PHP Global Variables



Hello dear readers! welcome back to another section of our tutorial on PHP. In this tutorial guide, we will be discussing about the PHP Global Variables.

Unlike the local variables, a global variable can be accessed in any part of the program. However, in order for the modification to take place, a global variable must be precisely declared to be global in the function in which it is to be modified. This can be conveniently achieved by placing the keyword GLOBAL in front of the variable that should be identified as the global variable.

Placing this keyword in front of an already existing variable tells PHP to use the variable having that name.

Example

The following below is a simple example -

<?php
   $somevar = 30;
   
   function addit() {
      GLOBAL $somevar;
      $somevar++;
      
      print "Somevar is $somevar";
   }
   
   addit();
?>

Output

When the above code is executed, it will produce the following result -

Somevar is 31


Alright guys! This is where we are rounding up for this tutorial post. In our next tutorial guide, we are going to be discussing about the PHP Function Static Variables.

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