Wordpress search form and search result through ACF field in custom taxonomy

This should hopefully help you on your way, although I’ve not fully tested it…

The basic search form here which will load the site_url() with appended search query string. You should change this to better reflect your site layout such as <?php site_url( 'search' ); ?> (‘http://website.com/search‘).

Place the Results page code within the results page template (based on the site_url() code above). This will collect all parts (inputs), turn them into a string, then use them in a custom query using the meta_query parameter.

It’s basically saying “Find all products where gc_number equals the search string”. You can then loop through all results and output whatever you need.

If it’s not quite what you’re after, or you need a hand, drop a comment below.

<form role="search" method="get" id="acf-search" action="<?php site_url(); ?>">
    ...

    <input type="text" name="part1" />
    <input type="text" name="part2" />
    <input type="text" name="part3" />

    <input type="submit" value="Search" />
</form>

<?php
// Results page

// Might be worth checking to make sure these exist before doing the query.
$part_1 = $_GET['part1'];
$part_2 = $_GET['part2'];
$part_3 = $_GET['part3'];
$search_string = $part_1 . '-' . $part_2 . '-' . $part_3;

// Get all product categories
$categories = get_terms( 'product_cat' );
$counter = 0;

// Loop through categories
foreach ( $categories as $category ) {

    // Get custom field
    $gc_number = get_field( 'gc_number', $category );

    // If field matches search string, echo name
    if ( $gc_number == $search_string ) {
        // Update counter for use later
        $counter++;
        echo $category->name;
    }
}

// $counter only increases if custom field matches $search_string.
// If still 0 at this point, no matches were found.
if ( $counter == 0 ) {
    echo 'Sorry, no results found';
}
?>

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