如何在另一个函数php中使用变量

Question

 function pokemon1()
{ 
include 'details.php';
 $path = $_SESSION['path'];
 $health = $_SESSION['health'];
 echo "<br />";
 echo $path;
 echo "<br />";
 echo $health;
}


function pokemon2()
{
include 'details.php';
 $flag =  $_SESSION['flag'];
 $damage = $_POST['attack']; 
 $oppo_health = $_SESSION['oppo_health']; 

 $oppo_path = $_SESSION['path'];
 echo "<br />";
 echo $oppo_path;
 echo "<br />"; 
   $oppo_health = $oppo_health - $damage;
  echo $oppo_health;
 $_SESSION['attack'] = $damage; 
 $_SESSION['oppo_health'] = $oppo_health;

}

How can I use the $path variable of function pokemon1() in function pokemon2()??? I tried declaring outsite the function with "global" but still its showing undefined!

Answer 1

You have to set the variable inside Pokemon 1 to global, after you do that, make sure you call function Pokemon 1 first, else the variable inside pokemon 2 with the variable from pokemon 1 will be undefined.

Also, why don't you just declare the variable outside the scope of a function?

 $path = "";

function pokemon1(){
    ....
    global $path...;
}

function pokemon2(){
   ....
  global $path...;
}