Get function name of child class in parent class

Question

I would like to have a base class with basic properties and functions, so I dont have to define them in all child classes.
I use php 5.3.3.

Is this impossible ?

class A {
  private $debug;
  private $var;
  protected function setVar($str) {
    $this->debug = 'Set by function `'. MAGIC_HERE .'` in class `'. get_called_class() .'`.';
    $this->var = $str;
    return true;
  }
  protected function getVar() {
    return $this->var;
  }
  protected function getDebug() {
    return $this->debug;
  }
}
class B extends A {
  public function __construct() {
    $this->doSomething();
  }
  public function doSomething() {
    $this->setVar('my string');
  }
}
$myobj = new B();
$myobj->getDebug();
// expected output "Set by function `doSomething` in class `B`."

possible duplicate: http://stackoverflow.com/questions/190421/caller-function-in-php-5 — The Scrum Meister, Dec 22 '10 at 16:27

score 0 · Answer 1 · answered Dec 22 '10 at 16:27

<?php
class A {
  private $debug;
  private $var;
  protected function setVar($str) {
    $this->debug = 'Set by function `'. MAGIC_HERE .'` in class `'. get_called_class() .'`.';
    $this->var = $str;
    return true;
  }
  protected function getVar() {
    return $this->var;
  }

  // Notice the public here, instead of protected //
  public function getDebug() {
    return $this->debug;
  }
}
class B extends A {
  public function __construct() {
    $this->doSomething();
  }
  public function doSomething() {
    $this->setVar('my string');
  }
}
$myobj = new B();
echo $myobj->getDebug();
// expected output "Set by function `doSomething` in class `B`."

You had just two small issues. A::getDebug needed to be public to be accessible from the outside and you forgot to output the return of A::getDebug.

score 0 · Answer 2 · answered Dec 22 '10 at 16:27

0

See the debug_backtrace function. Note this function is expensive, so you should disable those debug features in production.

answered Dec 22 '10 at 16:27

Artefacto

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score 0 · Answer 3 · answered Dec 22 '10 at 16:30

Is this no good for you?

I'm not running 5.3 locally, so I had to switch out get_called_class() but you could still use it. Should have made that clear, sorry.

class A {
  private $debug;
  private $var;
  protected function setVar($str, $class) {
    $this->debug = 'Set by function `` in class `'. $class .'`.';
    $this->var = $str;
    return true;
  }
  protected function getVar() {
    return $this->var;
  }
  public function getDebug() {
    return $this->debug;
  }
}
class B extends A {
  public function __construct() {
    $this->doSomething();
  }
  public function doSomething() {
    $this->setVar('my string', __CLASS__);
  }
}
$myobj = new B();
echo $myobj->getDebug();

Get function name of child class in parent class

3 Answers3