Rename two files in two different folders

PHP
1

Hello, I have upload script that uploads a file to images/files and this script also generates a thumbnail image that is placed in images/files/thumbnail.
and in this upload script i have added a Rename button that will rename a file with a .js script that calls the script to rename a file in images/files folder and this works fine,
but i also would like to rename the file in images/files/thumbnail at the same time.

 <?php
$currFileName = $_POST['currFileName'];
$newFileName = $_POST['newFileName'];
$baseDir = '../../../dead_simple_gallery/temp/images/files/';

try {
  if(!preg_match('/^[a-zA-Z0-9-_\\.]+$/', $newFileName)) {
    throw new Exception('Invalid filename!');
  } elseif (!file_exists($baseDir . $currFileName)){
    throw new Exception('The file you are trying to rename doesn\\'t exist');
  } else {
    if(rename($baseDir . $currFileName, $baseDir . $newFileName)){
      echo "Rename successful";
    } else {
      throw new Exception('Could not rename file');
    }
  }
} catch (Exception $e) {
   echo $e->getMessage();
}

?>
2

I fixed it like this:

<?php
$currFileName = $_POST['currFileName'];
$newFileName = $_POST['newFileName'];
$baseDir = '../../../dead_simple_gallery/temp/images/files/';
$thumbsDir = '../../../dead_simple_gallery/temp/images/files/thumbnail/';
echo $thumbsDir;
try {
  if(!preg_match('/^[a-zA-Z0-9-_\\.]+$/', $newFileName)) {
    throw new Exception('Invalid filename!');
  } elseif (!file_exists($baseDir . $currFileName)){
    throw new Exception('The file you are trying to rename doesn\\'t exist');
  } else {
    if(rename($baseDir . $currFileName, $baseDir . $newFileName) && (rename($thumbsDir . $currFileName, $thumbsDir . $newFileName))){
    echo "Rename successful";
    } else {
      throw new Exception('Could not rename file');
    }
  }
} catch (Exception $e) {
   echo $e->getMessage();
}
?>