smarty - what is context->smarty->assign in prestashop and what is hook

Question

In indexController I have this

public function initContent()
    {
        //echo"asdsad";exit;
        parent::initContent();
        $this->context->smarty->assign('HOOK_HOME1', Hook::exec('displayHome'));
        $this->setTemplate(_PS_THEME_DIR_.'index.tpl');
    }

But I don't understand. What is $this->context->smarty->assign, and what is Hook?

Answer 1

assign公开可以在 smarty 模板中使用的变量。Hook::exec('displayHome')执行名为 的钩子displayHome，然后将结果分配给名为 的变量HOOK_HOME1。

查看Smarty 文档。这里还有一个可用的 prestashop 钩子列表