What is PHP class?

What is PHP class?

class

A class is a collection of variables and functions working with these variables. A class is defined using the following syntax:

<?php
class Cart {
  var $items ;  // Items in our shopping cart

  // Add $num articles of $artnr to the cart

  function add_item ( $artnr , $num ) {
    $this -> items [ $artnr ] += $num ;
  }

  // Take $num articles of $artnr out of the cart

  function remove_item ( $artnr , $num ) {
    if ( $this -> items [ $artnr ] > $num ) {
      $this -> items [ $artnr ] -= $num ;
      return true ;
    } elseif ( $this -> items [ $artnr ] == $num ) {
      unset( $this -> items [ $artnr ]);
      return true ;
    } else {
      return false ;
    }
  }
}
?>

This defines a class named Cart that consists of an associative array of articles in the cart and two functions to add and remove items from this cart.