can i use an existing feedback form within modx?

[!eform .... eFormOnBeforeMailSent=`onBeforeMailSentFunction` !] 

<?php
function onBeforeMailSentFunction(&$fields){
  //manipulate directly from the $_FILES array!
  //eform does limited validation on uploaded files (see documentation)
  //The fact that this code runs means that eform validated everything OK
  //Do extra validation here if needed - you can set the $fields['validationmessage'] 
  //with some message and return false from the function to indicate an error
  
  $filename = $_FILES['myfile']['name'];
  //create unique filename (of sorts) if you want
  $filename = uniqid('upload_').substr($filename,strrpos($filename,'.'));
  $destination = '/whatever/your/path/is/' . $filename; //make sure folder is writable!
  //try to move the uploaded file
  if( @move_uploaded_file($_FILES['file']['tmp_name'], $destination))
  {
    //have a [+moved_file_name+] place holder in your report to see the new filename
    $fields['moved_file_name'] =  $filename;
    return true;
  }else{
    $fields['validationmessage'] = "Could not save the uploaded file.";
    return false;
  }
}
?>

<?php
function onBeforeMailSentFunction(&$fields){
//this is where the class is
include('assets/snippets/upload/class.upload.php');
//name of my upload field
$handle = new Upload($_FILES['recipe_image']);

if ($handle->uploaded) {
       
        // yes, the file is on the server
        // below are some example settings which can be used if the uploaded file is an image.
        $handle->image_resize            = true;
        $handle->image_ratio_y           = true;
        $handle->image_x                 = 150;

        // now, we start the upload 'process'. That is, to copy the uploaded file
        // from its temporary location to the wanted location
        // It could be something like $handle->Process('/home/www/my_uploads/');
         //where to save the files to
        $handle->Process('assets/images/recipes/');
        
        // we check if everything went OK
        if ($handle->processed) {
            // everything was fine !
            echo '<fieldset>';
            echo '  <legend>File uploaded and resized with success</legend>';
            echo '  <img src="assets/images/recipes/' . $handle->file_dst_name . '" />';
            $info = getimagesize($handle->file_dst_pathname);
            echo '  <p>' . $info['mime'] . '  -  ' . $info[0] . ' x ' . $info[1] .'  -  ' . round(filesize($handle->file_dst_pathname)/256)/4 . 'KB</p>';
            echo '  link to the file just uploaded: <a href="assets/images/recipes/' . $handle->file_dst_name . '">' . $handle->file_dst_name . '</a><br/>';
            echo '</fieldset>';
        } else {
            // one error occured
            echo '<fieldset>';
            echo '  <legend>file not uploaded to the wanted location</legend>';
            echo '  Error: ' . $handle->error . '';
            echo '</fieldset>';
			    return false;
        }

        // we now process the image a second time, with some other settings
        $handle->image_resize            = true;
        $handle->image_ratio_y           = true;
        $handle->image_x                 = 150;
        $handle->image_reflection_height = '25%';
        $handle->image_contrast          = 10;

        $handle->Process('assets/images/recipes/');
        
        // we check if everything went OK
        if ($handle->processed) {
            // everything was fine !
            echo '<p>Want more magic?</p>';
            echo '<fieldset>';
            echo '  <legend>increasing contrast and adding a reflection to make it look more tasty</legend>';
            echo '  <img src="assets/images/recipes/' . $handle->file_dst_name . '" />';
            $info = getimagesize($handle->file_dst_pathname);
            echo '  <p>' . $info['mime'] . '  -  ' . $info[0] . ' x ' . $info[1] .'  -  ' . round(filesize($handle->file_dst_pathname)/256)/4 . 'KB</p>';
            echo '  link to the file just uploaded: <a href="assets/images/recipes/' . $handle->file_dst_name . '">' . $handle->file_dst_name . '</a><br/>';
            echo '</fieldset>';
			$fields['recipe_image'] =  "assets/images/recipes/".$handle->file_dst_name;
			 return true;
        } else {
            // one error occured
            echo '<fieldset>';
            echo '  <legend>file not uploaded to the required location</legend>';
            echo '  Error: ' . $handle->error . '';
            echo '</fieldset>';
			    return false;
        }

        // we delete the temporary files
        $handle-> Clean();

    } else {
        // if we're here, the upload file failed for some reasons
        // i.e. the server didn't receive the file
        echo '<fieldset>';
        echo '  <legend>file not uploaded on the server</legend>';
        echo '  Error: ' . $handle->error . '';
        echo '</fieldset>';
		    return false;
    }
}
?>