var_dump returns the value of the expression, in this case, is_admin returns the boolean value of true if you are on an admin page
not a wordpress question –
look into documentation of html tags; for instance http://www.w3schools.com/html/
and/or php functions
http://www.w3schools.com/php/
or
http://www.php.net/manual/en/index.php
http://www.w3schools.com/tags/tag_pre.asp
Text in a pre element
is displayed in a fixed-width
font, and it preserves
both spaces and
line breaks
http://php.net/manual/en/function.var-dump.php
http://codex.ww.wp.xz.cn/Function_Reference/is_admin
What’s google for if not for these questions?
[topic closed as not wordpress related]
