每天laravel-20160805| Container -8

    /** * Assign a set of tags to a given binding. * * @param array|string $abstracts * @param array|mixed ...$tags * @return void */
    public function tag($abstracts, $tags) {// Assign a set of tags to a given binding.
        $tags = is_array($tags) ? $tags : array_slice(func_get_args(), 1);
        // get the first args
        foreach ($tags as $tag) {// foreach $tags to $tag
            if (! isset($this->tags[$tag])) {
                $this->tags[$tag] = [];
            }// check it is set, so set it like init it.

            foreach ((array) $abstracts as $abstract) {
                $this->tags[$tag][] = $this->normalize($abstract);
            }// if the abstracts is array, we ge we want insert into the array.
        }
    }// the function has two parameter one is tag another is abstracts
    // so last we set the $this->tags, bay tags and abstracts

    /** * Resolve all of the bindings for a given tag. * * @param string $tag * @return array */
    public function tagged($tag)// like get all the callback binding for a given tag. {
        $results = [];// set a store by array

        if (isset($this->tags[$tag])) {// i know why set the tag by tag function
            foreach ($this->tags[$tag] as $abstract) {// get the abstract
                $results[] = $this->make($abstract);// this->make the function like function.
            }
        }

        return $results;// return store array
    }