Compressing/Resizing images on upload

<?php
$images = new Imagick(glob('assets/p-images/*.JPG'));
$imageprops = $image->getImageGeometry();
if ($imageprops['width'] <= 800 && $imageprops['height'] <= 600) {
        // don't upscale
    } else 
    foreach($images as $image) {
      // Providing 0 forces thumbnailImage to maintain aspect ratio
      $image->resizeImage(800,600, imagick::FILTER_LANCZOS, 0.9, true);
    }


return;

<?php
// resize all images in p-images
$dir  = $modx->getOption('base_path') . 'assets/p-images/';      //original images
$wdir  = $modx->getOption('base_path') . 'assets/w-images/';     //watermarked images
$files = glob($dir . "*.jpg"); //get all jpg from dir

$watermark = new Imagick($modx->getOption('base_path') . "assets/images/watermark.png");
foreach($files as $images) {
   
  $image = new Imagick ($images);
  $imageprops = $image->getImageGeometry();
  if ($imageprops['width'] <= 800 && $imageprops['height'] <= 600) { 
    //is smaller, do nothing 
  }
  else {
    // Providing 0 forces thumbnailImage to maintain aspect ratio
    $image->resizeImage(800,600, imagick::FILTER_BOX, 0.8, true);
     // write orig. images
	  $image->writeImages($images, true);
  }
  $images = str_replace("p-images", "w-images", $images);
  $image->compositeImage($watermark, imagick::COMPOSITE_OVER, 0, 0);
  $image->writeImages($images, true);
  
}
return;