Question

Is it possible to execute a function, then return a new value for Var and therefore when it tries to loop again it checks the condition and detects the changes?

---

Let’s say I have this function:

   function changeZ(){
   $z=1
   return $z;      
   }

and this is my while loop:

$a = 0;
$z = 10;
while($a<$z){
changeZ();
$a++;
}

How should I modify the codes such that

the function changeZ() returns a new value for the variable $z

and therefore when the loop checks for condition (1<1), it returns a false and stop looping.

Answer 1

You can pass by reference or return the value

$z = 100;
change($z);

function change(&$var) {
  $var = 1;
}

$z = 100;
$z = change($z);
function change($var) {
  return $var * 100 - 50;// Logic with $z obviously can be whatever
}