Setting public class variables

Question

How do I set a public variable  Is this correct    class Testclass     public  testvar    default value      function dosomething           echo  this- gt testvar          Testclass   new Testclass     Testclass- gt testvar    another value        Testclass- gt dosomething

User · Answer

For overloading you d need a subclass   class ChildTestclass extends Testclass       public  testvar    newVal       obj   new ChildTestclass     obj- gt dosomething      This code would echo newVal

User · Answer

Use Constructors    lt  php class TestClass       public  testVar    default value       public function   construct  varValue                this- gt testVar    varValue                              object   new TestClass  another value    print  object- gt testVar    gt

User · Answer

Add getter and setter method to your class   public function setValue  new value         this- gt testvar    new value     public function getValue         return  this- gt testvar

User · Answer

You re  setting  the value of that variable attribute  Not overriding or overloading it  Your code is very  very common and normal   All of these terms   set    override    overload   have specific meanings  Override and Overload are about polymorphism  subclassing    From http   en wikipedia org wiki Object-oriented programming       Polymorphism allows the programmer to treat derived class members just like their parent class  members  More precisely  Polymorphism in object-oriented programming is the ability of objects belonging to different data types to respond to method calls of methods of the same name  each one according to an appropriate type-specific behavior  One method  or an operator such as    -  or    can be abstractly applied in many different situations  If a Dog is commanded to speak    this may elicit a bark    However  if a Pig is commanded to speak    this may elicit an oink    They both inherit speak   from Animal  but their derived class methods override the methods of the parent class  this is Overriding Polymorphism  Overloading Polymorphism is the use of one method signature  or one operator such as      to perform several different functions depending on the implementation  The     operator  for example  may be used to perform integer addition  float addition  list concatenation  or string concatenation  Any two subclasses of Number  such as Integer and Double  are expected to add together properly in an OOP language  The language must therefore overload the addition operator       to work this way  This helps improve code readability  How this is implemented varies from language to language  but most OOP languages support at least some level of overloading polymorphism

User · Answer

Inside class Testclass   public function   construct  new value         this- gt testvar    new value

User · Answer

If you are going to follow the examples given  using getter setter or setting it in the constructor  change it to private since those are ways to control what is set in the variable    It doesn t make sense to keep the property public with all those things added to the class

User · Answer

this is the way  but i would suggest to write a getter and setter for that variable   class Testclass        private  testvar    default value        public function setTestvar  testvar              this- gt testvar    testvar             public function getTestvar              return  this- gt testvar              function dosomething                 echo  this- gt getTestvar              Testclass   new Testclass      Testclass- gt setTestvar  another value      Testclass- gt dosomething

User · Answer

class Testclass     public  testvar     function dosomething           echo  this- gt testvar          Testclass   new Testclass     Testclass- gt testvar    another value        Testclass- gt dosomething        It will print  another value

[php] Setting public class variables

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