如何从网站获取源代码并通过'highlight_string'？

Am getting the source-code of a page but how to get it through the syntax highlighter and then spit it out?

<?php 

echo htmlentities( file_get_contents( 'http://www.example.com/post/' ) ); 

highlight_string('http://www.example.com/post/');

?>

this function does exactly what you want: highlight_file($filename)

php.net/highlight_file