need custom counter per line (row)

need_cust_counter.php

<?php
/**
 * Plugin Name: WooCommerce Modify CSV output
 * Plugin URI: http://rayflores.com/plugins/csv-modifier/
 * Description: Dan Colucci modifier
 * Version: 1.0.1
 * Author: Ray Flores
 * Author URI: http://rayflores.com
 */


/**
 * Add the product price to the individual line item entry
 *
 * @param array      $line_item    the original line item data
 * @param array      $item         WC order item data
 * @param WC_Product $product      the product
 * @return string
 */
 $GLOBALS['wc_csv_export_index'] = 0;
function wc_csv_export_order_line_line_number( $line_item, $item, $product) {
		
	$line_item['num'] = $GLOBALS['wc_csv_export_index']+1; //$product->get_price();
	
	$line_item['price'] = $product->get_price();
	$line_item['sku'] = $product->get_sku();
	$line_item['item_qty'] = $item['qty'];
$GLOBALS['wc_csv_export_index']++;
	return $line_item;
}
add_filter( 'wc_customer_order_csv_export_order_line_item', 'wc_csv_export_order_line_line_number', 10, 3 );


/**
 * Add the item_price column data for the Default - One Row per Item format
 *
 * @param array $order_data the original order data
 * @param array $item       the item for this row
 * @return array
 */
function wc_csv_export_order_row_one_row_per_line_number( $order_data, $item ) {

	$order_data['line_number'] = $item['num'];
	$order_data['item_price'] = $item['price'];
	$order_data['item_sku']      = $item['sku'];
	$order_data["item_qty"] =  $item['item_qty'];



	return $order_data;
}
add_filter( 'wc_customer_order_csv_export_order_row_one_row_per_item', 'wc_csv_export_order_row_one_row_per_line_number', 10, 2 );

// set order columns
function rf_wc_csv_export_custom_order_columns( $column_headers, $csv_generator ){
		if ( 'default_one_row_per_item' === $csv_generator->order_format ) {
 
$column_headers = array(
			'cust_num' => '', // custom numbering
			'order_number'				=> '', // 'Order Number', 
			'order_date'               		=>  '', // 'Order Date',
			'billing_email'             		=>  '', // 'E-Mail Address',
			'billing_full_name' 		=>  '', // 'Bill-to Name',
			'billing_address_1'  =>  '', // 'Bill-to Address', 		
			'billing_address_2'  =>  '', // 'Bill-to Address2',	
			'billing_city'        	=>  '', // 'Bill-to City',
			'billing_state'       	=>  '', // 'Bill-to State',
			'billing_postcode'    =>  '', // 'Bill-to Zip Code',
			'billing_country'      =>  '', // 'Bill-to Country',
			'shipping_full_name'	=>  '', // 'Ship-to Name', 
			'shipping_address_1' =>  '', // 'Ship-to Address',//shipping address line 1
			'shipping_address_2' =>  '', // 'Ship-to Address2',//shipping address line 2
			'shipping_city'                 =>  '', // 'Ship-to City',//shipping cite
			'shipping_state'				=>  '', // 'Ship-to State',//shipping state
			'shipping_postcode'            =>  '', // 'Ship-to Zip Code',//shipping postal code
			'shipping_country'       =>  '', // 'Ship-to Country',//shipping country
			'shipping_method' =>  '', // 'Carrier',
			'shipping_method_service_level' =>  '', // 'Carrier Service Level',
			'shipping_total' =>  '', // 'Shipping Price',
			'tax_total' =>  '', // 'Sales Tax',
			'order_discount' =>  '', // 'Order Discount',
			'line_number'				=>  '', // 'Line Number', // line number
			'item_sku' =>  '', // 'Item Number (SKU)',
			'item_qty'		=>  '', // 'Quantity', // item quantity
			'item_price' 			=>  '', // 'Unit Price',
		);

	}
	return $column_headers;
}
add_filter( 'wc_customer_order_csv_export_order_headers', 'rf_wc_csv_export_custom_order_columns', 10, 4 );

  function rf_wc_csv_export_modify_row_data( $order_data, $order, $csv_generator) {

		

		foreach ($order as $cust_data) {
			$i = 0;
			foreach ($order->get_items() as $item ) {
			$custom_data['cust_num'] = ++$i; 
			} 
			$custom_data['billing_full_name'] = $order->billing_first_name . ' ' . $order->billing_last_name;
			$custom_data['shipping_full_name'] = $order->shipping_first_name . ' ' . $order->shipping_last_name;
			
				}


	

	if ( 'default_one_row_per_item' === $csv_generator->order_format ) {
		foreach ( $order_data as $data ) {
	
			$new_order_data[] = array_merge( (array) $data, $custom_data );
		}
	} else {

		$new_order_data = array_merge( $order_data, $custom_data );
	}
	return $new_order_data;

}
add_filter( 'wc_customer_order_csv_export_order_row', 'rf_wc_csv_export_modify_row_data', 10, 3 );

function rf_wc_remove_column_headers($csv){

		$first_line = strpos($csv,"\n");
		$csv = substr($csv,$first_line+1);
		return $csv;	
}
add_filter('wc_customer_order_csv_export_generated_csv','rf_wc_remove_column_headers', 10, 4);

function rf_wc_csv_export_modify_row_data( $order_data, $order, $csv_generator) {

$custom_data['billing_full_name'] = $order->billing_first_name . ' ' . $order->billing_last_name;
$custom_data['shipping_full_name'] = $order->shipping_first_name . ' ' . $order->shipping_last_name;

if ( 'default_one_row_per_item' === $csv_generator->order_format ) {

    $i = 0;
    foreach ( $order_data as $data ) {
            ++$i; 
            $custom_data['cust_num'] = $i;

        $new_order_data[] = array_merge( (array) $data, $custom_data );
    }

} else {


    $custom_data['cust_num'] = 1;

    $new_order_data = array_merge( $order_data, $custom_data );
}
return $new_order_data;

}