Ordering WP_Query results - php

Question

The below query works if I manually assign the meta value like so 'meta_value' => '4-5', but I need it to return posts for each of the $cartArr values. How can something like that be done?
<ul id="order-box" class="list-group">';
print_r($cartArr); //Array ( [0] => 3-6 [1] => 4-5 )
function query_group_by_filter($groupby){
global $wpdb;
return $wpdb->postmeta . '.meta_key ';
}
add_filter('posts_groupby', 'query_group_by_filter');
$the_query = new WP_Query(array(
'post_type' => 'clasa',
'post_status' => 'publish',
'meta_key' => 'twin_id',
'meta_value' => '4-5'
)
);
remove_filter('posts_groupby', 'query_group_by_filter');
if ( $the_query->have_posts() ) {
while ( $the_query->have_posts() ) {
$the_query->the_post();
echo '<li class="list-group-item" id="remli-'.$post->ID.'">' . get_the_title() . '<a class="right remove" id="remove-'.get_post_meta($post->ID, 'twin_id', true).'" href="#">x</a>';
}
} else {
// no posts found
}
/* Restore original Post Data */
//wp_reset_postdata();
echo '</ul>';

Answer 1

Need to add a foreach loop. like foreach($cartArr as $cartArrr) which is mentioned in bellow line. If working please vote me.
<ul id="order-box" class="list-group">';
<?php
print_r($cartArr); //Array ( [0] => 3-6 [1] => 4-5 )
function query_group_by_filter($groupby){
global $wpdb;
return $wpdb->postmeta . '.meta_key ';
}
add_filter('posts_groupby', 'query_group_by_filter');
foreach($cartArr as $cartArrr) {
$the_query = new WP_Query(array(
'post_type' => 'clasa',
'post_status' => 'publish',
'meta_key' => 'twin_id',
'meta_value' => $cartArrr
)
);
remove_filter('posts_groupby', 'query_group_by_filter');
if ( $the_query->have_posts() ) {
while ( $the_query->have_posts() ) {
$the_query->the_post();
echo '<li class="list-group-item" id="remli-'.$post->ID.'">' . get_the_title() . '<a class="right remove" id="remove-'.get_post_meta($post->ID, 'twin_id', true).'" href="#">x</a>';
}
} else {
// no posts found
}
/* Restore original Post Data */
//wp_reset_postdata();
}
echo '</ul>';