variable scope method{foreach{if(){variable}else{}}}

Question

Why does this work? I thought variables would only be visible within scope... Or is the scope method?

1) Ideally: $variable-name would be defined first step with foreach... but how?
2) why is $variable defined in the if clause accessible in the whole foreach block?
3) in PHPStorm I get an compile error, but the code works...

ArrayObject __construct:

// read JSON
foreach ($jsonIterator as $key => $val) {

    if ($jsonIterator->getDepth()===0){

        $variable = new Preguntas_Educacion_V1($key);
        $this->offsetSet($variable->getColumn(),$variable);
    } else if ($jsonIterator->getDepth()===1){

        //Reflection!!! call setter dynamically by Val

        $function="set".ucfirst($key);
        $variable->$function($val);
    } else if ($jsonIterator->getDepth()===2){
            //Respuestas array
    }

    $counter++;
}

If it's been set in a previous iteration, it's still defined in the next iteration (its defined until the end of the script unless unset() or set equal to null), even if a different condition is met. If you want to read about scopes, this is a good thread for that. — Qirel
– Qirel, Commented Apr 17, 2017 at 18:22

Community · Accepted Answer · 2017-05-23 12:09:52Z

1

"The scope of a variable is the context within which it is defined. For the most part all PHP variables only have a single scope. ... However, within user-defined functions a local function scope is introduced."¹

Thus once the variable is defined (in the foreach loop) it will be visible in subsequent iterations.

You can disable warnings about undefined variables in PHPStorm. For more information, see this answer.

¹_{http://php.net/manual/en/language.variables.scope.php}

edited May 23, 2017 at 12:09

CommunityBot

11 silver badge

answered Apr 17, 2017 at 18:32

Sᴀᴍ Onᴇᴌᴀ

8,3028 gold badges38 silver badges61 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

variable scope method{foreach{if(){variable}else{}}}

1 Answer 1

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related