Expand PHP functions in strings just like variables

Question

In PHP I can say

$noun = "bird";
$adjective = "warm;
echo <<<EOT
The $noun is very $adjective
EOT;

and it will output

The bird is very warm

Is there a way to do this with functions?

function getNoun() { return "bird"; }
function getAdjective() { return "warm"; }
echo <<<EOT
The getNoun() is very getAdjective()
EOT;

and output

The bird is very warm

Answer 1

You can use variable functions, though they're rather frowned on upon as they're not far different from variable variables...

$a = 'getNoun';
$b = 'getAdjective';
echo <<<EOT
The {$a()} is very {$b()}
EOT;