I Need to build an interface with a filter set (a list of checkboxes) that the user can check and click 'filter' to search with in 1 custom post-type for posts with matching terms (there are 3 custom taxonomies with each an unlimited amount of terms).
How to go about this? I am thinking to code the following:
I displayed the GUI filterlist like this (x3 because there are 3 taxonomies):
<form action="/filter-result" method="get">
<?php $terms = get_terms( array(
'taxonomy' => 'taxonomy-name',
'hide_empty' => false,
) );
foreach($terms as $term) {
echo '<label><input type="checkbox" name="taxonomy-name" value="' . $term->name .'">' . $term->name . '</label>';
} ?>
<input type="submit" value="Filter">
</form>
I end up on the /filter-result page with an URL with more than one parameter that all have the same name:
filter-result/?taxonomya=term1&taxonomya=term2&taxonomyb=term9
My plan is to GET all the parameters- I don't know how because there are parameters with the same name- and then build an SQL out of the filtered data.
I Need to build an interface with a filter set (a list of checkboxes) that the user can check and click 'filter' to search with in 1 custom post-type for posts with matching terms (there are 3 custom taxonomies with each an unlimited amount of terms).
How to go about this? I am thinking to code the following:
I displayed the GUI filterlist like this (x3 because there are 3 taxonomies):
<form action="/filter-result" method="get">
<?php $terms = get_terms( array(
'taxonomy' => 'taxonomy-name',
'hide_empty' => false,
) );
foreach($terms as $term) {
echo '<label><input type="checkbox" name="taxonomy-name" value="' . $term->name .'">' . $term->name . '</label>';
} ?>
<input type="submit" value="Filter">
</form>
I end up on the /filter-result page with an URL with more than one parameter that all have the same name:
filter-result/?taxonomya=term1&taxonomya=term2&taxonomyb=term9
My plan is to GET all the parameters- I don't know how because there are parameters with the same name- and then build an SQL out of the filtered data.
Share Improve this question asked Jan 19, 2019 at 20:15 LudoLudo 612 silver badges11 bronze badges2 Answers
Reset to default 1Add brackets to the input names:
<label><input type="checkbox" name="taxonomy-name[]" value="term">term</label>
It will be automatically converted to an array:
if( isset( $_GET['taxonomy-name'] ) ){
foreach( $_GET['taxonomy-name'] as $term ){
echo $term;
}
}
As an addition to Milo's answer for the sake of completeness, this is how I formed the args for the sql using the URL parameters:
$query = new WP_Query( array(
'posts_per_page' => -1,
'post_type' => 'mycustomposttype',
'orderby' => 'title',
'order' => 'ASC',
'tax_query' => array(
'relationship' => 'AND',
array(
'taxonomy' => 'mytaxonomy1',
'field' => 'slug',
'terms' => $_GET['mytaxonomy1'],
'operator' => 'AND',
),
array(
'taxonomy' => 'mytaxonomy2',
'field' => 'slug',
'terms' => $_GET['mytaxonomy2'],
'operator' => 'AND',
),
array(
'taxonomy' => 'mytaxonomy3',
'field' => 'slug',
'terms' => $_GET['mytaxonomy3'],
'operator' => 'AND',
),
),
) );
if ( $query->have_posts() ) {
while ( $query->have_posts() ) {
}
}
See for more elaboration this question. I also found this a great resource for making the WP_Query: WP_Query Arguments: Taxonomies