Run »
<!DOCTYPE html> <html> <body> <?php $a = "Hello world!"; echo "The value of variable 'a' before unset: " . $a . "<br>"; unset($a); echo "The value of variable 'a' after unset: " . $a; ?> </body> </html>
The value of variable 'a' before unset: Hello world!
The value of variable 'a' after unset: