Forminator Pro - Change Upload Path to uploads/form_id

forminator-change-upload-dir.php

<?php

/**
 * Plugin Name: Forminator Pro - Change Upload Path
 * Plugin URI: https://premium.wpmudev.org/
 * Description: mu-plugin for changing the Forminator upload dir to /uploads/ID.
 * Version: 1.0.0
 * Author: Konstantinos Xenos @ WPMUDEV
 * Author URI: https://premium.wpmudev.org/
 * License: GPLv2 or later
 */

class Change_Forminator_Upload_Dir {

	/**
	 * New dir var.
	 *
	 * @var $new_dir_id
	 */
	private $new_dir_id = 0;

	/**
	 * Constructor.
	 */
	public function __construct() {
		add_action( 'forminator_form_before_save_entry', array( $this, 'my_form_change_upload_dir' ) );
		add_action( 'forminator_form_after_save_entry', array( $this, 'my_form_restore_upload_dir' ) );
	}

	/**
	 * Hook into Forminator and apply the upload_dir filter.
	 *
	 * @param int $form_id The form ID.
	 */
	public function my_form_change_upload_dir( $form_id ) {
		$this->new_dir_id = $form_id;
		add_filter( 'upload_dir', array( $this, 'my_form_ad_formid_to_upload_dir' ) );
	}

	/**
	 * Hook into the upload_dir filter and change the path.
	 *
	 * @param array $param The upload dir parameters array.
	 */
	public function my_form_ad_formid_to_upload_dir( $param ) {
		$new_path = '/new-upload-folder/';

		$param['path'] = $param['basedir'] . $new_path;
		$param['url']  = $param['baseurl'] . $new_path;

		return $param;
	}

	/**
	 * Hook into Forminator and remove the upload_dir filter.
	 *
	 * @param int $form_id The form ID.
	 */
	public function my_form_restore_upload_dir( $form_id ) {
		$this->new_dir_id = 0;
		remove_filter( 'upload_dir', array( $this, 'my_form_ad_formid_to_upload_dir' ) );
	}
}

new Change_Forminator_Upload_Dir();