Warning: sizeof():

Warning: sizeof(): Parameter must be an array or an object that implements Countable in /homepages/30/d291084378/htdocs/blog/wp-content/plugins/wp-mystat/lib/mystat.class.php on line 1252
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The line 1252 is : if(sizeof($param)==0){

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public function setStatisticsById($id,$param=Array()){
if($id==0){return $param;}
if(sizeof($param)==0){
$param = $this->getDriver()->getStatById($id);
}
if(!empty($param->browser)){return $param;}
$param = $this->setStatisticsBackground((int)$id,$param);
return $param;
}