I apologize in advance if I’m not understanding your question correctly.
So you have a custom post type (produktark) with a checkbox field in it. Then on another page, you have a ACF to select which checkbox value from the CPT you want to query by?
Assuming that vis_produktark_fra is the field key for the field on the page you want to display the custom posts on, then you should be able to use get_field() rather than the_field(). the_field echos the value, which you don’t want to do.
So assuming I’m understanding you correctly, your code could look like:
<?php
$vis_produktark_fra = get_field('vis_produktark_fra');
// args
$args = array(
'post_type' => 'produktark',
'posts_per_page' => -1,
'meta_query' => array(
array(
'key' => 'produkttyp',
'compare' => 'LIKE',
'value' => $vis_produktark_fra
)
)
);
// get results
$the_query = new WP_Query( $args );
// The Loop
?>
OR
<?php
// args
$args = array(
'post_type' => 'produktark',
'posts_per_page' => -1,
'meta_query' => array(
array(
'key' => 'produkttyp',
'compare' => 'LIKE',
'value' => get_field('vis_produktark_fra')
)
)
);
// get results
$the_query = new WP_Query( $args );
// The Loop
?>
this is basically the same thing in my first code snipped
