Question

我正在尝试使用此方法获取帖子的所有图片：

$args = array(
    'post_type' => 'attachment',
    'numberposts' => -1,
    'post_status' => null,
    'post_parent' => $post->ID
);  

$attachments = get_posts( $args );
    if ( $attachments ) {
        foreach ( $attachments as $attachment ) {
            $images[] = wp_get_attachment_image_src( $attachment->ID, ATTACHMENT_IMAGE_SIZE );
        }
        return $images;
    }

不幸的是，这将使所有图像上传，而不仅仅是与当前帖子相关的图像。我发现这个post使用* get_children *，但它也不起作用。任何想法？

ps：我在创建/更新帖子时运行代码

Answer 1

你可以尝试

<?php 
        $attachments = get_posts( array(
            'post_type' => 'attachment',
            'posts_per_page' => -1,
            'post_parent' => $post->ID,             
        ) );

        if ( $attachments ) {
            foreach ( $attachments as $attachment ) {
                $class = "post-attachment mime-" . sanitize_title( $attachment->post_mime_type );
                $thumbimg = wp_get_attachment_link( $attachment->ID, 'thumbnail-size', true );
                echo '<li class="' . $class . ' data-design-thumbnail">' . $thumbimg . '</li>';
            }

        }

?>

了解更多here。

确保$ post-＆gt; ID不为空。如果仍然无效，您可以尝试从页面/帖子内容中提取图像。更多详情here

Answer 2

在创建/更新帖子/页面后，在functions.php中添加一个钩子，然后将其包装在该函数内，如下所示

add_action( 'save_post', 'after_post_save' );
function after_post_save( $post_id ) {
    if ( 'post' == get_post_type($post_id) ) // check if this is a post
    {
        $args = array(
            'post_type' => 'attachment',
            'numberposts' => -1,
            'post_status' => null,
            'post_parent' => $post_id
        );

        $attachments = get_posts( $args );
        if ( $attachments ) {
            foreach ( $attachments as $attachment ) {
                $images[] = wp_get_attachment_image_src( $attachment->ID, ATTACHMENT_IMAGE_SIZE );
            }
            return $images; // End of function and nothing happens
        }
    }
}

请记住，除非您对图片执行某些操作，否则在函数末尾返回$images数组基本上不会做任何事情。

注意： wp_get_attachment_image_src函数返回一个包含

的数组

[0] => url // the src of image
[1] => width // the width
[2] => height // the height

因此，在$images数组中，它将包含类似

的内容

array(
    [0] => array([0] => url, [1] => width, [2] => height), // first image
    [1] => array([0] => url, [1] => width, 2] => height) // second image
);

Wordpress：获取当前帖子的图片

2 个答案: