The show_source() function prints out a syntax higlighted version of the code contained in filename using the colors defined in the built-in syntax highlighter for PHP.
If the second parameter return is set to TRUE then show_source() will return the highlighted code as a string instead of printing it out. If the second parameter is not set to TRUE then show_source() will return TRUE on success, FALSE on failure.
Note: The return parameter became available in PHP 4.2.0. Before this time it behaved like the default, which is FALSE
This function is an alias for the function highlight_file()
Note: Care should be taken when using the show_source() and highlight_file() functions to make sure that you do not inadvertently reveal sensitive information such as passwords or any other type of information that might create a potential security risk.
See also highlight_string(), highlight_file().