WordPress将Posts foreach循环中的最后一个项目作为目标

Question

我想在foreach循环上定位最后一个Item，并在其中添加一些类。 那可能吗？

这是我的代码：

<?php
$args = array(
    'posts_per_page'  => -1,
    'post_type'       => 'art',
    'cat'             =>  '6',
    'orderby'         => 'name',
    'order'           => 'ASC',
    'post_status'     => 'publish'
);
$posts_array = get_posts( $args );

foreach($posts_array as $post) : setup_postdata($post);
if ( has_post_thumbnail() ) {
    $title = str_replace(" ", "&nbsp;", get_the_title());
    $thumb = get_the_post_thumbnail($post->ID, 'exhibition-pre');
    if (has_post_thumbnail()) { ?>
        <div class="grid-3 grid-tablet-4 grid-mobile-6 artythumbs">
                <a href="<?php echo get_permalink() ?>">
                    <?php echo get_the_post_thumbnail($page->ID, 'art-thumb', array('class' =>       'max-img ')); ?>
                    <div class="imgcont"><?php echo the_title();?></div>
                </a>

        </div>
    <?php
    }
}
endforeach; ?>
<?php wp_reset_postdata(); ?>

我最后希望有：

<div class="grid-3 grid-tablet-4 grid-mobile-6 artythumbs>...</div>
<div class="grid-3 grid-tablet-4 grid-mobile-6 artythumbs>...</div>
<div class="grid-3 grid-tablet-4 grid-mobile-6 artythumbs>...</div>
<div class="grid-3 grid-tablet-4 grid-mobile-6 artythumbs CLEAR-Tablet>...</div>
<div class="grid-3 grid-tablet-4 grid-mobile-6 artythumbs CLEAR-Screen>...</div>
<div class="grid-3 grid-tablet-4 grid-mobile-6 artythumbs>...</div>
<div class="grid-3 grid-tablet-4 grid-mobile-6 artythumbs>...</div>
<div class="grid-3 grid-tablet-4 grid-mobile-6 artythumbs>...</div>
<div class="grid-3 grid-tablet-4 grid-mobile-6 artythumbs CLEAR-Tablet>...</div>
<div class="grid-3 grid-tablet-4 grid-mobile-6 artythumbs CLEAR-Screen>...</div>

等等。

Answer 1

如前所述，您可能可以通过CSS执行此操作，但是如果您想要服务器端解决方案，请尝试以下操作：

首先要注意两件事：

1. 考虑使用WP_Query代替get_posts()进行此类操作，因为这是推荐的最佳实践
2. 由于某种原因，您需要两次检查特色图片。

因此，如何在循环中每第4/5个项目附加一个类。

//Step 1: Outside the loop setup a counter

$i = 1;

foreach($posts_array as $post) :

    setup_postdata($post);

    //Step 2: Once we're in the loop, setup our extra classes
    $classes = ' ';

    //for multiples of 4 
    if ( $i % 4 == 0) {
        $classes .= ' CLEAR-Tablet';
    }

    //for multiples of 5
    if ( $i % 5 == 0) {
        $classes .= ' CLEAR-Screen';
    }

    if ( has_post_thumbnail() ) {
        $title = str_replace(" ", " ", get_the_title());
        $thumb = get_the_post_thumbnail($post->ID, 'exhibition-pre');



        //Step 3: Include our extra classes
        ?>

            <div class="grid-3 grid-tablet-4 grid-mobile-6 artythumbs <?php echo $classes; ?>">

                <a href="<?php echo get_permalink() ?>">
                    <?php echo get_the_post_thumbnail($page->ID, 'art-thumb', array('class' =>       'max-img ')); ?>
                    <div class="imgcont"><?php echo the_title();?></div>
                </a>

            </div>

        <?php

        //Step 4: Increment the counter (you might want to do this outside the if but I think it's better here.
        $i++;
    }

endforeach; ?>

<?php wp_reset_postdata(); ?>

1. 在循环外设置一个计数器，我从1开始，因为我们从1开始对行进行计数。
2. 使用模运算符，我们可以判断我们是4还是5的倍数，并适当地设置一个类变量。
3. 打印出class变量
4. 增加计数器