php share variable between function in a class

Question

I'm new learner in PHP OOP, how can share or pass variable in between function within a class?

class Sample {

    public function One() {

         $var1 = 'abc';
         $var2 = 'xyz';

        return $var1;
    }

    public function Two() {

        $var3 = $var1.$var2;

        return $var3;
    }

}

Or is that possible to return multiple values?

thanks.

UPDATE

class Sample {

// This is how you declare class members
public $var1, $var2;

public function One() {

     // You use $this to refer class memebers
     $this->var1 = 'abc';
     $this->var2 = 'xyz';

    return $this->var1;
}

public function Two() {

    $var3 = $this->var1.$this->var2;

    return $var3;
}

}

$test = new Sample();
echo $test->Two();

I have test a provided example and it return blank in my page when calling function Two(), any idea?

If you don't call $test->One(), the variables remain unsetted. It's possible you may want to move the initialization to a constructor function (called __construct() in php)? — Carlos Campderrós
– Carlos Campderrós, Commented Dec 20, 2012 at 10:09

Sterling Archer · Accepted Answer · 2012-12-20 09:34:11Z

2

Make the variables public variables, declared after class Sample { and they can be used anywhere inside the class.

answered Dec 20, 2012 at 9:34

Sterling Archer

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3 Comments

Roman Newaza Over a year ago

They can be public, protected, private.

Sterling Archer Over a year ago

Yes, either and or. They can also be referenced by using $this->var1 etc

Roman Newaza Over a year ago

I can't see that by your post.

ennovativemedia · Accepted Answer · 2012-12-20 09:35:53Z

2

declare variables inside class and use $this to access variables

class Sample {
    public $var1;
    public $var2;

    public function One() {
        $this->var1 = 'abc';
        $this->var2 = 'xyz';
        return $this->var1;
    }

    public function Two() {
        $var3 = $this->var1.$this->var2;
        return $var3;
    }
}

answered Dec 20, 2012 at 9:35

ennovativemedia

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1 Comment

Mario Mueller Over a year ago

Making things public is not a good solution. Class members should remain private until they are needed in a subclass (which means they should go to protected). Public members should be used when you build simple value-entities with no additional logic and a strong attitude towards performance. Otherwise use getter/setter methods for your private/protected members.

Roman Newaza · Accepted Answer · 2012-12-20 09:37:35Z

1

class Sample {

    // This is how you declare class members
    protected $var1, $var2;

    public function One() {

         // You use $this to refer class memebers
         $this->var1 = 'abc';
         $this->var2 = 'xyz';

        return $this->var1;
    }

    public function Two() {

        $var3 = $this->var1.$this->var2;

        return $var3;
    }

}

answered Dec 20, 2012 at 9:37

Roman Newaza

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