Answered Upload Multiple Files To A User Folder Using Formit

<?php
// initialize output;
$output = true;
 
// valid extensions
$ext_array = array('pdf', 'PDF', 'txt', 'doc', 'docx', 'rtf', 'XLS', 'XLSX', 'xls', 'xlsx',);
 
// create unique path for this form submission
$uploadpath = 'assets/uploads/';
 
// you can create some logic to automatically
// generate some type of folder structure here.
// the path that you specify will automatically
// be created by the script if it doesn't already
// exist.
 
// EXAMPLE:
// this would put all file uploads into a new,
// unique folder every day.
// $uploadpath = 'assets/'uploads/'.date('Y-m-d').'/';
 
// get full path to unique folder
$target_path = $modx->config['base_path'] . $uploadpath;
 
// get uploaded file names:
$submittedfiles = array_keys($_FILES);
 
// loop through files
foreach ($submittedfiles as $sf) {
 
    // Get Filename and make sure its good.
    $filename = basename( $_FILES[$sf]['name'] );
 
    // Get file's extension
    $ext = pathinfo($filename, PATHINFO_EXTENSION);
    $ext = mb_strtolower($ext); // case insensitive
 
    // is the file name empty (no file uploaded)
    if($filename != '') {
         
        // is this the right type of file?
        if(in_array($ext, $ext_array)) {
     
            // clean up file name and make unique
            $filename = mb_strtolower($filename); // to lowercase
            $filename = str_replace(' ', '_', $filename); // spaces to underscores
            $filename = date("Y-m-d_G-i-s_") . $filename; // add date & time
             
            // full path to new file
            $myTarget = $target_path . $filename;
             
            // create directory to move file into if it doesn't exist
            mkdir($target_path, 0755, true);
             
            // is the file moved to the proper folder successfully?
            if(move_uploaded_file($_FILES[$sf]['tmp_name'], $myTarget)) {
                // set a new placeholder with the new full path (if you need it in subsequent hooks)
                $modx->setPlaceholder('fi.'.$sf.'_new', $myTarget);
                // set the permissions on the file
                if (!chmod($myTarget, 0644)) { /*some debug function*/ }
                 
            } else {
                // File not uploaded
                $errorMsg = 'There was a problem uploading the file.';
                $hook->addError($sf, $errorMsg);
                $output = false; // generate submission error
            }
         
        } else {
            // File type not allowed
            $errorMsg = 'Type of file not allowed.';
            $hook->addError($sf, $errorMsg);
            $output = false; // generate submission error
        }
     
    // if no file, don't error, but return blank
    } else {
        $hook->setValue($sf, '');
    }
 
}
 
return $output;

<div class="row clearfix">
        <div class="label">Supplementary Files <span class="error">[[+fi.error.nomination_file]]</span></div> <!-- end of .label -->
        <div class="input"><input id="nomination_file" name="nomination_file:required" type="file" value="[[+fi.nomination_file]]" maxlength="100000" /></div> <!-- end of .input -->
    </div>

@INHERIT assets/uploads/

[[!FileUpload? &uploadTv=`UploadPath`]]

[[!FileUpload? &path=`assets/uploads/`]] 

[[!FileUpload? &path=`assets/uploads/transport/`]]