How to Insert Attachment Via External Url
<?php
function wp_insert_attachment_from_url( $url, $parent_post_id = null ) {
if ( ! class_exists( 'WP_Http' ) ) {
require_once ABSPATH . WPINC . '/class-http.php';
}
$http = new WP_Http();
$response = $http->request( $url );
if ( 200 !== $response['response']['code'] ) {
return false;
}
$upload = wp_upload_bits( basename( $url ), null, $response['body'] );
if ( ! empty( $upload['error'] ) ) {
return false;
}
$file_path = $upload['file'];
$file_name = basename( $file_path );
$file_type = wp_check_filetype( $file_name, null );
$attachment_title = sanitize_file_name( pathinfo( $file_name, PATHINFO_FILENAME ) );
$wp_upload_dir = wp_upload_dir();
$post_info = array(
'guid' => $wp_upload_dir['url'] . '/' . $file_name,
'post_mime_type' => $file_type['type'],
'post_title' => $attachment_title,
'post_content' => '',
'post_status' => 'inherit',
);
// Create the attachment.
$attach_id = wp_insert_attachment( $post_info, $file_path, $parent_post_id );
// Include image.php.
require_once ABSPATH . 'wp-admin/includes/image.php';
// Generate the attachment metadata.
$attach_data = wp_generate_attachment_metadata( $attach_id, $file_path );
// Assign metadata to attachment.
wp_update_attachment_metadata( $attach_id, $attach_data );
return $attach_id;
}
?>
This above code return $attach_id. By using this attach id we can easily set post thumbnail image by using below code
set_post_thumbnail( int|WP_Post $post, int $thumbnail_id )