PHP CLASSES AND OBJECTS

Sugar babies

 PHP Classes

  • Class is a user defined data type in PHP.
  • In order to define a new class, PHP provides a keyword class, which is followed by a name. 
  • Any label that is valid as per PHP's naming convention (excluding PHP's reserved words) can be used as name of class.

CONCEPT OF CLASS IN PHP :

  • Social class, also called class, a group of people within a society who possess the same socioeconomic status. 
  • Besides being important in social theory.
  • The concept of class as a collection of individuals sharing similar economic circumstances has been widely used in censuses and in studies of social mobility.

TYPES OF CLASS IN PHP :

  • Upper
  • Middle
  • Lower
  • Peasants
  • Under-class. 

SYNTAX TO CLASS IN PHP :

<? php class person { } ?>

PHP OBJECTS

  • Object is a compound data type (along with arrays).
  • Values of more than one types can be stored together in a single variable.
  • Object is an instance of either a built-in or user defined class.
  • In addition to properties, class defines functionality associated with data.
  • Primary variables, arrays and other objects can be cast to object data type using casting operator.

EXAMPLE :

<?php
class SayHello{
    function hello(){
        echo"Hello World";
    }
}
$obj=new SayHello;
$obj->hello();
?>

OUTPUT :

Hello World


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