Stash::extend PHP Метод

    public function extend()
    {
        /* Sample use
                ---------------------------------------------------------
                {exp:stash:extend name="content" with="views:my_embed" stash:my_var="value"}
                
                Or as a tag pair with an arbitrary 4th tagpart:
        
                {exp:stash:extend:block name="content" with="views:my_embed"}
                    {stash:my_var}value{/stash:my_var}
                {/exp:stash:extend:block}
            
                --------------------------------------------------------- */
        if (FALSE === ($with = $this->EE->TMPL->fetch_param('with', FALSE))) {
            return;
        }
        $embed_params = array();
        unset($this->EE->TMPL->tagparams['with']);
        // have values other than embed name been passed in the "with" param? These should be passed as parameters to the embed:
        $with = explode(' ', $with, 2);
        // extract embed vars passed as params
        foreach ($this->EE->TMPL->tagparams as $key => $val) {
            if (strncmp($key, 'stash:', 6) == 0) {
                $embed_params[] = $key . '="' . $val . '"';
            }
        }
        // if this is a tag pair, construct an embed_extend tag and pass data enclosed by {stash:...} pairs to it
        if ($this->EE->TMPL->tagdata) {
            // construct the embed_extend tag
            $this->EE->TMPL->tagdata = LD . 'exp:stash:embed_extend name="' . $with[0] . '"' . (isset($with[1]) ? ' ' . $with[1] : '') . ' ' . implode(" ", $embed_params) . RD . $this->EE->TMPL->tagdata . LD . '/exp:stash:embed_extend' . RD;
        } else {
            // construct the embed tag
            $this->EE->TMPL->tagdata = LD . 'exp:stash:embed name="' . $with[0] . '"' . (isset($with[1]) ? ' ' . $with[1] : '') . ' ' . implode(" ", $embed_params) . RD;
        }
        // escape it?
        if ((bool) preg_match('/1|on|yes|y/i', $this->EE->TMPL->fetch_param('escape'))) {
            $this->EE->TMPL->tagdata = LD . 'stash:nocache' . RD . $this->EE->TMPL->tagdata . LD . '/stash:nocache' . RD;
        }
        // inject the embed into a variable / block
        return $this->set();
    }