Get variable inside of a external function

[Alex1234]

Hi everyone, i am closing my recent problems with some code, this should be the last doubt, thanks for all the helpers in recent doubts that i created.

well, the code is here:


main.php

<?php
    require_once 'functions.php';
    $Var = 1;
    
    $UserFunctions = new User(); 
    $UserFunctions->MyVar();
?>

functions.php

class User {

    public function MyVar() {

        if ($Var == 1) {
            echo "Yes";
        }

        else {
            echo "no";
        }
    }
} 

well, it give a error on functions.php and say "Undefined variable:Var"

This part is really very important, anyone can give me some help? Thanks community

[eval(BadCode)]

When you're inside the scope of a function you CAN NOT see variables defined in the global scope (without defining them as "global").

Perhaps rewriting that variable into the constructor would help:

class User {
    private $myVar;

    public function __construct($myVar) {
      $this->myVar = $myVar;
    }

    public function myVar() {
      return $this->myVar == 1 ? true : false;
    }
} 

foreach(array(new User(1), new User(3)) as $user) 
  echo ($user->myVar() === true ? "yes" : "no"), "\n"; 

But basically, you're completely ignoring the SCOPE. OOP/SCOPE is important because it helps with encapsulation. Although, traditionally programming was "data structures" and "functions"; OOP combines both of these into a single "class".

Edit: not everything I said here is 100% true, there are some hacks in PHP that I did not mention; but I suspect they'll only make a HUGE mess out of your code.

[Alex1234]

When you're inside the scope of a function you CAN NOT see variables defined in the global scope (without defining them as "global").

Perhaps rewriting that variable into the constructor would help:

class User {
    private $myVar;

    public function __construct($myVar) {
      $this->myVar = $myVar;
    }

    public function myVar() {
      return $this->myVar == 1 ? true : false;
    }
} 

foreach(array(new User(1), new User(3)) as $user) 
  echo ($user->myVar() === true ? "yes" : "no"), "\n"; 

But basically, you're completely ignoring the SCOPE. OOP/SCOPE is important because it helps with encapsulation. Although, traditionally programming was "data structures" and "functions"; OOP combines both of these into a single "class".

Edit: not everything I said here is 100% true, there are some hacks in PHP that I did not mention; but I suspect they'll only make a HUGE mess out of your code.

Problem resolved Thanks