Python supports global scope of variable but Php doesn't supports global scope variables inside a function without using the global keyword?

Question

<?php
   $a ="helllo welcome to php! ....:)"; 
   function msg(){ 
       /* global $a; */
       echo $a;
   } 
   msg();
?>

Global variable $a is not accessible inside the function msg() but when i use global $a then it is accessible, i want to know that it is accessible or not without using global keyword inside or outside the function for the particular variable

✔ In python, it's accessible even without using the global keyword ✔

You are correct. Either pass the variables as arguments to the function or use the `global` keyword to allow them into scope of the function — Professor Abronsius, Jun 15 '22 at 08:32
ok @ProfessorAbronsius it means that php doesn't supports global scope variables without using global keyword — Shubham-Misal, Jun 15 '22 at 08:36
@ibra i want to call $a variable without passing it inside the function — Shubham-Misal, Jun 15 '22 at 08:37
php doesn't supports global scope of variable without using global keyword — Shubham-Misal, Jun 15 '22 at 08:45
There is no logic here. if variables were accessible without the global keyword, what would be the reason to have this keyword at all? — Your Common Sense, Jun 15 '22 at 09:09
@YourCommonSense see the last image updated with the python code where the variable a is accessible inside the function msg() even without using the global keyword ....... :) :) :) — Shubham-Misal, Jun 15 '22 at 09:15
@Your In Python, `global` is only needed if you want to *assign* to the variable from within the function, but it’s readable without it. But PHP isn’t Python… — deceze, Jun 15 '22 at 09:25

score -1 · Accepted Answer · answered Jun 15 '22 at 08:37

-1

Why did you commented global $a ?

<?php
   $a ="helllo welcome to php! ....:)"; 
   function msg(){ 
       global $a;
       echo $a;
   } 
   msg();
?>

answered Jun 15 '22 at 08:37

ibra

390
3
13

actually I know this – Shubham-Misal Jun 15 '22 at 08:42

score -1 · Answer 2 · answered Jun 15 '22 at 08:42

If you want to check for the variable's availability then your can use isset($a).

I'm going to be honest and say that you shouldn't do that though. It doesn't make sense in any way.

The functions scope doesn't change and suddenly allow for the $a to be available. You should either use the global keyword, or pass the variable as an argument to the function.

Python supports global scope of variable but Php doesn't supports global scope variables inside a function without using the global keyword?

2 Answers2