PHP Create new class instance - singleton and factory pattern

Question

I have the following PHP Class:

class Init {

private static $instance = NULL;

public function __construct(){
}

public static function __callStatic($name, $arguments){

    if (is_null(self::$instance)) {
        $class = '\\' . __NAMESPACE__ . '\Drivers\\' . $name;

        $reflection = new \ReflectionClass($class);
        self::$instance = $reflection->newInstanceArgs($arguments);

        return self::$instance;
    } else {
        return self::$instance;
    }
}

}

Is there any other way to call the instantiated class, with the arguments array in that order, without using Reflection ? I've tried call_user_func_array() but it seems it doesn't work.

Thank you very much for your help

Is there a reason ReflectionClass is not ok while call_user_func_array is ok? — Esailija
– Esailija, Commented Nov 28, 2011 at 15:40
My class will be dependent to the ReflectionClass and i don't really know if that's ok. — SilVeR AleCS
– SilVeR AleCS, Commented Nov 28, 2011 at 15:57
Do you mean you might use it in PHP that doesn't support it? Otherwise it's exactly the same result as creating the instance normally — Esailija
– Esailija, Commented Nov 28, 2011 at 16:01
Do you mean you might use it in PHP that doesn't support it? Yes. Is that possible ? — SilVeR AleCS
– SilVeR AleCS, Commented Nov 28, 2011 at 16:14
No, it was introduced in php 5.1.3. Namespaces were introduced much later, in 5.3 I believe, so if you are using them in the first place... — Esailija
– Esailija, Commented Nov 28, 2011 at 16:28

yesnik · Accepted Answer · 2023-07-27 17:21:04Z

0

You can try it like this:

public class Example{
    private static $instance;
    public static function singleton($arguments)
        {
            if (!isset(self::$instance)) {
                echo 'Creating new instance.';
                $className = __CLASS__;
                self::$instance = new $className($arguments);
            }
            return self::$instance;
        }
}

edited Jul 27, 2023 at 17:21

yesnik

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answered Nov 28, 2011 at 15:36

LostMohican

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2 Comments

Wouter Dorgelo Over a year ago

Please avoid using echo in a class. Instead use comments and exceptions where necessarily ;-)

SilVeR AleCS Over a year ago

If i use this, the instantiated class cunstruct will receive an only one argument. In the initiated class constructor i want to have something like this: __construct($name, $city, $etc){ }

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