Thursday 23 February 2017

php - What is += used for?



I think this is a dumb question but I could not find it on php. Why is a + with the = in the following code:



function calculateRanking()
{
$created = $this->getCreated();

$diff = $this->getTimeDifference($created, date('F d, Y h:i:s A'));


$time = $diff['days'] * 24;
$time += $diff['hours'];
$time += ($diff['minutes'] / 60);
$time += (($diff['seconds'] / 60)/60);

$base = $time + 2;

$this->ranking = ($this->points - 1) / pow($base, 1.5);


$this->save();
}


Is this so $time has all those values or rather it is adding all the values to $time?



Thanks


Answer



It's adding all those values to time.




something += somethingelse


is a shortcut for



something = something + somethingelse


-Adam


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