9

我有一些帖子 ID,我想从相同的 url 设置这些帖子的特色图片。

这是我添加的邮政编码:

$catid = get_cat_ID("XX Cat");

$my_post = array(); 
$my_post['post_title'] = $title; 
$my_post['post_content'] = $description; 
$my_post['post_status'] = 'publish'; 
$my_post['post_author'] = 1; 
$my_post['post_category'] = array( $catid ); 

$post_id = wp_insert_post( $my_post );

示例:post_id = 1 我想将特色图片设置为:example.com/image.png

我怎样才能做到这一点?

4

3 回答 3

27

您可以将图像设置为媒体库中的帖子精选缩略图。要在媒体库中添加图像,您需要将其上传到服务器。

试试这个代码:

// Add Featured Image to Post
$image_url        = 'http://s.wordpress.org/style/images/wp-header-logo.png'; // Define the image URL here
$image_name       = 'wp-header-logo.png';
$upload_dir       = wp_upload_dir(); // Set upload folder
$image_data       = file_get_contents($image_url); // Get image data
$unique_file_name = wp_unique_filename( $upload_dir['path'], $image_name ); // Generate unique name
$filename         = basename( $unique_file_name ); // Create image file name

// Check folder permission and define file location
if( wp_mkdir_p( $upload_dir['path'] ) ) {
  $file = $upload_dir['path'] . '/' . $filename;
} else {
  $file = $upload_dir['basedir'] . '/' . $filename;
}

// Create the image  file on the server
file_put_contents( $file, $image_data );

// Check image file type
$wp_filetype = wp_check_filetype( $filename, null );

// Set attachment data
$attachment = array(
    'post_mime_type' => $wp_filetype['type'],
    'post_title'     => sanitize_file_name( $filename ),
    'post_content'   => '',
    'post_status'    => 'inherit'
);

// Create the attachment
$attach_id = wp_insert_attachment( $attachment, $file, $post_id );

// Include image.php
require_once(ABSPATH . 'wp-admin/includes/image.php');

// Define attachment metadata
$attach_data = wp_generate_attachment_metadata( $attach_id, $file );

// Assign metadata to attachment
wp_update_attachment_metadata( $attach_id, $attach_data );

// And finally assign featured image to post
set_post_thumbnail( $post_id, $attach_id );

参考网址: http: //www.wpexplorer.com/wordpress-featured-image-url/

根据您的要求修改:或者该目的忽略 WordPress 标准并将您的所有帖子单张图片上传到您的自定义文件夹中,并将此图片路径或直接外部图片网址添加到帖子中作为额外的属性元字段,当您将在您的主题上显示帖子时,只需在帖子 ID 的帮助下使用您的 img。演示代码:用于设置图像

<?php
    update_post_meta ( 7, 'imgkey', 'www.url.path' );//7 is post id
?>

用于在要显示的主题页面上获取图像

<?php
    $img_value = get_post_meta( get_the_ID(), 'imgkey', true );
?>
<img src="<?php echo $img_value?>">

请注意,如果您是 WordPress 发布自定义元字段的新手,请阅读这篇文章: https
://codex.wordpress.org/Custom_Fields或
关于自定义字段的非官方文章:https ://premium.wpmudev.org/blog/creating-custom-字段-手动

于 2017-01-07T18:37:40.147 回答
17

如果您必须加载图像然后指定为帖子的缩略图,更快的方法是使用 media_sideload_image 然后 set_post_thumbnail

https://developer.wordpress.org/reference/functions/media_sideload_image/

$url     = "http://url-of-the-image.jpg";
$post_id = [post id]
$desc    = "image description";

$image = media_sideload_image( $url, $post_id, $desc,'id' );

set_post_thumbnail( $post_id, $image );
于 2021-01-25T17:12:05.840 回答
0

只是为了补充@Naraj的答案,如果您正在处理外部文件,请记住添加:

require_once(ABSPATH . 'wp-admin/includes/media.php');
require_once(ABSPATH . 'wp-admin/includes/file.php');
require_once(ABSPATH . 'wp-admin/includes/image.php');

如果您不添加,您将收到一条错误消息,指出 media_sideload_image 未定义。

于 2022-01-31T16:54:49.963 回答