2 questions
 

Hi again,
What is diff. between ^ VS -?
Also what is function _X(&XXX)

Can you provide examples with your questions please. I don't understand your questions.

public function _Unshift_Assoc(&$Ary_Input, $Str_Key, $Int_Element)
{
if(!is_array($Ary_Input) || !is_string($Str_Key) || !is_integer($Int_Element) || strlen((string)$Str_Key) > 255 || strlen((string)$Int_Element) > 255 || $this->_Is_Blank($Str_Key) || $this->_Is_Blank($Int_Element)) return((boolean)false);
$Ary_Input= @array_reverse($Ary_Input, true);
$Ary_Input[$Str_Key]= $Int_Element;
$Ary_Input= @array_reverse($Ary_Input, true);
return((integer)count($Ary_Input));
}

For the first two operators: http://php.net/operators.bitwise (^) and http://php.net/operators.arithmetic (-)
For the & operator: http://php.net/references.pass

Those manual pages should provide enough information to understand what's going on, if not just ask here.