If null use other variable in one line in PHP

Question

Is there in PHP something similar to JavaScript\'s:

alert(test || \'Hello\');

So, when test is undefined or null we\'ll see Hello, otherwis

Answer 1

I'm very surprised this isn't suggested in the other answers:

echo isset($test) ? $test : 'hello';

From the docs isset($var) will return false if $var doesn't exist or is set to null.

The null coalesce operator from PHP 7 onwards, described by @Yamiko, is a syntax shortcut for the above.

In this case:

echo $test ?? 'hello';