如何使用组件中的 cookie? [英] How to use cookies from a component?

问题描述

如何在 Joomla 组件中使用 cookie?

How can I use cookies in a Joomla component?

setcookie( JUtility::getHash('JLOGIN_REMEMBER'), false, time() - 86400, '/' );

有人能描述一下这是如何工作的吗?

Can anybody describe how this works?

推荐答案

// Get input cookie object
$inputCookie  = JFactory::getApplication()->input->cookie;

// Get cookie data
$value        = $inputCookie->get($name = 'myCookie', $defaultValue = null);

// Check that cookie exists
$cookieExists = ($value !== null);

// Set cookie data
$inputCookie->set($name = 'myCookie', $value = '123', $expire = 0);

// Remove cookie
$inputCookie->set('myCookie', null, time() - 1);

关于$expire值的一些规则

• 它是一个以秒为单位的 Unix tinestamp，例如 time()<的返回值/code>.
• $expire == 0:cookie 生存期是浏览器会话.
• $expire :cookie 正在被删除(过期设置为过去).您可以通过将 cookie 的值设置为 null 来删除 cookie，但显然 IE 无法这样做.

Some rules about $expire value

• its a Unix tinestamp in seconds, like return value of time().
• $expire == 0: cookie lifetime is of browser session.
• $expire < time(): cookie is being deleted (expire set to past). You could remove cookie by setting it's value to null, but apparently IE fails to do so.

请记住，应在发送标头之前(通常在回显输出之前)设置 cookie.

Cookie 键和值应该正确转义

在集合上序列化值时(如 json_encode($dataNode))，请记住使用适当的过滤器稍后检索它.默认为 cmd，它过滤掉除 a-Z、0-9 之外的几乎所有内容并破解 JSON 结构.

When serializing the value on set (like json_encode($dataNode)), remember to use proper filter to retrieve it later on. Default is cmd, which filters out pretty much anything but a-Z, 0-9 and cracks JSON structure.

// Get cookie data
$encodedString = $inputCookie->get('myCookie', null, $filter = 'string');

// Decode
$values = json_decode($encodedString);

// Encode and Set
$inputCookie->set('myCookie', json_encode($values));

参考

• Joomla CMS github 存储库:JInputCookie::set(有据可查)
• php 文档:php.net/setcookie(开发者体验)
• 维基百科:HTTP Cookies(理论)

Rererences

• Joomla CMS github repository: JInputCookie::set (very well documented)
• php docs: php.net/setcookie (developer experiences)
• Wikipedia: HTTP Cookies (theory)

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