Web Design References Web Design Glossary - A Web page or HTML
document is considered valid when it complies with World Wide
Web Consortium recommendations. - Validation is the process of
verifying that markup, cascading style sheets, etc. comply with
World Wide Web Consortium recommendations. You can use the
Validator to verify that your pages meet the standards. It is
important to use structural markup according to published formal
grammars. For more information consult CSS a value is a length,
quality, type or URL assigned to a style property for an
element. CSS properties each have specific ranges of value or
token types, which may be declared for them. - In programming,
variables represent data. Like all programming languages, PHP
allows you to store bits of data in variables, and then to
access that data by writing the variable's name. A variable is
probably most simply explained as an area of memory set aside to
store information, and it is assigned a particular identifier by
the programmer. In PHP all