wp_upload_bits( string $name, null|string $deprecated, string $bits, string $time = null )

在上载文件夹中创建具有给定内容的文件。
Create a file in the upload folder with given content.

说明（Description）

如果存在错误，则键“error”将存在并显示错误消息。如果成功，则密钥'file'将具有唯一的文件路径，'url'键将具有指向新文件的链接。“error”键将被设置为false。此函数不会将上载的文件移动到上载文件夹。它将使用$bits参数中的内容创建一个新文件。如果移动上载文件，请读取上载文件的内容，然后可以将文件名和内容赋给此函数，该函数会将其添加到上载文件夹中。此功能将自动设置新文件的权限。

参数（Parameters）

源码（Source）

/**
 * Create a file in the upload folder with given content.
 *
 * If there is an error, then the key 'error' will exist with the error message.
 * If success, then the key 'file' will have the unique file path, the 'url' key
 * will have the link to the new file. and the 'error' key will be set to false.
 *
 * This function will not move an uploaded file to the upload folder. It will
 * create a new file with the content in $bits parameter. If you move the upload
 * file, read the content of the uploaded file, and then you can give the
 * filename and content to this function, which will add it to the upload
 * folder.
 *
 * The permissions will be set on the new file automatically by this function.
 *
 * @since 2.0.0
 *
 * @param string       $name       Filename.
 * @param null|string  $deprecated Never used. Set to null.
 * @param mixed        $bits       File content
 * @param string       $time       Optional. Time formatted in 'yyyy/mm'. Default null.
 * @return array
 */
function wp_upload_bits( $name, $deprecated, $bits, $time = null ) {
	if ( !empty( $deprecated ) )
		_deprecated_argument( __FUNCTION__, '2.0' );

	if ( empty( $name ) )
		return array( 'error' => __( 'Empty filename' ) );

	$wp_filetype = wp_check_filetype( $name );
	if ( ! $wp_filetype['ext'] && ! current_user_can( 'unfiltered_upload' ) )
		return array( 'error' => __( 'Invalid file type' ) );

	$upload = wp_upload_dir( $time );

	if ( $upload['error'] !== false )
		return $upload;

	/**
	 * Filter whether to treat the upload bits as an error.
	 *
	 * Passing a non-array to the filter will effectively short-circuit preparing
	 * the upload bits, returning that value instead.
	 *
	 * @since 3.0.0
	 *
	 * @param mixed $upload_bits_error An array of upload bits data, or a non-array error to return.
	 */
	$upload_bits_error = apply_filters( 'wp_upload_bits', array( 'name' => $name, 'bits' => $bits, 'time' => $time ) );
	if ( !is_array( $upload_bits_error ) ) {
		$upload[ 'error' ] = $upload_bits_error;
		return $upload;
	}

	$filename = wp_unique_filename( $upload['path'], $name );

	$new_file = $upload['path'] . "/$filename";
	if ( ! wp_mkdir_p( dirname( $new_file ) ) ) {
		if ( 0 === strpos( $upload['basedir'], ABSPATH ) )
			$error_path = str_replace( ABSPATH, '', $upload['basedir'] ) . $upload['subdir'];
		else
			$error_path = basename( $upload['basedir'] ) . $upload['subdir'];

		$message = sprintf( __( 'Unable to create directory %s. Is its parent directory writable by the server?' ), $error_path );
		return array( 'error' => $message );
	}

	$ifp = @ fopen( $new_file, 'wb' );
	if ( ! $ifp )
		return array( 'error' => sprintf( __( 'Could not write file %s' ), $new_file ) );

	@fwrite( $ifp, $bits );
	fclose( $ifp );
	clearstatcache();

	// Set correct file permissions
	$stat = @ stat( dirname( $new_file ) );
	$perms = $stat['mode'] & 0007777;
	$perms = $perms & 0000666;
	@ chmod( $new_file, $perms );
	clearstatcache();

	// Compute the URL
	$url = $upload['url'] . "/$filename";

	return array( 'file' => $new_file, 'url' => $url, 'error' => false );
}

笔记（Notes）