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<!DOCTYPE html>
<html>
<body>
​
<?php
function myTest() {
  $x = 5; // local scope
  echo "<p>Variable x inside function is: $x</p>";
} 
myTest();
​
// using x outside the function will generate an error
echo "<p>Variable x outside function is: $x</p>";
?>
​
</body>
</html>
​

Variable x inside function is: 5

Variable x outside function is: