PHP 5.6

call.php

<?php

class Variadic {
	function say(...$messages) {
		foreach ($messages as $message) {
			echo $message . " ";
		}
		echo "\n";
	}
}

$object = new Variadic();
$messages = ['I', 'Love', 'You'];
$object->say(...$messages);

?>

scalar.php

<?php
const ONE = 1;
// Scalar Expression in constant
const TWO = ONE * 2;
 
class HelloWorld {
    // Scalar Expression in Property    
    const THREE = TWO + 1;
     
    // Scalar Expression in Methods
    public function hello($a = ONE + self::THREE) {
        return $a;
    }
}
 
echo (new HelloWorld)->hello()."\n";
 
?>

variadic.php

<?php

class Variadic {
	function say(...$messages) {
		foreach ($messages as $message) {
			echo $message . " ";
		}
		echo "\n";
	}
}

$object = new Variadic();
$object->say("I");
$object->say("I", "Love");
$object->say("I", "Love", "You");

?>