_get_plugin_from_callback

_get_plugin_from_callback是一个WordPress函数，它返回调用某个回调函数的插件的名称: 这个函数被用来确定哪个插件导致一个特定的动作或过滤器被触发。它需要一个参数，即回调函数的名称。

内部辅助函数，从元框回调中找到插件。

function _get_plugin_from_callback( $callback ) {
	try {
		if ( is_array( $callback ) ) {
			$reflection = new ReflectionMethod( $callback[0], $callback[1] );
		} elseif ( is_string( $callback ) && false !== strpos( $callback, '::' ) ) {
			$reflection = new ReflectionMethod( $callback );
		} else {
			$reflection = new ReflectionFunction( $callback );
		}
	} catch ( ReflectionException $exception ) {
		// We could not properly reflect on the callable, so we abort here.
		return null;
	}

	// Don't show an error if it's an internal PHP function.
	if ( ! $reflection->isInternal() ) {

		// Only show errors if the meta box was registered by a plugin.
		$filename   = wp_normalize_path( $reflection->getFileName() );
		$plugin_dir = wp_normalize_path( WP_PLUGIN_DIR );

		if ( strpos( $filename, $plugin_dir ) === 0 ) {
			$filename = str_replace( $plugin_dir, '', $filename );
			$filename = preg_replace( '|^/([^/]*/).*$|', '\1', $filename );

			$plugins = get_plugins();

			foreach ( $plugins as $name => $plugin ) {
				if ( strpos( $name, $filename ) === 0 ) {
					return $plugin;
				}
			}
		}
	}

	return null;
}