PHP Tag Styles

Short style
Order processed."; ?>
XML style
Order processed."; ?>
This style of tag can be used with XML (Extensible Markup Language) documents. If you plan to serve XML on your site, you should use this style of tag.
SCRIPT style
echo "Order processed.";
ASP style
Order processed."; %>      
This style of tag is the same as used in Active Server Pages (ASP). It can be used if you have enabled the asp_tags configuration setting. You might want to use this style of tag if you are using an editor that is geared towards ASP or if you already program in ASP.