워드프레스 | 코드로 자료 업로드

<?php

/**
 * Insert an attachment from a URL address.
 *
 * @param  string   $url            The URL address.
 * @param  int|null $parent_post_id The parent post ID (Optional).
 * @return int|false                The attachment ID on success. False on failure.
 */
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;

}

출처

• WP: Insert attachment from URL (github.com)