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PHP PHP Functions Introducing Functions Introducing Functions

Posted by Stefano Salazar
Stefano Salazar
924 Points

Can someone explain to me more details about ¨global¨ in php

I don't Understand very well that global statement :(

1 Answer

filipepacheco
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filipepacheco
Full Stack JavaScript Techdegree Student 21,416 Points
filipepacheco
.a{fill-rule:evenodd;}techdegree
filipepacheco
Full Stack JavaScript Techdegree Student 21,416 Points

Hi Stefano Salazar , when you have a function, anything that is inside it, is specifically for that function. If you want to get something that is outside, to use inside that function, such as a variable, you use the "global" statement. Basically, you use the "global" statement to get anything that is outside, to use inside the function.

In the following example, $current_user is a variable created and used outside the is_mike() function. So for that function to know who the current user is, you need to use it inside the function, and for that you use the global statement followed by the variable name.

$current_user = 'Hampton';

function is_mike(){
  global $current_user;
  if($current_user == 'Mike'){
    echo 'It is Mike!';  
  } else {
    echo 'Nope, it is not Mike.';  
  }
}

is_mike();
Stefano Salazar
Stefano Salazar
924 Points

Thanks Filipe! :) got it now!