newfile=$dirname."/".$filename ;
 //The is_dir() function determines whether the path of the current script is a directory
 if(is_dir($newfile)){
 //Traverse the directories or files in its subdirectories through the recursive function
 total($newfile, $dirnum,$filenum);
 $dirnum++;
 }else{
 $filenum++;
 }
 }
 closedir($dir);
}

$dirnum=0;
$filenum=0;
total("E :/AppServ/www/phpMyAdmin",$dirnum,$filenum);
echo "Total number of directories: ".$dirnum."";
echo "Total number of files: ".$filenum." "; //End of traversing the specified file directory and number of files
?>

PHP