phpday 2025 - Call For Papers

Extending

If you want to create specialized versions of the built-in classes (say, for creating colorized HTML when being exported, having easy-access member variables instead of methods or having utility methods), you may go ahead and extend them.

Приклад #1 Extending the built-in classes

<?php
/**
* My Reflection_Method class
*/
class My_Reflection_Method extends ReflectionMethod
{
public
$visibility = array();

public function
__construct($o, $m)
{
parent::__construct($o, $m);
$this->visibility = Reflection::getModifierNames($this->getModifiers());
}
}

/**
* Demo class #1
*
*/
class T {
protected function
x() {}
}

/**
* Demo class #2
*
*/
class U extends T {
function
x() {}
}

// Print out information
var_dump(new My_Reflection_Method('U', 'x'));
?>

Поданий вище приклад виведе щось схоже на:

object(My_Reflection_Method)#1 (3) {
  ["visibility"]=>
  array(1) {
    [0]=>
    string(6) "public"
  }
  ["name"]=>
  string(1) "x"
  ["class"]=>
  string(1) "U"
}
Застереження

If you're overwriting the constructor, remember to call the parent's constructor before any code you insert. Failing to do so will result in the following: Fatal error: Internal error: Failed to retrieve the reflection object

add a note

User Contributed Notes

There are no user contributed notes for this page.
To Top