A single-class implementation of multiple subclass inheritance in PHP

class Parents{    protected $client;    protected function __construct()    {        //一系列操作....        $this->client = new $this->clientName();    }    public static function getInstance()    {        if (static::$ins === null)        {            static::$ins = new static();        }        return static::$ins;    }}class Son1{    protected static $ins = null;    protected $clientName = 'Test1';}class Son2{    protected static $ins = null;    protected $clientName = 'Test2';}

There are 1 parent classes, many subclasses, and now I want each subclass to implement a singleton, so I have the above notation. Because each subclass except the client's $clientName not the same, the other operation is the same, in order not to be implemented in each subclass, I use the above inheritance, because each $clientName instance will open the socket connection, so I want to use the singleton mode, Is there any problem or inconvenience in this way above? How to fix it

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class Parents{    protected $client;    protected function __construct()    {        //一系列操作....        $this->client = new $this->clientName();    }    public static function getInstance()    {        if (static::$ins === null)        {            static::$ins = new static();        }        return static::$ins;    }}class Son1{    protected static $ins = null;    protected $clientName = 'Test1';}class Son2{    protected static $ins = null;    protected $clientName = 'Test2';}

There are 1 parent classes, many subclasses, and now I want each subclass to implement a singleton, so I have the above notation. Because each subclass except the client's $clientName not the same, the other operation is the same, in order not to be implemented in each subclass, I use the above inheritance, because each $clientName instance will open the socket connection, so I want to use the singleton mode, Is there any problem or inconvenience in this way above? How to fix it

Pro, do I want to ask your code to test it? The protected constructor is paired with a public getinstance ... You can't get an object instance at all?

You manage the connection pool with a single instance, and it's much more troublesome to get so many subclasses.

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