Sorry forgot to show you what I have tried so far. I found someone asking a similar question in forum https://support.advancedcustomfields.com/forums/topic/checkbox-how-to-display-all-item-as-check-uncheck/
I used the code in the reply marked as solved, but are getting errors.
Here’s my PHP code:
<?php
$value = get_field('service_options');
$field = get_field_object('service_options');
$choices = $field['choices'];
if( $field ) :
?>
<ul>
<?php
foreach($choices as $value => $label) :
if( in_array($value, $values) ) :
$class = ' class="selected"';
else :
$class = '';
endif;
echo '<li' . $class . '>' . $label . '</li>';
endforeach;
?>
</ul>
<?php endif; ?>
But I’m getting the following warning for each option:
Warning
: in_array() expects parameter 2 to be array, null given in …
In addition to the warning on each item, , the class selected isn’t being added to the options that were selected.
