How to delete all files on the directory (keep the most advanced directory)

How to delete all files in the directory (keep the top level directory)
I want to delete directories and files in a directory, but keep the most advanced directory. How to say, to delete all directories and files under/upload/, but keep the/upload directory.
The following function will also remove the/upload directory

PHP Code

  
   function Deldir ($dir) {    //delete files under directory:    $dh =opendir ($dir);    while ($file =readdir ($DH)) {        if ($file! = "." && $file! = "...") {            $fullpath = $dir. " /". $file;            if (!is_dir ($fullpath)) {                unlink ($fullpath);            } else {                deldir ($fullpath);}}    }    Closedir ($DH);    Delete current folder:    if (RmDir ($dir)) {        return true;    } else {        return false;}    }

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Comments are written on:

PHP Code

Delete current folder:/* if (rmdir ($dir)) {return true;    } else {return false; }*/
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   PHP Code
   
   
function Deldir ($dir) {//delete files under directory: $dh =opendir ($dir); while ($file =readdir ($DH)) {if ($file! = "." && $file! = "...") {$fullpath = $dir. "            /". $file;            if (!is_dir ($fullpath)) {unlink ($fullpath);            } else {deldir ($fullpath); }}} closedir ($DH);}
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     PHP Code
     
     
function Deldir ($dir) {$t = array ();  $DH = Opendir ($dir); while ($file =readdir ($DH)) {if ($file! = "." && $file! = "...") {$fullpath = $dir. "      /". $file;      if (!is_dir ($fullpath)) {unlink ($fullpath);        } else {deldir ($fullpath); $t [] = $fullpath;//Because the directory is occupied, it cannot be deleted.  Save Up}}} closedir ($DH); if ($t) array_map (' RmDir ', $t);//delete all subdirectories}
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Or when the directory is deleted to determine whether upload is not deleted
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In your original function
} else {
Deldir ($fullpath);//The return value of Deldir is not undertaken here
}
There is no point in returning. So I didn't write back

If you need to return to do this
      
      

       
       

         PHP code 
        
function Deldir ($dir) {$t = array ();  $r = true;  $DH = Opendir ($dir); while ($file =readdir ($DH)) {if ($file! = "." && $file! = "...") {$fullpath = $dir. "      /". $file;      if (!is_dir ($fullpath)) {unlink ($fullpath);        } else {$r &= deldir ($fullpath); $t [] = $fullpath;//Because the directory is occupied, it cannot be deleted.  Save Up}}} closedir ($DH); if ($t) foreach ($t as $f) $r &= rmdir ($f);//delete all subdirectories return $r;} 
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