Can not save form data to MySQL databases

    static public function ctrCreateUser(){
		if (isset($_POST["newUser"])) {
			if (preg_match('/^[a-zA-Z0-9 ]+$/', $_POST["newName"]) &&
				preg_match('/^[a-zA-Z0-9]+$/', $_POST["newUser"]) &&
				preg_match('/^[a-zA-Z0-9]+$/', $_POST["newPasswd"])){
				$photo = "";
				if (isset($_FILES["newPhoto"]["tmp_name"])){

				list($width, $height) = getimagesize($_FILES["newPhoto"]["tmp_name"]);
				$newWidth = 500;
				$newHeight = 500;
				$folder = "views/img/users/".$_POST["newUser"];
				mkdir($folder, 0755);
				if($_FILES["newPhoto"]["type"] == "image/jpeg"){
					$randomNumber = mt_rand(100,999);
					$photo = "views/img/users/".$_POST["newUser"]."/".$randomNumber.".jpg";
					
					$srcImage = imagecreatefromjpeg($_FILES["newPhoto"]["tmp_name"]);
					$destination = imagecreatetruecolor($newWidth, $newHeight);
					imagecopyresized($destination, $srcImage, 0, 0, 0, 0, $newWidth, $newHeight, $width, $height);
					imagejpeg($destination, $photo);
				}
				if ($_FILES["newPhoto"]["type"] == "image/png") {

					$randomNumber = mt_rand(100,999);
					$photo = "views/img/users/".$_POST["newUser"]."/".$randomNumber.".png";
					$srcImage = imagecreatefrompng($_FILES["newPhoto"]["tmp_name"]);
					
					$destination = imagecreatetruecolor($newWidth, $newHeight);
					imagecopyresized($destination, $srcImage, 0, 0, 0, 0, $newWidth, $newHeight, $width, $height);
					imagepng($destination, $photo);
				}
			}
			$table = 'users';
			$encryptpass = crypt($_POST["newPasswd"], '$2a$07$asxx54ahjppf45sd87a5a4dDDGsystemdev$');
			$data = array('name' => $_POST["newName"],
						  'user' => $_POST["newUser"],
							'password' => $encryptpass,
							'profile' => $_POST["newProfile"],
							'photo' => $photo);
			$answer = UsersModel::mdlAddUser($table, $data);
			if ($answer == 'ok') {
					......................}
                            else{
                            ..........}
		
		}
}

static public function ctrCreateCu(){
		if(isset($_POST["newCu"])){

			if(preg_match('/^[a-zA-Z0-9]+$/', $_POST["newCu"]) &&
			   preg_match('/^[()\-0-9 ]+$/', $_POST["newPhone"]) && 
			   preg_match('/^[#\.\-a-zA-Z0-9 ]+$/', $_POST["newAddress"])){

			   	$table = "cu";

			   	$data = array("name"=>$_POST["newCu"],
					           "phone"=>$_POST["newPhone"],
					           "address"=>$_POST["newAddress"];

			   	$answer = ModelCu::mdlAddCu($table, $data);

			   	if($answer == "ok"){

					....

				}

			}else{

			....

			}

		}