A little doubt about pseudo-static

I understand the pseudo-static function, such as to access the a.php you just input a.html can go to a.php page
My doubts now are
If there is a hyperlink to jump to a.php that address bar is written a.php or write a.html?
or 2, all right?
I personally think that is pseudo-static is to rewrite the URL address with regular expressions to replace
If the inside to write a.php that user access to the next page in the address bar is not still not implemented static?
If you write a.html, then all hyperlinks need to be modified?
Did I get the wrong idea?
Or did you write a a.php that he couldn't jump to a.php?
About pseudo-static this piece is a little dizzy only to know that the URL is replaced.

Reply to discussion (solution)

Write two or two.
Pseudo-static white is address spoofing, conducive to SEO.

If there is a hyperlink to jump to a.php that address bar is written a.php or write a.html?
Write a.html. If you write a.php, then there is no need to do pseudo-static.

You can interpret pseudo-static as the alias of a real path.

 
 
  
  Rewriteengine onrewriterule ^a\.html$ a.php [NC]
 
 

That's the equivalent of a name, a nickname, hyperlinks can be identified?

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