MODX Auto Rotate Image

autoRotateImage.plugin.php

<?php
/* Based on https://gist.github.com/OptimusCrime/dac5deec0d65872740c9d7bccdc5e336 
** Add system setting named "max_image_dimension" to set a max height or width for images
*/ 
if(!function_exists(autoRotateImage)) {
    function autoRotateImage($image,$max_image_dimension = 0) {
        
        $orientation = $image->getImageOrientation(); 
        switch($orientation) { 
    	    case imagick::ORIENTATION_BOTTOMRIGHT: 
    	    $image->rotateimage("#000", 180); // rotate 180 degrees 
    	    break; 
        
    	    case imagick::ORIENTATION_RIGHTTOP: 
    	    $image->rotateimage("#000", 90); // rotate 90 degrees CW 
    	    break; 
        
    	    case imagick::ORIENTATION_LEFTBOTTOM: 
    	    $image->rotateimage("#000", -90); // rotate 90 degrees CCW 
    	    break; 
        } 
        // Now that it's auto-rotated, make sure the EXIF data is correct in case the EXIF gets saved with the image! 
        $image->setImageOrientation(imagick::ORIENTATION_TOPLEFT);
        
        // Limit the max size to a specific dimension (if set)
        if($max_image_dimension > 0){
            $width = $image->getImageWidth();
            $height = $image->getImageHeight();
            if($width > $height)
                $image->resizeImage($max_image_dimension,0,Imagick::FILTER_LANCZOS,1);
            if($height > $width)
                $image->resizeImage(0,$max_image_dimension,Imagick::FILTER_LANCZOS,1);
        } 
        
    }
}
switch ($modx->event->name) {
    case "OnFileManagerUpload":
        if(!empty($files)){
            foreach($files as $file){ 
                if ($file['type'] != "image/jpeg" && $file['type'] != "image/png")
                	return;
                $max_image_dimension = $modx->getOption('max_image_dimension',$scriptProperties,0);
                $basePath = $source->getBasePath();
                $originalFilename = $basePath . $directory . $file['name']; 
                if(file_exists($originalFilename)){
                    $imagen = new Imagick($originalFilename);
                    autoRotateImage($imagen,$max_image_dimension);
                    $imagen->writeImage($originalFilename); 
                }else{
                    $modx->log(xPDO::LOG_LEVEL_ERROR, $originalFilename. ' NOT FOUND!');
                }
                
            }
        }
        return;
        break;
}
return;

on line 5 the function has to be quoted
if(!function_exists('autoRotateImage')) {