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Add dropdown to search by all categories or define a specific category

Adding this snippet to your wordpress theme will allow users to search your website but also allow them to select a specific category as well. By modifying the arguments within "wp_dropdown_categories" you can exclude categories or even specify the specific order of categories within the list. The following options are available:


show_option_all, show_option_none, orderby, order, show_count, hide_empty, child_of, exclude, echo, selected, hierarchical, name, id, class, depth, tab_index, taxonomy, hide_if_empty

wordpress codex


Code Snippet:


<form role="search" method="get" id="searchform" action="<?php bloginfo('siteurl'); ?>">
<div>
<label class="screen-reader-text" for="s">Search for:</label>
<input type="text" value="" name="s" id="s" />
in <?php wp_dropdown_categories( 'show_option_all=All Categories' ); ?>
<input type="submit" id="searchsubmit" value="Search" />
</div>
</form>

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