无法在Codeigniter的内部结构中设置Cookie [英] Can't set cookie inside construct in codeigniter

问题描述

如果 null ，我试图设置一个cookie，但我无法使其正常工作:

I trying to set a cookie if null but I can't get it to work:

public function __construct()
{
    parent::__construct();
    if ($this->input->cookie('ff', TRUE) == FALSE)
    {
        $this->input->set_cookie('ff', 'on', 86500);
        dump($this->input->cookie('ff', TRUE));
    }
}

我在做什么错了?

dump()这只是一个自定义调试功能.

dump() it's just a custom debug function.

推荐答案

set_cookie调用可能失败的几个原因:

A couple of reasons your set_cookie call might fail:

1)调用set_cookie时，您已经向浏览器输出了某些内容，在这种情况下，您可能会在已发送标头"的行中收到错误/通知.要解决此问题，只需确保在发送任何内容到浏览器之前发生set_cookie调用即可.

1) You've output something to the browser already when set_cookie is called, in which case you might get an error/notice along the lines of "Headers already sent". To fix that, just ensure that the set_cookie call occurs before sending anything to the browser.

2)如果您正在进行本地开发和测试，则"localhost"不被视为有效域，因此不会为它保存任何cookie.一种解决方法是在您的主机文件中添加一个条目，例如:

2) If you're doing local development and testing, "localhost" is not considered a valid domain, so no cookies will be saved for it. A workaround would be to add an entry in your hosts file, for example:

localhost.dev    127.0.0.1

然后使用该域而不是"localhost"进行测试.

And then test with that domain, instead of "localhost".

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