public function actionUploadImage(){
$path = StaticFilesHelper::createLectureImagePath();
// files storage folder
$dir = Yii::getpathOfAlias('webroot').$path;
$_FILES['file']['type'] = strtolower($_FILES['file']['type']);
if ($_FILES['file']['type'] == 'image/png'
|| $_FILES['file']['type'] == 'image/jpg'
|| $_FILES['file']['type'] == 'image/gif'
|| $_FILES['file']['type'] == 'image/jpeg'
|| $_FILES['file']['type'] == 'image/pjpeg')
{
// setting file's mysterious name
$filename = md5(date('YmdHis')).'.jpg';
$file = $dir.$filename;
// copying
copy($_FILES['file']['tmp_name'], $file);
// displaying file
$array = array(
'filelink' => '/images/lecture/'.$filename
);
echo stripslashes(json_encode($array));
}
}