: PHP5 13, . 296-323
:
- .
- (public, private, protected)
- .
.
- () .
, , .
(), (), .
. PHP4, PHP5.
1
<?php
class myPHP4Class
{
var $my_variable;
function my_method($param)
{
echo " my_method($param)!\n";
echo " : ";
echo "{$this->my_variable}\n";
}
}
?>
$this , . .
() .
new.
2
<?php
include_once (myPHP4Class_def.php)
$myinstance = new myPHP4Class();
$anotherinstance = new myPHP4Class();
?>
$myinstance $anotherinstance myPHP4Class. .
->
3
<?php
include_once (myPHP4Class_def.php)
$myinstance = new myPHP4Class();
$anotherinstance = new myPHP4class();
$myinstance->my_variable = 10;
$anotherinstance->my_variable = 20;
$myinstance->my_method("MyParam");
?>
(public, private, protected)
PHP4 , .. public.
PHP5 3 : public, private, protected.
PHP5 1 : ( )
4
<?php
class myPHP5Class
{
public $my_variable;
public function my_method($param)
{
echo " my_method($param)!\n";
echo " : ";
echo "{$this->my_variable}\n";
}
}
?>
public () . ($this) ( -> ).
private () () $this.
|
|
|
4, private.
5
<?php
class myPHP5Class
{
private $my_variable;
public function my_method($param)
{
echo " my_method($param)!\n";
echo " : ";
echo "{$this->my_variable}\n";
}
}
$myobject = new myPHP5Class();
$myobject-> my_method(MyParam); //
$myobject->my_variable = 10; //
?>
, () (). : .
PHP4 .
PHP5 : __construct(), : __destruct().
6
<?php
class SimpleClass
{
function __construct($param)
{
echo " SimpleClass!";
}
function __destruct()
{
echo " SimpleClass";
}
}
$myinstance = new SimpleClass("value");
unset($myinstance); //
?>
, , .
PHP5. . const, .
7
<?php
class ConstExample
{
private $myvar;
public $readme;
const MY_CONSTANT = 10;
public function showConstant()
{
echo ": ".MY_CONSTANT;// : $this (.. )
}
}
$inst = new ConstExample;
$inst->showConstant();
echo ": ".ConstExample::MY_CONSTANT;
?>
, .
.
. (: < >::<>).
.
(static) , , . . $this, .
static.
static function myMetod()
{
}
:
< >::<>
, .
|
|
|
() ().
, , -. , public protected. , extends.
8 ( )
<?php
class ParentClass
{
public $parentvar;
public function parentOne()
{
echo "Called parentOne()\n";
}
private function parentTwo()
{
echo "Called parentTwo()!\n";
}
}
class ChildClass extends ParentClass
{
public function childOne()
{
echo "Called childOne()!\n";
}
/* parentOne() ,
ParentClass
parentTwo() */
}
$v = new ChildClass();
$v->parentOne();
?>
, protected -.
private .
public , - .
:
9 ( )
<?php
Class ParentClass
{
public function callMe()
{
echo " !\n";
}
}
class ChildClass extends ParentClass
{
public function callMe()
{
echo " !\n";
}
}
$child = new ChildClass;
$child-> callMe();
?>
ChildClass. .
10 ( PHP)
<?php
Class ParentClass
{
public function callMe()
{
$this->anotherCall();
}
public function anotherCall()
{
echo " !\n";
}
}
class ChildClass extends ParentClass
{
public function anotherCall()
{
echo " !\n";
}
}
$child = new ChildClass;
$child-> callMe();
?>
callMe() ChildClass, , ParentClass. anotherCall() $this. ? . . , $this , ( ChildClass), , $this.
.
PHP4
<?php
$class_one = new MyClass();
$class_one_copy = $class_one; // PHP5 $class_one_copy $class_one // $class_one $class_one_copy .
?>
PHP5
<?php
$class_one = new MyClass();
$class_one_copy = clone $class_one; // clone
//$class_one_copy $class_one $class_one //$class_one_copy
?>
PHP5 PHP4:
