How do I fix undefined index for 3/4 problems

See more:

PHP

Hi please see the issue below
I am getting these errors on different pages. This only happened after migrating the site. It uses woo commerce also.

Notice: Undefined index: filtering in C:\xampp
Notice: Undefined index: product_cat in C:\xampp
Notice: Undefined index: pa_product-rules in C:

Code is below

*add_action('woocommerce_before_shop_loop','wpm_product_cat_archive_add_meta');
function wpm_product_cat_archive_add_meta($args){
	global $posts;
	echo "<pre>";print_r($posts);
	exit;
}*/
add_action('init','productrecomm');
function productrecomm(){
	global $wpdb;	

	if(!is_admin()){
		$filtering = $_REQUEST['filtering'];
		$product_cat = $_REQUEST['product_cat'];
		$pa_productrules = $_REQUEST['pa_product-rules'];
		if($filtering==1&&$product_cat!=''&&$pa_productrules!='') {
			$args = array(
			    'post_type' => 'product',
			    'posts_per_page' => -1,
			    'posts_status' => 'publish',
			    'tax_query' => array(
			    	 array(
				      'taxonomy'        => 'product_cat',
				      'field'           => 'slug',
				      'terms'           => array($product_cat),
				      'operator'        => 'IN',
				    ),
				    array(
				        'taxonomy'      => 'pa_product-rules',
				        'terms'         => $pa_productrules,
				        'field'         => 'slug',
				        'operator'      => 'IN'
				        )
				    )
			);

Also then what I have is this error when it should filter the section of the shop

Notice: Undefined index: product_cat in /home/boilerflash18/public_html/wp-content/themes/boilerflash/woocommerce/loop/result-count.php on line 73

Notice: Undefined index: pa_product-rules in /home/boilerflash18/public_html/wp-content/themes/boilerflash/woocommerce/loop/result-count.php on line 74

Notice: Undefined index: ft in /home/boilerflash18/public_html/wp-content/themes/boilerflash/woocommerce/loop/result-count.php on line 76

Notice: Undefined index: bt in /home/boilerflash18/public_html/wp-content/themes/boilerflash/woocommerce/loop/result-count.php on line 77

Notice: Undefined index: bed in /home/boilerflash18/public_html/wp-content/themes/boilerflash/woocommerce/loop/result-count.php on line 78

Notice: Undefined index: bath in /home/boilerflash18/public_html/wp-content/themes/boilerflash/woocommerce/loop/result-count.php on line 79

Notice: Undefined index: shower in /home/boilerflash18/public_html/wp-content/themes/boilerflash/woocommerce/loop/result-count.php on line 80


Code for this is below

<?php
$filtering = $_REQUEST['filtering'];
$product_cat = $_REQUEST['product_cat'];
$pa_productrules = $_REQUEST['pa_product-rules'];

$ft = $_REQUEST['ft'];
$bt = $_REQUEST['bt'];
$bed = $_REQUEST['bed'];
$bath = $_REQUEST['bath'];
$shower = $_REQUEST['shower'];


$iconslists = array();

$iconslists[0]['icon'] = 'search-icon-'.$ft.'.png';
$iconslists[0]['count'] = '0';
$iconslists[0]['name'] = $ft;

$iconslists[1]['icon'] = 'search-icon-'.$bt.'.png';
$iconslists[1]['count'] = '0';
$iconslists[1]['name'] = $bt;

$iconslists[2]['icon'] = 'search-icon-bed.png';
$iconslists[2]['count'] = $bed;
$iconslists[2]['name'] = 'bedrooms';

$iconslists[3]['icon'] = 'search-icon-bath.png';
$iconslists[3]['count'] = $bath;
$iconslists[3]['name'] = 'bathrooms';

$iconslists[4]['icon'] = 'search-icon-shower.png';
$iconslists[4]['count'] = $shower;
$iconslists[4]['name'] = 'showers';

What I have tried:

Any help would be great. It worked fine on old domain etc but when I have changed the domain name and migrated the site I get these issues. No issues show with debug off but the issue is it doesnt move to the next part of the site as it should.

Thanks In advance.