"PHP Dynamic Call method" with parameters to solve the idea

"PHP Dynamic Call method" with parameters
I have a VO class.
Columnvo extends Model

I want the model to call Vo's method.

However: New Columnvo ($DB), here to pass in a heavyweight $db.
But my Vo method is not applied to the $db.
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This function is implemented in model: What about $this->vo method (method parameter)?

Because the current $this has pointed to columnvo, and columnvo initialization, there are already $db.
If using reflection, it is not necessary to go through the following steps:
1.new Columnvo
2. Call the new Vo method.
In this case, the resources are wasted. And there is no way to invoke the other already initialized resources of the current $this.

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Single-Case mode
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I've seen it for a long time. Do you want some subclasses to inherit a property or method from the parent class?
It's better to think of something in the constructor of the parent class.
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As the boss said, the singleton mode can no longer allow you to transfer the object. Call a static method where you need it.
In addition, dynamic invocation of a method, with Call_user_func_array () enough
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I think you're messing things up.

Columnvo extends Model
You instantiate a columnvo, not a Model.
The so-called method of calling Columnvo in Model
is to call the subclass new method in the inherited parent class method

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