In the MVC of the thinkphp framework, in order to more conveniently implement data transfer between the controller and the view, we often use the $this->assign() method to transfer data to the view file. . In the controller method, in order to process URL address parameters more conveniently, we often use the $this->request->param() method to obtain parameters. However, in some cases, we need to splice the URL and pass parameters in the controller method. In this case, we need to use the r() method.

So, what is the r() method? The r() method is a URL generation method in the thinkphp framework. It is used to generate URL addresses and can pass parameters. Its basic syntax is:

r('[模塊/控制器/操作]',?['參數(shù)名'?=>?'參數(shù)值']);

Among them, [Module/Controller/Operation] represents the URL address that needs to be accessed, ['Parameter name' => 'Parameter value '] indicates the parameters that need to be passed. One or more parameters can be passed.

So, how do we use the r() method to pass parameters? Below we will introduce it in detail with examples.

For example, if we need to generate a URL address and pass parameters in the controller method, we can write like this:

public?function?index()
{
????//生成URL地址并傳遞參數(shù)
????$url?=?url('index/detail',?['id'?=>?1,?'name'?=>?'ThinkPHP']);
????return?$this->fetch('',?['url'?=>?$url]);
}

In the above code, url('index/detail', ['id' => 1, 'name' => 'ThinkPHP']), index/detail represents the controller method that needs to be accessed, ['id' = > 1, 'name' => 'ThinkPHP'] represents the parameters that need to be passed, where id is 1 and name is ThinkPHP. The final generated URL address is: http://domain name/index/detail/id/1/name/ThinkPHP.html.

The above method of generating a URL address is implemented through the url() function, but in the thinkphp framework, the url() function is implemented through r() method, so we can also use the r() method to generate URL addresses and pass parameters.

The following is an example code that uses the r() method to generate URL addresses and pass parameters:

public?function?index()
{
????//生成URL地址并傳遞參數(shù)
????$url?=?r('index/detail',?['id'?=>?1,?'name'?=>?'ThinkPHP']);
????return?$this->fetch('',?['url'?=>?$url]);
}

In the above code, r('index/detail ', ['id' => 1, 'name' => 'ThinkPHP']), index/detail represents the controller method that needs to be accessed, ['id ' => 1, 'name' => 'ThinkPHP'] represents the parameters that need to be passed, where id is 1 and name is ThinkPHP. The final generated URL address is also: http://domain name/index/detail/id/1/name/ThinkPHP.html.

It should be noted that the URL address and parameter passing method generated using the r() method are the same as using the url() method.

To sum up, the r() method is a URL generation method in the thinkphp framework, which can easily generate URL addresses and pass parameters. When we need to splice URLs and pass parameters in controller methods, we might as well try the r() method, which can bring us a more convenient and faster programming experience.

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