PHP Global Variables

Hello folks! welcome back to a new edition of our tutorial on PHP. In this tutorial guide, we will be discussing about the PHP Global Variables.

A global variable in PHP can be accessed in any part of the program. Nevertheless, to be modified, a global variable must be explicitly declared to be global in the function in which it is to be modified. This can be effortlessly achieved by placing the keyword GLOBAL in front of the variable that should be identified as global.

Placing this keyword in front of an already existing variable informs PHP to make use of 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

READ: PHP Function Parameters

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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