View source of PHP, Javascript, and HTML?

I've got a .php file with javascript, php, and html. I want to include a button/link to view the source of the entire file "pretty pri开发者_StackOverflownted", but I can't seem to get anything to work. What is the best way to do this?

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Some combinations of Apache/PHP are configured so that files ending in .phps aren't run as PHP, but instead, highlighted and prettified.

Example:

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If you simply want to display the code of the file, you can call this function:

function echoFile($pathToFile){

  $handle   = fopen($pathToFile, "r");
  $contents = fread($handle, filesize($pathToFile));
  fclose($handle);
  $contents = str_replace("<", "&lt;", $contents);
  $contents = str_replace(">", "&gt;", $contents);
  echo "<pre>$contents</pre>";
}

So, if you want to display myPhpFile.php, just do

echoFile("myPhpFile.php");

As far as making it prettified, follow the link that was commented.