real<br />
<b>Notice</b>:  Undefined index: tags in <b>/development/shopify-data-mining/Inventory-while-instock.php</b> on line <b>20</b><br />
<br />
<b>Fatal error</b>:  Uncaught TypeError: Argument 1 passed to str_contains() must be of the type string, null given, called in /development/shopify-data-mining/Inventory-while-instock.php on line 21 and defined in /development/shopify-data-mining/vendor/symfony/polyfill-php80/bootstrap.php:29
Stack trace:
#0 /development/shopify-data-mining/Inventory-while-instock.php(21): str_contains()
#1 {main}
  thrown in <b>/development/shopify-data-mining/vendor/symfony/polyfill-php80/bootstrap.php</b> on line <b>29</b><br />