Issue displaying taxonomies names and links: not a string?

• Luca_R

• November 5, 2020 at 10:39 pm

Hello, I am trying to display a simple list of custom taxonomies in my post via shortcode, but I get this warning:
ltrim() expects parameter 1 to be string, object given…

In the backend i created an ACF form with Taxonomy field; main settings:
name: custom_tax_fieldname
appearance: checkboxes
save terms: yes
return value: term object

In my php I added this code, borrowed and adapted from the documentation: https://www.advancedcustomfields.com/resources/taxonomy/

$custom_taxonomies = get_field('custom_tax_fieldname');
if( $custom_taxonomies ) {
	foreach( $custom_taxonomies as $custom_taxonomy ){
        echo "<a href='" . esc_url( get_term_link( $custom_taxonomy ) ) . "'>" . esc_html( $custom_taxonomy->name ) . "</a>";
		if (next( $custom_taxonomies )) {echo ', ';} 
 }
}

but I get this warning multiple times (one for every taxonomy I am supposed to see): Warning: ltrim() expects parameter 1 to be string, object given in home/wp-includes/formatting.php on line 4309

I don’t know what am I doing wrong, can someone help?
Thank you very much in advance

• Luca_R

• November 5, 2020 at 10:47 pm

Update:
if I try to echo only my term name it appers completely empty,
if I try to echo only my term link, the warning “ltrim() expects parameter 1 to be string” appears

• Luca_R

• November 6, 2020 at 10:55 am

For anyone who needs it, my error was that I had to use
get_term_link(term-slug, taxonomy-slug) with the term slug and the taxonomy slug, while I was using the ID and did not use the taxonomy slug.

So the final code I used is:

$terms = get_field('acf_tax_fieldname');
if( $terms ) {
     foreach( $terms as $term ) {
		 $term_name = get_term( $term )->name;
		 $term_slug = get_term( $term )->slug;
		 $term_link = get_term_link( $term_slug , 'wp_tax_slug' );
		 echo "<a href='" . $term_link . "'>" . $term_name . "</a>";
	}    
}