PHP在循环中向后检查，并使用array_rand（）编写条件以避免连续值

Question

我的解决方案作为答案发布在下面

但是我不会接受我的答案是正确的。我非常感谢有关优化我发布的解决方案的任何帮助或建议。我会接受最有帮助的答案作为正确答案。感谢您的帮助！

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在博客模板中的 wordpress 主题中，我正在使用三种尺寸的特色图片创建帖子预览，小中号和大号。

以下代码可以很好地随机显示不同尺寸的显示，我想避免三个或更多相同尺寸的连续帖子。

也就是说，如果连续有两个“中”，那么下一个应该是小或大，之后可以为后续数组项重新开始随机化。这意味着从 $thumbs 数组中删除“连续”值，然后将其重新添加到下一次迭代中。

if ( $wp_query->have_posts() ) : while ( $wp_query->have_posts() ) : $wp_query->the_post(); 

$thumbsize = get('thumb_size');

$thumbs = array();

$thumbs[0] = get_the_post_thumbnail($post->ID, 'locations-small');
$thumbs[1] = get_the_post_thumbnail($post->ID, 'locations-med');
$thumbs[2] = get_the_post_thumbnail($post->ID, 'locations');

$thumbid = get_post_thumbnail_id($post->ID);

if($thumbsize == 'Small'){
    $thumb = $thumb[0];
} elseif($thumbsize == 'Medium') {
    $thumb = $thumb[1];
} elseif($thumbsize == 'Large') {
    $thumb = $thumb[2];
} else {
    $thumb = $thumbs[array_rand($thumbs)];
}

// so on and so forth

我知道这需要在“if($wp_query)”循环中向后检查两个项目，但我不确定如何执行此操作...

如何使用 array_rand() 编写条件代码以避免连续值？

谢谢！

Answer 1

这是我的解决方案。我使用多个计数器来检查连续值，并在达到“连续限制”后重置计数器。

如果有人对如何进一步优化此代码有任何建议，我当然会接受最有帮助的回答作为正确答案。谢谢！

// three counters for medium, small and large
$ism = 0;
$im = 0;
$il = 0;

$args = array( 
    'post_type' => 'property',
    'paged' => $paged
);

query_posts( $args ); 

if ( $wp_query->have_posts() ) : while ( $wp_query->have_posts() ) : $wp_query->the_post(); 
    $thumbsize = get('thumb_size');

    $thumbs = array();

    $thumbsmall = get_the_post_thumbnail($post->ID, 'locations-small');
    $thumbmed = get_the_post_thumbnail($post->ID, 'locations-med');
    $thumblarge = get_the_post_thumbnail($post->ID, 'locations');

    // If no consecutive sizes have been counted, include all sizes in the array
    if($ism != 2 && $im != 2 && $il != 2) {
        $thumbs[0] = $thumbsmall;
        $thumbs[1] = $thumbmed;
        $thumbs[2] = $thumblarge;
    }

    $thumbid = get_post_thumbnail_id($post->ID);

    if($thumbsize == 'Small'){
        $thumb = $thumb[0];
    } elseif($thumbsize == 'Medium') {
        $thumb = $thumb[1];
    } elseif($thumbsize == 'Large') {
        $thumb = $thumb[2];
    } else {
        $thumb = $thumbs[array_rand($thumbs)];
    }

    // Check if each thumb size has been used and if that size occured in the previous iteration, if so, increment the counter, else reset the count to zero
    if($thumb == $thumbsmall && $ism <= 1) {$ism++;} else {$ism = 0;}
    if($thumb == $thumbmed && $im <= 1) {$im++;} else {$im = 0;}
    if($thumb == $thumblarge && $il <= 1) {$il++;} else {$il = 0;}

    // If there are two consecutive sizes, remove one item from the array and reset the counter to zero
    if($ism == 2) {
        $thumbs[0] = $thumblarge;
        $thumbs[1] = $thumbmed;
        $ism = 0;
    }

    if($im == 2) {
        $thumbs[0] = $thumbsmall;
        $thumbs[1] = $thumblarge;
        $im = 0;
    }

    if($il == 2) {
        $thumbs[0] = $thumbmed;
        $thumbs[1] = $thumbsmall;
        $il = 0;
    }

    // So on and so forth