PHP构造函数参数不能正常工作？

Somehow my constructor doesn`t seem to work properly:

private $matchId;
private $region;
private $date;
private $wAdc;
private $wSupp;
private $lAdc;
private $lSupp;
private $summoners;

public function _construct($matchId, $region, $date) {
    $this->matchId = $matchId;
    $this->region = $region;
    $this->date = $date;
    $this->summoners = array();
    $this->wAdc = null;
    $this->wSupp = null;
    $this->lAdc = null;
    $this->lSupp = null;
}

public function getMatchId() {
    return $this->matchId;
}

And here the object creation:

$matchObj = new match($matchId, $region, $created);
$matches[] = $matchObj;
echo "a: ". $matchId . " ";
echo "b: ". $matchObj->getMatchId() . " ";

And here the output I get when I run the script in my browser:

a: 1936074952 b: 

So the object variable doesn`t seem to get set properly. Could anybody help me out?

You forgot a underscore

It should be public function __construct()

There is an error in your constructor, try this:

public function __construct($matchId, $region, $date) {...}