Question

我在从函数返回值时遇到了一些麻烦。该函数本身包含一个循环，它从wordpress博客获取并分配一堆变量。我想要做的是返回循环中定义的变量，以便我可以简单地在其他地方回显它们。我需要运行相同的循环，但使用不同的参数，多次，所以他们需要在函数内部以防止任何问题。

我使用wordpress作为CMS - 最终会包含该文件，并且返回的变量将回显填充网站的内容。

这是我的代码：

function recentFeatured3(){

    $args = array( 'category' => 4, 'posts_per_page' => 2, 'post_status' =>  'publish', 'order' => 'DESC' );
    $recent_posts = wp_get_recent_posts( $args );
    foreach( $recent_posts as $recent ){

        $count++;

        ${'featured_title' . $count}=$recent["post_title"];
        ${'featured_post_id' . $count}=$recent["ID"];

        ${'featured_post_' . $count} = get_post(${'featured_post_id' . $count}); 
        ${'featured_content' . $count} = ${'featured_post_' . $count}->post_content;
        ${'featured_date' . $count} = mysql2date('F j, Y', ${'featured_post_' . $count}->post_date);
        ${'featured_excerpt' . $count} = substr(${'featured_content' . $count},0,160).'...';

    }

    return $featured_title1;
    return $featured_title2;
    return $featured_post_id1;
    return $featured_post_id2;
    return $featured_content1;
    return $featured_content2;
    return $featured_date1;
    return $featured_date2;
    return $featured_excerpt1;
    return $featured_excerpt2;

}

echo $featured_title1; //and so on....

如您所见，我只想回显从函数外部的循环定义和创建的变量。我不确定返回是否需要进入循环 - 我已经在内部和外部尝试过，并且都不起作用。该变量也是基于循环计数命名的，因此我不确定如何解决该问题或者是否导致问题。

任何想法或建议将不胜感激！

Answer 1

你不能有这样的多个回报。只执行第一个。收集数组中的值。

function recentFeatured3(){

  $args = array( 'category' => 4, 'posts_per_page' => 2, 'post_status' =>  'publish', 'order' => 'DESC' );
  $recent_posts = wp_get_recent_posts( $args );
  $data = array();
  foreach( $recent_posts as $recent ){

    $count++;

    $data['featured_title' . $count}=$recent["post_title"];
    $data['featured_post_id' . $count}=$recent["ID"];

    $data['featured_post_' . $count] = get_post(${'featured_post_id' . $count}); 
    $data['featured_content' . $count} = ${'featured_post_' . $count}->post_content;
    $data['featured_date' . $count} = mysql2date('F j, Y', ${'featured_post_' . $count}->post_date);
    $data['featured_excerpt' . $count} = substr(${'featured_content' . $count},0,160).'...';

  }

  return $data

}

echo $data['featured_title1']; //and so on....

Answer 2

如果要返回大量信息，则不能使用多个return语句执行此操作。只有第一个被执行，其余的是死代码。您需要做的是创建某种集合（通常在PHP中为Object或Array），将所有数据放入该单个内容中，然后返回（引用）该单个内容。此外，你想要一个集合的集合！对于每个帖子，一组值，并且会有多个帖子。这是一个可能看起来如何的示例，返回一个数组数组：

function recentFeatured3(){
$resultsArray = array(); // you can just write '[]' in PHP >= 5.4

$args = array( 'category' => 4, 'posts_per_page' => 2, 'post_status' =>  'publish', 'order' => 'DESC' );
$recent_posts = wp_get_recent_posts( $args );
foreach( $recent_posts as $recent ){
    $postInfo = array();
    $postInfo['featured_title'] = $recent["post_title"];
    $postInfo['featured_post_id'] = $recent["ID"];
    $postInfo['featured_post'] = get_post(${'featured_post_id' . $count}); 
    $postInfo['featured_content'] = ${'featured_post_' . $count}->post_content;
    $postInfo['featured_date' = mysql2date('F j, Y', ${'featured_post_' . $count}->post_date);
    $postInfo['featured_excerpt'] = substr(${'featured_content' . $count},0,160).'...';
    array_push($resultsArray, postInfo);
}

return $resultsArray;
}

$results = recentFeatured3();
foreach($results as $index=>$postInfo) {
    echo "results for post #".$index;
    foreach($postInfo as $key=>$value) {
         echo $key . " has value " . $value;
    }
}

Answer 3

你不能return超过1次，所以你应该替换为

$arr = array();
foreach( $recent_posts as $recent ){
    $post = array();
    $post['featured_title']=$recent["post_title"];
    $post['featured_post_id']=$recent["ID"];
    $featuredPost = get_post($recent["ID"]); 
    $post['featured_post'] = $featuredPost; 
    $post['featured_content'] = $featuredPost->post_content;
    $post['featured_date'] = $featuredPost->post_date);
    ${'featured_excerpt' . $count} = substr($post['featured_content'],0,160).'...';
    $arr[] = $post;
}

    return $arr;
}

print_r(recentFeatured3());

PHP在循环内从Wordpress返回值

3 个答案: