Implementing a Search Form in WordPress

A note on how to implement a search form anywhere you like in WordPress using the WordPress API the_search_query(); in PHP language. Write the PHP as follows.

<form action="/" method="get">
    <input type="text" name="s" id="search" placeholder="Please enter words to search." value="<?php the_search_query(); ?>" />
</form>

I think it’s good to place it right after the body tag or something.