Object Aggregation 函数
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aggregate

(PHP 4 >= 4.2.0)

aggregate — Dynamic class and object aggregation of methods and properties

说明

void aggregate ( object $object , string $class_name )

Aggregates methods and properties defined in a class to an existing object. Methods and properties with names starting with an underscore character (_) are considered private to the aggregated class and are not used, constructors are also excluded from the aggregation procedure.

参数

object

class_name

返回值

没有返回值。

参见

Object Aggregation 函数
在线手册：中文 英文
PHP手册
PHP手册 - N: Dynamic class and object aggregation of methods and properties

用户评论:

mail at bealers dot com (20-Nov-2008 06:14)

I had to fix someone else's php4 code to work under php5 that was b0rked due to aggregate not working, here's how I did it.

<?php
 
class shell { }

$classes = array("foo", "bar", "baz");

function php5aggregate($holdingClass, $className)
{
  // use php5 reflection to suss out the method names for the given class
  // http://uk.php.net/manual/en/language.oop5.reflection.php
  $reflect = new ReflectionClass($className);
  foreach ($reflect->getMethods() as $method)
  {
    // copy the method to $holdingClass
    // http://www.php.net/manual/en/function.runkit-method-copy.php
    runkit_method_copy($holdingClass, $method->getName(), $className);
  }
}

if (version_compare(PHP_VERSION, '5.0.0') === 1)
{
  /**
  * aggregate() does not exist in php5, so use our custom function
  * note, our custom aggregate function takes the holding class *name*
  * which is instantiated afterwards, this is different to how the php4 function works
  */
  foreach($classes as $value)
  {
    php5aggregate("shell",$value);
  }

  $shell = new shell;
}
else
{
  // php4
  $shell = new shell;
  foreach($classes as $value)
  {
    aggregate($shell,$value);
  }
}
  
?>

kencomer at NOSPAM dot kencomer dot com (12-Sep-2005 05:22)

For PHP5 applications, the aggregate functionality available through classkit has been incorporated into and replaced by runkit. Per the classkit page of the PHP manual:

"Note:  This extension has been replaced by runkit, which is not limited to class manipulation but has function manipulation, as well."

  http://php.net/manual/en/ref.runkit.php

Per the runkit page:

" This package is meant as a feature added replacement for the classkit package. When compiled with the --enable-runkit=classkit  option to ./configure, it will export classkit compatible function definitions and constants."

Matt Barry (28-Mar-2005 08:02)

A note for those who may be implementing projects in PHP4 using aggregate(); these functions do not exist in PHP5.  For similar functionality, you can try using the Classkit extension:

http://us2.php.net/manual/en/ref.classkit.php

gmail pfayolle (07-Jan-2005 08:16)

Note that even if this can be used to emulate multiple inheritance to some extent, an object in PHP can only be subclass of the class used in the class declaration and no other.

<?php

class A {}
class B {}

class C extends A
{
  function C()
  {
    aggregate($this, 'B'); // emulate multiple inheritance
  }
}

$c = new C;
echo (int)is_subclass_of($c, 'B');

/*
Output: 0
*/

?>

hewei at ied dot org dot cn (02-Mar-2003 11:34)

YES you can use aggregation functions to simulate multiple inheritence.

function foo()
{
    aggregate($this, "bar");
    bar::bar();
}