``++echo++`` can be called with or without parentheses, but it is best practice to leave parentheses off the call because using parentheses with multiple arguments will result in a parse error. == Noncompliant Code Example [source,php] ---- echo("Hello"); // Noncompliant, but it works echo("Hello", "World"); // Noncompliant. Parse error ---- == Compliant Solution [source,php] ---- echo "Hello"; echo "Hello","World!"; ---- ifdef::env-github,rspecator-view[] ''' == Implementation Specification (visible only on this page) include::message.adoc[] ''' == Comments And Links (visible only on this page) include::comments-and-links.adoc[] endif::env-github,rspecator-view[]