在PHP中跨函数共享变量值

Question

I'm practising coding in an object oriented way; experimenting with taking some frequently used scripts for form handling and turning them into functions. Here is my code.

    class FormHandler{

        // Secure simple inputs
        public function secure($var){
                $var = stripslashes($var);
                $var = strip_tags($var);
                $var = htmlentities($var);
                return $var;
        }

        public function getAll(){
                foreach($_POST as $key => $value){
                ${$key} = secure($_POST[$key]);
                }
                $didGetAll =TRUE;
        }

        public function echoResults(){
            if($didGetAll === TRUE){
                echo "Form Contents<br>";
                foreach($_POST as $key => $value){
                    echo $key." => ".${$key}."<br>";
                }
            }else{
                    echo 'do getAll() fuction first'."<br>";
                }
    }
    } 

When I run the functions like so:

include './formhandling.php';

$form = new FormHandler;
$form -> getAll();
$form -> echoResults();

it returns the 'do getAll() fuction first' message even though the $didGetAll var should = true.

I assume this is because the variable values aren't being passed between functions?

I've tried to test this by making $didGetAll global, and by doing return $didGetAll. But it still returns the same result.

Could someone suggest what I'm doing wrong?

Answer 1

Use $didGetAll as a property in your class to access in object.

class FormHandler{
    private $didGetAll = FALSE;
    // Secure simple inputs
    public function secure($var){
        $var = stripslashes($var);
        $var = strip_tags($var);
        $var = htmlentities($var);
        return $var;
    }

    public function getAll(){
        foreach($_POST as $key => $value){
            $this->$key = $this->secure($_POST[$key]);
        }
        $this->didGetAll =TRUE;
    }

    public function echoResults(){
        if($this->didGetAll === TRUE){
            echo "Form Contents<br>";
            foreach($_POST as $key => $value){
                echo $key." => ".$this->$key."<br>";
            }
        }else{
                echo 'do getAll() fuction first'."<br>";
            }
    }
}