我有一些帖子ID,我想设置这些帖子'来自同一网址的精选图片。
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我想将精选图片设置为:example.com/image.png
我该怎么做?
答案 0 :(得分:10)
您可以将图像设置为媒体库中的后期精选缩略图。要在媒体库中添加图像,您需要将其上传到服务器。
试试这段代码:
// 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: 为此目的忽略wordpress标准并上传您的自定义文件夹上的所有发布单个图像并添加此图像路径或将外部图像URL作为额外属性元字段添加到帖子中,当您在主题上显示帖子时,只需使用您的img帮助post id。 演示代码: 用于设置图像
<?php
update_post_meta ( 7, 'imgkey', 'www.url.path' );//7 is post id
?>
用于在主题页面上显示要显示图像的图像
<?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 post自定义元字段的新手,请阅读本文
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-fields-manually
答案 1 :(得分:3)
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 然后使用 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 );
答案 2 :(得分:0)
我使用 wordpress 的媒体管理器 wp.media 从插件中的表单上传特色图片。它有它自己的优点,而且非常简单。
HTML 部分: 在 html 表单中,您只需要 2 个元素、一个按钮和一个隐藏的输入字段来存储图像 ID 并与表单一起发送。 (您可以使用 ajax 进行更新,但在我的情况下,此方法更简单)
<input type="button" name="select-thumbnail" class="button" Value="Select Thumbnail">
<input type="hidden" name="thumbnail-id" value="">
Javascript (jQuery):在 javascript 上,您需要-
jQuery('input[name="select-thumbnail"]').click(function(e) {
e.preventDefault();
var thumbMediaManager;
//open if already initialized
if(thumbMediaManager) {
thumbMediaManager.open();
return;
}
//create media manafer
thumbMediaManager = wp.media({
title: 'Select Thumbnail',
multiple: false,
library : {
type : 'image',
}
});
//when an image is selected
thumbMediaManager.on('select', function() {
var selection = thumbMediaManager.state().get('selection').first().toJSON();
//console.log(selection);
//insert the id into input field
jQuery('input[name="thumbnail-id"]').val(selection.id);
//Finally, open the media manager
thumbMediaManager.open();
});
Php: 提交表单时,检索图像附件 ID,并获取帖子 ID(在我的情况下来自 wp_insert_post),并使用 set_post_thumbnail()
$thumbnail_attachment_id = sanitize_text_field($_POST['thumbnail-id']);
$postId = wp_insert_post($newPost);
set_post_thumbnail($postId, $thumbnail_attachment_id);
set_post_thumbnail:https://developer.wordpress.org/reference/functions/set_post_thumbnail/