- array_slice: documentation ( source)
- print_r: documentation ( source)
- array_merge: documentation ( source)
<?php
$all_blogs = [1,2,3];
$left_blogs = [1];
$all_blogs_total = count($all_blogs);
$left_blogs_total = count($left_blogs);
if (($diff = $left_blogs_total - $left_blogs_total) >0) {
$left_blogs = array_merge($left_blogs, array_slice($all_blogs, 0, $diff));
}
print_r($left_blogs);