Optin on page==================
[wordpress_file_upload singlebutton="true" multiple="false" uploadpath="uploads/sem/%username%/HW/%pagetitle%" uploadrole="all" maxsize="100" createpath="true" forcefilename="true" duplicatespolicy="maintain both" chunk="false" placements="title/filename+selectbutton/message" uploadtitle="Upload Your Homework"]
"hook" (goes into the plugin, basically footer code) ======================================
if (!function_exists('wfu_after_upload_handler')) {
function wfu_after_upload_handler($changable_data, $additional_data) {
$files = $additional_data["files"];
if ( count($files) > 0 ) {
$url = str_replace(ABSPATH, site_url()."/", $files[0]["filepath"]);
$changable_data["js_script"] = 'document.getElementById("mr-field-element-934314179104").value = "'.$url.'";';
}
return $changable_data;
}
add_filter('wfu_after_upload', 'wfu_after_upload_handler', 10, 2);
}