The most portable version of PHP tag that is compatible to embed in XML or XHTML too is:

Keep practicing — related questions

• The PHP syntax is most similar to:
• What is the problem with =$expression ?> ?
• XML is a replacement for HTML?
• Which of the following is not a PHP tag?
• The XML declaration is which of the following?
• XML can only be transformed into HTML or XHTML.
• XML?
• Which tag used for client side xml validation