Call a function inside a class method and use its variables

Question

I'm new to PHP, i made some research but couldn't find a clear answer. In a functions.php file i have a function that contains some variables that i need, and a classes.php file containing a class with a method that needs the values from the variables of the function in functions.php. The Question is: why the echoed variable is outputted but the other variables are called as Undefined.And how can i call and use them.

Example:

functions/functions.php

<?php
// functions.php file

function incFunc(){
    $inc_var1 = "Marco";
    echo $inc_var1; //this variable output Marco without problem
    echo "<br>";
    echo "<br>";
    $inc_var2 = "Polo"; //this is the variable i want to use in the class method.
}
?>

classes/classes.php

<?php
// classes.php file

include '../functions/functions.php';
class theClass
{   
    public function classFunc(){
        incFunc();
        echo $inc_var2; //Notice: Undefined variable: inc_var2
    }
}
$obj = new theClass();
$obj->classFunc();
?>

Outputs:

Marco

Notice: Undefined variable: inc_var2 in...

functions have their own scope - all you do is execute the first function, where you echo the first var inside the first function. — treyBake, Oct 09 '19 at 14:02
thank you for your answer, i couldn't find or i guess i have missed out to find the answer in other already existing questions here. — Alex.sandar, Oct 09 '19 at 14:50

score 0 · Accepted Answer · answered Oct 09 '19 at 14:09

If you want to use variables from incFunc function scope in the class you have to return the value Example:

function incFunc($returnVar){
   $inc_var1 = "Marco";
   $inc_var2 = "Polo";
   if ($returnVar == 'var1') {
      return $inc_var1;
   } else {
      return $inc_var2;
   }
}

Than,in your class method, save the result of a function in an variable:

public function classFunc(){
    $inc_var1 = incFunc('var1');
   // do stuff
}

This is just a basic example, if you want to include multiple variables at once, you can return an array instead of single variables.

Thank you for your time to answer my question its just what i was asking. — Alex.sandar, Oct 09 '19 at 14:45

Call a function inside a class method and use its variables

Example:

1 Answers1