PHP Bulk Move File renaming

Public Function Changecovername () {
    $type = ' postgraduate examination ';
    $coverPath = './public/course_cover/kaoyan/';
    $type = ' Level 46 ';
    $coverPath = './public/course_cover/four-six/';//source Directory


    $targetPath = './upload/img/course_img/cover/'. MD5 ($type). ' /';//target directory

    Moving files
    $this->recursecopy ($coverPath, $targetPath);

    Renamed file after move
    $this->changename ($targetPath);

}

Move file functions

//directory file movement, concise and efficient 
 Public function recursecopy ($SRC, $DST) {//original directory, copied to the directory 
 $dir = Opendir ($SRC); 
 @mkdir ($DST); 
 while (false!== ($file = Readdir ($dir))) {
 if ($file! = ') && ($file! = ' ... ')) {
 if (Is_dir ($src. ‘/‘ . $file) {
 $this->recursecopy ($src. ‘/‘ . $file, $dst. ‘/‘ . $file); 
} 
 Else {
 Copy ($src. ‘/‘ . $file, $dst. ‘/‘ . $file); 
} 
} 
} 
 Closedir ($dir); 
} 
 
 

renaming function
    Public Function ChangeName ($targetPath) {
        $d = Dir ($targetPath);
        while (false!== ($entry = $d->read ())) {
            $NEWSTR = Explode ('. ', $entry);
            $newStr [0] = iconv (' GBK ', ' utf-8 ', $newStr [0]);
            $newName = MD5 ($newStr [0]);
            echo $newStr [0]. ' ---'. $newName. ' <br/> ';
            Rename ($targetPath. $entry, $targetPath. $newName. ".". $NEWSTR [1]);
        }
        $d->close ();
    }

PHP Bulk Move File renaming