Recently, I needed a search form that searched and resulted in posts from a specific category. I solved it by adding a hidden input field to my searchform.php file as follows:
Note, in the code above, I am searching posts in the category whose id is 21.
Pretty nifty, eh?
Thanks to WP Explorer for the idea.
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I have tried this , but it shows only 1 post of this category
how can i resolve this ?
I am guessing that you have a query running on search.php that displays only 1 post or that your “Settings”->”Reading” are set to display 1 post.