PHP Object - Proper way to define a property with an If statement-CodePudding

Minimal example:

class Equipment
{
    public $Temp;

    function __construct($filter) {

        $this->Temp = 100;
        
        if(ContainsStringHelper($filter, "car")) {
            $this->Running = true;
        }
    }
}

You can see that I want to define $this->Running if the $filter variable contains the word car. If it does not, I don't want the property on the object.

This works, however PHPStorm throws a problem saying "Property declared dynamically":

I can get rid of that by declaring the property public $Running, but I don't want it to be a property on the object as null if the logic doesn't assign it a value.

Is there a proper way to do this?

CodePudding user response：

A solution can be to declare the property and unset it during construction in your condition :

class Equipment
{
    public $Temp;
    public $Running = NULL;
    
    function __construct($filter) {

        $this->Temp = 100;

        if(ContainsStringHelper($filter, "car")) {
            $this->Running = true;
        } else {
            unset($this->Running) ;
        }
    }
}