在我的类之外定义声明的变量

Question

I have a class where I first do a SQL check to see if some certain data exist and if not then I INSERT a new record.

I'd like to somehow define a variable ($feedback) indicating ive either inserted something or havent - I want to use this var in a callback in my main PHP file (where ive included the class)

My class

class registerVote {

function registerVote(){

}

function init() {
    //Define some vars  
    return true;
}

function save() {
        //Sql count query
        $res = mysql_query($sql) or die( mysql_error());
        $count = mysql_result($res, 0); 

        //If no records are found then INSERT
        if($count < 1){
            //Some INSERT query
            $feedback = "new";
        } else {
            $feedback = "old";
        }

    if($res) {
        return $feedback;
    }
}

}

My PHP FILE:

include_once ('../class/class_vote.php');
$registerVote = new registerVote();

    if($registerVote->init()) {
        if($registerVote->save()) {
            //Print out my $feedback from the class
        if ($feedback == "new") {
            echo "new";
        } else {
            echo "old";
        }
        }
    }

The above naturally doesnt work - so im naturally wondering if im able to achieve what ive tried to illustrate?

Answer 1

You can have your registerVote::save() function return the $feedback. That seems like a reasonable way of doing it.

Minor: if $res is false the or die case will have triggered and your script will exit, the if around the return isn't needed.