How to use sqliteCreateAggregate inside class

[Bonker]

This works fine:

PHP Code:

function GroupConcatStep(&$context, $string, $separator = ',') {
  $context .= $separator . $string;
}
function GroupConcatFinalize(&$context) {
  return $context;
}

$Db = new PDO('sqlite: MyDb.sqlite');
$Db->sqliteCreateAggregate('GROUP_CONCAT', 'GroupConcatStep', 'GroupConcatFinalize', 2); 


But I don't know how to do the same from inside a class. I don't get the names of the callback functions (methods) right. So the code below does not work:

PHP Code:

class MyClass {
  public function Connect() { 
    $this->Db = new PDO('sqlite:'.$Path.'/'.$this->DbName);
    $this->Db->sqliteCreateAggregate('GROUP_CONCAT', 'MyClass::GroupConcatStep', 'MyClass::GroupConcatFinalize', 2);
  }
  public function GroupConcatStep(&$context, $string, $separator = ',') {
    $context .= $separator . $string;
  }
  public function GroupConcatFinalize(&$context) {
    return $context;
  }
} 


[Bonker]

Never mind, I just found out. This does the trick:

PHP Code:

$this->Db->sqliteCreateAggregate('GROUP_CONCAT', array($this, 'GroupConcatStep'), array($this, 'GroupConcatFinalize')); 


[Fou-Lu]

That is correct, I'm glad you found the solution!
Just remember that callbacks always take class/object and parameters as array arguments and you'll be fine. The callBack definition is kind of difficult to find in PHP (hidden under pseudo types >.< http://ca3.php.net/manual/en/languag...types.callback), and their namespace usage has also been terribly documented (which I'm not worried about, there is still time). I have no idea why they decided to do it this way; I figure a function pointer definition or delegate would have been a far better solution since we would be able to typecast our own callback definitions.
Methinks we're stuck with this way now though >.<