Error message

• Warning: preg_grep(): Unknown modifier '9' in _spnet_custom_files_in_folder() (line 1939 of D:\Websites\SPNetSQLSites\gpwholesalesql\home\sites\all\modules\spnet_custom\spnet_custom_helper_functions.php).
• Warning: Invalid argument supplied for foreach() in _spnet_custom_files_in_folder() (line 1942 of D:\Websites\SPNetSQLSites\gpwholesalesql\home\sites\all\modules\spnet_custom\spnet_custom_helper_functions.php).
• Notice: Array to string conversion in _spnet_custom_product_details() (line 1074 of D:\Websites\SPNetSQLSites\gpwholesalesql\home\sites\all\modules\spnet_custom\spnet_custom.module).