PHP Calling another class method

Question

I m still learning OOP so this might not even be possible  although I would be surprised if so   I need some help calling another classes method   For example in ClassA I have this method   function getName         return  this- gt name      now from ClassB  different file  but in the same directory   I want to call ClassA s getName    how do I do that  I tried to just do an include   but that does not work   Thanks

User · Answer

If they are separate classes you can do something like the following:

class A
{
    private $name;

    public function __construct()
    {
        $this->name = 'Some Name';
    }

    public function getName()
    {
        return $this->name;
    }
}

class B
{
    private $a;

    public function __construct(A $a)
    {
        $this->a = $a;
    }

    function getNameOfA()
    {
        return $this->a->getName();
    }
}

$a = new A();
$b = new B($a);

$b->getNameOfA();

What I have done in this example is first create a new instance of the A class. And after that I have created a new instance of the B class to which I pass the instance of A into the constructor. Now B can access all the public members of the A class using $this->a.

Also note that I don't instantiate the A class inside the B class because that would mean I tighly couple the two classes. This makes it hard to:

unit test your B class
swap out the A class for another class

User · Answer

You would need to have an instance of ClassA within ClassB or have ClassB inherit ClassA  class ClassA       public function getName           echo  this- gt name           class ClassB extends ClassA       public function getName           parent  getName              Without inheritance or an instance method  you d need ClassA to have a static method  class ClassA     public static function getName         echo  Rawkode           --- other file ---  echo ClassA  getName     If you re just looking to call the method from an instance of the class   class ClassA     public function getName         echo  Rawkode           --- other file ---   a   new ClassA    echo  a- gt getName      Regardless of the solution you choose  require  ClassA php is needed

User · Answer

File 1  class ClassA        public  name    A        public function getName            return  this- gt name             File 2  include  file1 php    class ClassB        public  name    B        public function getName            return  this- gt name             public function callA             a   new ClassA            return  a- gt getName               public static function callAStatic             a   new ClassA            return  a- gt getName               b   new ClassB    echo  b- gt callA    echo  b- gt getName    echo ClassB  callAStatic

User · Answer

file1 php  lt  php  class ClassA      private  name    John       function getName             return  this- gt name              gt     file2 php  lt  php    include   file1 php        class ClassB            function   construct                       function callA                  classA   new ClassA            name    classA- gt getName           echo  name       Prints John                  classb   new ClassB        classb- gt callA      gt

[php] PHP: Calling another class' method

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