PHP Local Variable

PHP Local Variables :

  1. A Variable which is declared inside the function or any block is called as local variable.
  2. Local Variable has access or life only within that function.
  3. Local Variable cannot be accessed from outside.

Consider the following Example -

PHP Local Variable Example :

<!DOCTYPE html>
<html>
<body>
<?php
$num = 4;
function printMsg() {
  $num = 0; 
  echo "\$num inside function : $num";
  echo "<br />";
}
printMsg();
echo "\$num outside function : $num";
?>
</body>
</html>

Output :

$num inside function : 0 
$num outside function : 4

Explanation :

In the above example we have just declared one variable outside the function and another variable inside the function.

function printMsg() {
  $num = 0; 
  echo "\$num inside function : $num";
  echo "<br />";
}

When the method gets called then variable having the local value will be printed instead of the global value. so inside the function local value 0 gets printed.

echo "\$num outside function : $num";

When control is outside the function then outer value i.e 4 will be printed.