rapid questions in PHP variable .. please help ?

P

prince_bakora

New member
Hi all
i have question about somethings I see in php codes and do not know what that means ?
==============

first :
function __construct()

+?+ what ( __ ) sign means ?
==============

Second:
$this->

+?+ what ( -> ) means ?

==============
Third:
$this->_timestart = microtime(true);

+?+ what ( _ ) sign before ( timestart ) means ?

==============

if you don't want to explain .. please provide me with right titles to search about in Google .

thanks
 
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