获取一个仅包含附加图像的帖子ID的数组

时间：2014-09-23 作者：AsteriskMMT

我需要将所有附加到帖子的图像数组放入一个自定义字段中，以便使用模板的现有功能动态显示它们。

我已经非常接近了，并且成功地设置了自定义元字段的值_et_used_images 返回的数组内容get_children, 我只需要一些帮助来获取从get\\u children转换/清理返回的值，以便只包括图像的post ID，而不是像我现在得到的那样包括整个图像对象：

这是我正在使用的代码。我曾尝试使用foreach循环添加到$get\\u children\\u数组[]，但我丢失了一些内容，只是返回到了它的工作位置，但返回了所有信息，而不仅仅是posid。（末尾返回的数组示例）。

            if ( \'thumbnail\' == $column_name ) {
            // thumbnail of WP 2.9
            $thumbnail_id = get_post_meta( $post_id, \'_thumbnail_id\', true );
            // image from gallery
            $attachments = get_children( array(\'post_parent\' => $post_id, \'post_type\' => \'attachment\', \'post_mime_type\' => \'image\') );

            if ($thumbnail_id)
                $thumb = wp_get_attachment_image( $thumbnail_id, array($width, $height), true );
            elseif ($attachments) {
        //Set value of et_images via attached posts.


                foreach ( $attachments as $attachment_id => $attachment ) {
                    $thumb = wp_get_attachment_image( $attachment_id, array($width, $height), true );
                }

            }
                if ( isset($thumb) && $thumb ) {
                    echo $thumb;
                //update_post_meta($post_id, \'_thumbnail_id\', $attachment_id); //Uncomment to generate thumbnails from attached media.
                update_post_meta($post_id, \'_et_used_images\', $attachments); 


                } else {
                    echo __(\'None\');
                }
        }
}
返回的数组示例：

a:18:{i:897;O:7:"WP_Post":24:{s:2:"ID";i:897;s:11:"post_author";s:1:"3";s:9:"post_date";s:19:"2011-08-12 05:53:33";s:13:"post_date_gmt";s:19:"2011-08-12 05:53:33";s:12:"post_content";s:153:"A grand home located in Point Loma required a grand landscaping to complement the site. this was achieved with the site planting and landscape features. ";s:10:"post_title";s:33:"1-landscape-design-point-loma-job";s:12:"post_excerpt";s:0:"";s:11:"post_status";s:7:"inherit";s:14:"comment_status";s:4:"open";s:11:"ping_status";s:4:"open";s:13:"post_password";s:0:"";s:9:"post_name";s:35:"1-landscape-design-point-loma-job-3";s:7:"to_ping";s:0:"";s:6:"pinged";s:0:"";s:13:"post_modified";s:19:"2011-08-12 05:53:33";s:17:"post_modified_gmt";s:19:"2011-08-12 05:53:33";s:21:"post_content_filtered";s:0:"";s:11:"post_parent";i:713;s:4:"guid";s:95:"http://example.website.com/wp-content/uploads/2011/07/1-landscape-design-point-loma-job1.jpg";s:10:"menu_order";i:2;s:9:"post_type";s:10:"attachment";s:14:"post_mime_type";s:10:"image/jpeg";s:13:"comment_count";s:1:"0";s:6:"filter";s:3:"raw";}i:896;O:7:}}

3 个回复
最合适的回答,由SO网友:AsteriskMMT 整理而成

好的，所以我最终选择了一条完全不同的路线，并且有了一个很好的工作解决方案

function update_images_meta( $object_id ) {
    // Get the post using its ID
    $post = get_post( $object_id );

    // determine if we are dealing with a post (a parent) or an attachment (a child)
    switch( $post->post_type ){
        case \'attachment\':
            $post_id = $post->parent;
            break;

        default:
            $post_id = $post->ID;
            break;
    }

    if($post_id) {
        // Get all the image attachments for the post
        $param = array(
                \'post_parent\'       => $post_id, 
                \'post_type\'         => \'attachment\', 
                \'post_mime_type\'    => \'image\'
        );

        $attachments = get_children(  $param );

        // Initialize the array
        $atts = array();

        // Fill the array with attachment ID\'s
        foreach($attachments as $attachment)
            $atts[] = $attachment->ID;

        // Disable this hook which was overwrinting our changes
        remove_action( \'save_post\', \'flexible_save_details\', 10 );

        // Update the post\'s meta field with the attachment arrays
        update_post_meta( $post_id, \'_et_used_images\', $atts );

    }
}

SO网友:Domain

以下代码应该适合您，

$images = get_children( array(\'post_parent\' => $post_id, \'post_type\' => \'attachment\', \'post_mime_type\' => \'image\') );
$image_ids = array();
if($images){
   foreach( $images as $imageID => $imagePost ){
      array_push($image_ids, $imageID);
   }
}
数组$image\\u id将为您获取图像ID。

SO网友:Nicolai Grossherr

您可以使用fields 参数的值ids 就是为了得到这些。您可以将其用于get_children(), 它的工作原理类似于或是get_posts(), 这也是包装器WP_Query. 因此，您可以：

// this:
$children_images_ids = get_children(
    array(
        \'post_parent\'    => get_the_ID(),
        \'post_status\'    => \'inherit\',
        \'post_type\'      => \'attachment\',
        \'post_mime_type\' => \'image\',
        \'fields\'         => \'ids\'
    )
);

// or this:
$children_images_ids = get_posts(
    array(
        \'post_parent\'    => get_the_ID(),
        \'post_status\'    => \'inherit\',
        \'post_type\'      => \'attachment\',
        \'post_mime_type\' => \'image\',
        \'fields\'         => \'ids\'
    )
);

// or this:
$children_images_obj = new WP_Query(
    array(
        \'post_parent\'    => get_the_ID(),
        \'post_status\'    => \'inherit\',
        \'post_type\'      => \'attachment\',
        \'post_mime_type\' => \'image\',
        \'fields\'         => \'ids\'
    )
);
$children_images_ids = $children_images_obj->posts;
在任何情况下$children_images_ids 将已经是一个ID数组，看起来有点像这样：

Array
(
    [0] => 123
    [1] => 456
    [2] => 789
)

结束
标签： images   小码农  

相关推荐

Removing blog page images

我有我的blog page here 然而，在我创建的一个网站上，我不太明白在哪里可以找到代码来去除我孩子主题上的图像。我使用的是2010年的代码，我已经设置了自己的博客模板页面，但它不起作用，所以我显然编辑了错误的文件。所以不是循环。php我想要编辑的文件，以便在主博客页面上删除这些图像？<?php /* How to display all other posts. */ ?> <?php else : ?> <div i