Warning: urldecode() when using Taxonomy field type

(@ameraz)

I’ve set up an ACF to retrieve an array of selected categories with which then I query posts to display a list of the latest 5 entries.

Field Name: categoria
Field Type: Taxonomy
Taxonomy: Categories
Required: No
Field Type: Multiple Values > Checkbox
Allow Null: No
Load value based on the post’s terms and update the post’s terms on save: Off
Return Value: Term ID

The code I’m using to do the query is as following:

<?php $cat = get_field('categoria'); $args = array( 'numberposts' => 5, 'category' => $cat); $postslist = get_posts($args);
	foreach ($postslist as $post) :  setup_postdata($post); ?>
		<div>
			<h3><a href="<?php the_permalink(); ?>"><?php the_title(); ?></a></h3>
			<span><?php the_time('d/m/y');  ?> | <?php the_category(', ') ?>  </span>
		</div>
	<?php endforeach; ?>

It works “fine” if there are no categories selected, but if one or more categories are selected then the following error shows up:

Warning: urldecode() expects parameter 1 to be string, array given in …/wp-includes/query.php on line 1735

Line 1735 is: $q['cat'] = ''.urldecode($q['cat']).'';

… inside this if conditional:

// Category stuff
if ( !empty($q['cat']) && '0' != $q['cat'] && !$this->is_singular && $this->query_vars_changed ) {
	$q['cat'] = ''.urldecode($q['cat']).'';
	$q['cat'] = addslashes_gpc($q['cat']);
	$cat_array = preg_split('/[,\s]+/', $q['cat']);
	$q['cat'] = '';
	$req_cats = array();
	foreach ( (array) $cat_array as $cat ) {
	$cat = intval($cat);
	$req_cats[] = $cat;
	$in = ($cat > 0);
	$cat = abs($cat);
	if ( $in ) {
	$q['category__in'][] = $cat;
	$q['category__in'] = array_merge( $q['category__in'], get_term_children($cat, 'category') );
} else {
	$q['category__not_in'][] = $cat;
	$q['category__not_in'] = array_merge( $q['category__not_in'], get_term_children($cat, 'category') );
	}
}
$q['cat'] = implode(',', $req_cats);
}

Any help would very much appreciated!

http://wordpress.org/extend/plugins/advanced-custom-fields/

Viewing 3 replies - 1 through 3 (of 3 total)

Ciro Urdaneta
(@curdaneta)

10 years, 10 months ago

Same problem here
Works perfecto on local environment but fails on server using
$special_offers_args = array(
‘posts_per_page’ => (int) get_option(’boutique_special_offers_numposts’),
‘cat’ => array(6,7,8,9),
‘orderby’ => ‘rand’,
‘exclude’ => ’10’,
);

Any help?
aculvi
(@aculvi)

10 years, 6 months ago
‘cat’ not array is string.
```
$cats=wp_get_post_categories(get_the_ID());

if(count($cats)>1){
   foreach($cats as $cat){
	$strcats=$cat.",";
   }
} else {
   $strcats=$cats[0];
}

$args = array("widget_title" => "",					"thumbnail_width" => "92",					"thumbnail_height" => "92",					"category_include" => $strcats,
"vf_allposts" => "yes",
"vf_everything" => "no");
```
otta88sun
(@otta88sun)

10 years, 2 months ago

i had same problem too passing at ‘cat’ array or integer.
I solved passing string.
Them could switch it to an array ;D