如何在wordpress中添加自定义搜索？

I am using a search icon on home page. Onclick this icon opens a overlay which has a search form.

Issue is how to link this form to wordpress file to search the query?

Check that the overlay form is wrapped with the below html

<form method="get" id="searchform" class="searchform" action="<?php echo esc_url( home_url( '/' ) ); ?>">


</form>

that means the input box should within the and on above code.

Note : the name of the inputbox should be "s" so full code will look like :

<form method="get" id="searchform" class="searchform" action="<?php echo esc_url( home_url( '/' ) ); ?>">
<input type="text" value="<?php echo get_search_query(); ?>" name="s" id="s" />                     

</form>

Hope it will work for you