Conditional operator OR not working with custom fields

Question

OR operator is not working for both conditions, only check first value if true then code executed and if first is false then not check 2nd condition and return else output.

I also try with LIKE compare, but then it's check custom fields value with all other values and if This CF value's contain by any other string CF value then it's become true.

<?php
    $posts = get_posts(array(
    'numberposts' => 14,
    'post_type' => 'post',
    'post_status' => 'publish',
    'category_name' => 'travel',
    'meta_query' => array(
        'relation' => 'OR',
          array(
            'key'   => 'Swimming',
            'value' => get_post_meta(get_the_ID(), 'Swimming',true),
            'compare' => 'IN'
        ),
      array(
            'key'   => 'Boat', 
            'value' => get_post_meta(get_the_ID(), 'Boat',true),
            'compare' => 'IN'
        ))));
        if($posts) { 
             foreach($posts as $post) {
?>
 <?php the_title(); ?> 
    <?php 
    }  
}
else { 
?>  
<?php echo "No Update";
}
?>

Answer 1

The problem is that you used OR, specifically the human verbal colloquial understanding, not the logical definition. What you actually meant was AND.

Here's a table demonstrating what happens to A and B for each comparison:

A	B	AND	OR	XOR	===
false	false	❌	❌	❌	✅
true	true	✅	✅	❌	✅
false	true	❌	✅	✅	❌
true	false	❌	✅	✅	❌

• OR means if any of the values are true, e.g. if one is false and the other is true
• XOR means if one of the values is true ( but not both at the same time )
• AND means if all/both of the values are true, and none are false
• ==means if both of the values are equivalent e.g. true and "true" are equivalent
• ===/EQUAL means if both of the values are exactly the same