On Tue, March 20, 2007 11:08 am, Ford, Mike wrote: >> what do you want with that '@' here? >> that operator can be used to suppress error messages when calling >> functions but not when using a variable
This is most definitely way wrong. > What complete tosh! @ is a unary operator, so can be applied to any > expression. > > Proof: > > <?php > echo "no @ --", $HTTP_GET_VARS['bogus'], "<br />\n"; > echo "with @ --", @$HTTP_GET_VARS['bogus'], "<br />\n"; > ?> > > Result: > > no @ -- > Warning: Undefined index: bogus in > c:\www-lco\scripts_etc\lco\php\test.php on line 18 > > with @ -- > > > Also: > > <?php > $a = 123; > echo "no @ --", $a/0, "<br />\n"; > echo "with @ --", @($a/0), "<br />\n"; > ?> > > Result: > > no @ -- > Warning: Division by zero in c:\www-lco\scripts_etc\lco\php\test.php > on line 19 > > with @ -- > > > Not that I'm necessarily advocating this as a technique, but let's not > spread disinformation! While it has now been proven that @ is "more" than a function error-suppressant, I suspect it may technically be a Language Construct rather than a simple unary operator... Not that I can come up with anything yet to prove it, as all my examples so far were total syntax errors... Although I did find an interesting anomoly... What would you expect this to output? <?php @ ?> Hint: I figured it would apply the @ to no expression at all and do nothing. I was wrong. I suppose I could try to read PHP source and figure all this out someday... -- 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? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
