在php中为每个循环选择x个项目？

Question

I dont know if this is possible, but im trying to get pagination from a get_pages() function of Wordpress since i need those pages being echo with different classes or inside some div so I can manage them with Javascript later to match the desire template.

So far I have this to echo the content:

$pages = get_pages('child_of='.$post->ID.'&sort_column=post_date&sort_order=desc');
            $i =0;
            foreach($pages as $page)
            {
                $content = $page->post_content;
                if(!$content)
                    continue;
                $i++;
                $content = apply_filters('the_content', $content);
                $doc = new DOMDocument();
                $doc->loadHTML($content);
                $xpath = new DOMXPath($doc);
                $imagesrc = $xpath->evaluate("string(//img/@src)");
                $imagehref = $xpath->evaluate("string(//a/@href)");

                for($i = 0; $i < count($content); $i+=5) {
                    echo "<li><a id='item-$i' href='$imagehref'><img src='$imagesrc'/></a></li>\n";
                    for($i = 5; $i < count($content); $i+=18) {
                        echo "more";
                    }
                }

So right now i do get all items no matter if there is 10 or 50, but what i want it is to put them in blocks of 8, is that possible to do inside a for each? or there is another way to do it?

Note I need to plit large set of posts into blocks of 8

any help will be really appreciated thanks :)

Answer 1

An alternative to @aelfric5578's answer is to use array_chunk to break the array into the pieces you need. You could break the original $pages array or generate an array in the foreach and break that, whichever works best for you but I'd probably break the $pages array. Here is an example using the original $pages .

$blocks = array_chunk($pages, 8);

The benefit is going to be readability and maintainability. Since you already have an iterator-- and maybe should have maybe two, you seem to be using the same variable name twice-- it could get confusing to add more counters.

Answer 2

You need a separate counter. Since you already have $i you can use a conditional and the modulo operator. $i % 8 returns zero if $i is divisible by 8 and the remainder of that division otherwise.

So, if $i % 8 == 0 , start your grouping. Assuming you plan on grouping things with a <div> or something like that. You can close your grouping after $i % 8 == 7 at the end of your for loop.

However, it seems you're setting $i twice. Is there a reason for this? For my solution to work, you would need to use a different variable for the inner for loop.