Question

Say I have…

function one($x){
     return $a + $x;
}

function two(){
     $a = 5;
     echo one(3);
}

Will this show the answer “8” or “3”? In other words, will function one get the value of $a or do I need to declare it global somewhere?

N.B. I haven’t tried it yet, but I’m asking it here to understand WHY it acts one way or the other.

Answer 1

No function one does not know about $a. But this can be done.

$a = 5;

function one($x){
 global $a;
 return $a + $x;
}

function two(){
 global $a;
 $a = 5;
 echo one(3);
}

Now two() would echo 8