Re: include file identifier

On Sat, February 3, 2007 7:05 pm, Eli wrote: > Does any included file in PHP have a unique identifier? (like a stack > of > includes identifier). Down in the guts of PHP source, there may be some kind of file handler which is unique... But nothing I'm aware of exposes this to <?php ?> code in any way, other than http://php.net/include_once > If the files names are different, then __FILE__ can be used as an > identifier. But if a file was included by itself, then __FILE__ is the > same, tho there are 2 different includes of the same file. > > Example: > === a.php > <?php > echo "\nRunning ".__FILE__." (id=X)!\t"; > if (!$visited) { > echo "You are visiting here!"; > $visited = true; > include(__FILE__); > } > else { > echo "You have been already visiting here! (Bye)"; > } > ?> > > -thanks, Eli If you want to avoid the overhead of include_once, it's a pretty common practice (borrowed from C .h files) to do: if (!defined('FILENAME')){ define('FILENAME', 1); //rest of code here } It is entirely up to YOU to make sure FILENAME is unique for your application/project... Which can become problematic when integrating large packages. -- Some people have a "gift" link here. Know what I want? I want you to buy a CD from some starving artist. http://cdbaby.com/browse/from/lynch Yeah, I get a buck. So?