PHP Classes and objects

Look at an example

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<?php Class Cart {     var $items; //Shopping cart Items    //Put $num $a Rtnr into the car     function Add_item ($ARTNR, $num)     {          $this->items[$artnr] + = $num;    }    //Take $num $artnr out of the car     function Remove_item ($ARTNR, $num)  &nbs p;  {         if ($this->items[$artnr] > $num) {              $this->items[$artnr]-= $num;             return true;        } else {              return false;        }    } }

The above type defines a class called Class, which is a class consisting of an array of shopping carts and two items that are used to add and remove merchandise functions from a shopping cart.

Declares the class we want to see how the example uses

Create an object,

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$obj 111cn_.net = new Cart;

Instance

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<?php Class session { Public Function __construct () { Echo ' constructor execution '; } Public Function __destruct () { echo ' destructor execution '; } } $OBJ = new Session; Unset ($OBJ);//Delete object, __destruct () will be invoked Output Constructor execution /destructor Execution ?>

$obj 111cn_.net->add_item (1,2);

This is the property and method of the calling class.

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<?php Class session { Public $age = 20; Public $sub = ' www.111cn.net '; Public Function __clone () { $this->sub=clone $this->sub; } } Class Session 2 { Public $value = 5; } $s = new session; $s->sub=new session 2; $s 2 = clone $s; $s->sub-> $value = 10; echo $s 2->sub-> $value; ?>

Invoke PHP Class Property and method instance two

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<?php Class session { Public $age = 20; Public $sub = ' 111cn.net '; Public Function __clone () { $this->sub=clone $this->sub; } } Class Session 2 { Public $value = 5; } $s = new session; $s->sub=new session 2; $s 2 = clone $s; $s->sub-> $value = 10; echo $s 2->sub-> $value; ?>

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