How to Pass values to constructors in the class in the form of variables

How to pass the value code to the constructor in the form of variables is as follows, because the constructor needs to input multiple values, and the number of values imported each time may not be fixed. if not, the default value in the construction of sweet potato is used, so here I use an array to pass in. below I have used implode to cut the array into strings and connected it, why are the $ host variables transferred in? the result is:
Host: 192.168.1.1 and 1212
Port: 80

That is to say, the post is passed to $ host, and the port is used by default in the class.

class test{public function __construct($host="127.0.0.1",$port="80"){echo 'host:'.$host."
";echo 'port:'.$port;}}$data['host']='192.168.1.1';$data['port']='1212';$str=implode(',',$data);$obj=new test($str);

Result:

host:192.168.1.1,1212port:80

Reply to discussion (solution)

Low-level errors
$ Str is just a variable. how can a program automatically understand it as two?

So you passed a host variable 192.168.1.1. if the 1212 port variable is not passed, the default 80

Write like this

class test{    public function __construct($host="127.0.0.1",$port="80")    {        echo 'host:'.$host."
";        echo 'port:'.$port;    } }$data['host']='192.168.1.1';$data['port']='1212';$ref = new ReflectionClass('test');$obj = $ref->newInstanceArgs($data);

Host: 192.168.1.1
Port: 1212

 ";        echo 'port:'.$port;    } } $data['host']='192.168.1.1';$data['port']='1212';//$str=implode(',',$data);//$obj=new test($str);$obj = test::new_object($data);

Host: 192.168.1.1
Port: 1212

$ Ref = new ReflectionClass ('test ');
$ Obj = $ ref-> newInstanceArgs ($ data );