{{: }} is a much concise directive that is an alternative to the
@php: and @php; directive.
Unlike the placeholder directive {{ }} which is used to display the content of a
particular value, the php braces handles every item within it as a normal php code just as the
@php: directive does. An example is shown below:
{{:
$a = '123';
$b = '456';
echo( $a + $b ); //579
}}
579