Warning: Uninitialized string offset 0

I created function that hoocks in to header of page to get ids of products on taxonomy page

function woocommerce_acf_head_insert() {
		$ids_list = array(0,0);
		$count = 0;
		while(have_posts() and $count < 2){
		the_post();
		$tmp = get_the_ID();  $ids_list[$count] = $tmp; $count += 1;	 }

		// Sort array from lowest to highest
		sort($ids_list);
		echo $ids_list[0] . " " . $ids_list[1];

			$value = get_field("resolution", $ids_list[0]); 
			echo $value; 


		if(!empty($ids_list[0])){
		$value = get_field("resolution", $ids_list[1]); 
		echo $value; 
		}
	} 

Then i want to register function to create short code to use this ids extracted with function in header to call ACF custom field of “x product” wher x is number in array of extracted ids

add_shortcode( 'acf_field', 'woocommerce_acf_shortcode' );

function woocommerce_acf_shortcode( $atts, $ids_list) {
  $atts = shortcode_atts( array(
    'field_name' => '',
    'cont' => '',
  ), $atts, 'the_field' );

  $field_name = $atts['field_name'];
  $cont = $atts['cont'];
  $id = $ids_list[$cont];
  ob_start();
  echo $id;
  the_field( $field_name, $id );
  return ob_get_clean();
}

I use short code [acf_field field_name=”waterproof” cont=”0″] But i get warning : Warning: Uninitialized string offset 0 in \public\wp-content\plugins\Woocomerce ACF\Woocomerce ACF.php on line 310
In line 310 is:

  $id = $ids_list[$cont];

• This topic was modified 3 years, 4 months ago by termi.