Class

Definition:

• Classes are user defined data types.
• Classes are collection of objects which are in similar datatype.
• We can create any number of objects under a single class.
• Class has 2 main parts 
          1.Properties:
                     Properties are nothing but simple variables.
          2.Methods:
                     Methods are functions of classes,used to manipulate data/variables/properties.

Sample code:1


      class pencilbox()
        {
             var $type;

             function set_type($mytype)
                {
                   $this->type=$mytype;
                 }


        }

Explanation:

• Here we are creating a class with the name pencilbox .
• $type-Property
• function set_type($mytype)-Method

Sample code :2


               class pencilbox()
        {
             var $type;

             function set_type($mytype)
                {
                   $this->type=$mytype;
                 }
            function get_type()
                {
              return   $this->type;
                 }

        }

Explanation:

•      Setter method is used to set a property.[function set_type($mytype)]
•      Getter method is used to get a property [function get_type()]
•       $this : is a builtin variable which points to the current. property.[$this->property name]