PHP's most used variable scopes are: - local - global A variable declared outside a function has a GLOBAL SCOPE and can only be accessed outside a function:

<?php
   $name = "Tornike";  // global scope
   function greeting() {
     echo "Hello " . $name . "!"; // using $name will generate an error
   } 
   greeting();

   echo "Hello" . $name . "!"; // using $name will generate output (Hello Tornike!)
?>

A variable declared within a function has a LOCAL SCOPE and can only be accessed within that function:

<?php
   function greeting() {
     $name = "Tornike";  // local scope
     echo "Hello " . $name . "!";  // using $name inside the function will generate output (Hello Tornike!)
   } 
   greeting();

   echo "Hello" . $name . "!"; // using $name outside the function will generate an error
?>