x
<html><body> $x = "Hello world!";$y = 'Hello world!';var_dump($x);echo "<br>"; var_dump($y);</body></html>
string(12) "Hello world!"
string(12) "Hello world!"
string(12) "Hello world!"
<html><body> $x = "Hello world!";$y = 'Hello world!';var_dump($x);echo "<br>"; var_dump($y);</body></html>