How to add a new line if there is a certain phrase in h1?

Question

PHP

There is an online store with the Smarty template engine
in more than 1.5k products there are phrases, in h1, "to order", "for painting" and "leather-covered"

how to add a line to these products, under h1, "manufactured within.. ."?

Answer 1

unload products that have the search phrases in their descriptions

SELECT id, description FROM products WHERE description LIKE '%под заказ%' OR description LIKE '%под покраску%' OR ...

cycle through the selected products and change the values ​​of the description field

$row['description'] = str_replace('</h1>', "</h1>\n<h3><!-- craft time -->изготавливается в течении $craftTime</h3>", $row['description']);