如何从 url 以编程方式设置特色图片?
How to set featured image programmatically from url?
我有一些 post 个 ID,我想设置这些 post 个来自相同 url 的精选图片。
这是我添加的 post 代码:
$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
我该怎么做?
您可以将媒体库中的图像设置为 post 精选缩略图。要在您的媒体库中添加图片,您需要将其上传到您的服务器。
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 );
ref url : http://www.wpexplorer.com/wordpress-featured-image-url/
根据您的要求修改:
或者该目的忽略 WordPress 标准并将所有 post 单个图像上传到您的自定义文件夹,并将此图像路径或直接外部图像 url 添加到 post 作为额外属性元字段以及何时在您的主题上显示 post 然后只需在 post 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
?>
用于在您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 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
如果您必须加载图像然后指定为 post 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 );
只是为了补充@Naraj 的回答,如果您在外部文件中工作,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。
我有一些 post 个 ID,我想设置这些 post 个来自相同 url 的精选图片。
这是我添加的 post 代码:
$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
我该怎么做?
您可以将媒体库中的图像设置为 post 精选缩略图。要在您的媒体库中添加图片,您需要将其上传到您的服务器。
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 );
ref url : http://www.wpexplorer.com/wordpress-featured-image-url/
根据您的要求修改: 或者该目的忽略 WordPress 标准并将所有 post 单个图像上传到您的自定义文件夹,并将此图像路径或直接外部图像 url 添加到 post 作为额外属性元字段以及何时在您的主题上显示 post 然后只需在 post 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
?>
用于在您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 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
如果您必须加载图像然后指定为 post 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 );
只是为了补充@Naraj 的回答,如果您在外部文件中工作,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。