致命错误：调用未定义的函数empty（）

Any idea why I'm getting this strange error? "Fatal error: Call to undefined function empty()"

function newpart($name,$country,$bday_day,$bday_month,$bday_year,$gender,$pass1,$pass2,$email,$option1,$secondOption1,$secondOptionLevel1){ 


        $this->name = $name;
        $this->country = $country;
        $this->bday_day = $bday_day;
        $this->bday_month = $bday_month;
        $this->bday_year = $bday_year;
        $this->gender = $gender;
        $this->pass1 = $pass1;
        $this->pass2 = $pass2;
        $this->email = $email;
        $this->option1 = $option1;
        $this->secondOption1 = $secondOption1;
        $this->secondOptionLevel1 = $secondOptionLevel1;


        if( empty($this->name) || empty($this->pass1) ){
            $this->errorCount++;
        }



    }

If the variable isn't set you can get this error. Always when you are using the empty(), also use the isset(). I guess it will solve it for you.

The only thing I can think is you are using a version of php older than php 3. Though I cannot imagine you are on a server running on php3. Empty() came around in php 3.

I had the same fatal error...

before the word "empty" I did press alt + space instead of space in my editor. There was a fake white space.