[PHP] Re: suppressing errors with @
Doesn't surpress output (in general)?
Variables don't usually produce an output so putting before it shouldn't
make any difference.
suppresses *ERROR* output, not just any old output.
echo foo;
will echo foo out.
echo $foo;
will echo out anything in $foo, but if you haven't *PUT* anything in $foo
yet, and if you have E_ALL turned on like you should, then the will
suppress the Warning: message.
can generally appear just about anywhere, and not necessarily just in
front of functions (unless this changed on purpose in 4.2 for some reason
beyond my ken) I don't use a whole lot, except for pg_fetch_row() where
you pretty much have to (ugh!)
Anyway, this is legal (or was before 4.2), if silly:
if ($foo){
}
Here, the test for $foo, which might not be set, will suppress the
Warning: about $foo not being set, because there is an in front of it.
Of course, you *OUGHT* to be using:
if (isset($foo)){
}
in the first place!
I dunno why the behaviour changed in the original post's case.
Might even be an actual bug...
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Re: [PHP] Re: suppressing errors with @
I use it in front of variables (never tried it on $GLOBALS, etc though)
eg: (using register_globals = on thingo - hey don't blame me, it's the
tech guys who have it on, and there's too much legacy code to turn it off :(
- anyway)
?
if ($var) { echo Yep, var is there; } else { echo nope; }
?
The risk is in hackers using an un-initialized $var to pass in their own
data.
If you've *correctly* programmed and caught *every* single case where that
might happen, by using isset() or even something like the above, only doing
something more useful, you're almost-for-sure okay.
register_globals off just annoys me since I *always* initialize variables,
and there's no point to me re-writing the tons of scripts for it, but that's
life.
That said, the sheer number of non-programmers writing PHP made
register_globals on a Bad Idea (tm) really...
I guess even some good programmers could occasionally miss a variable
initialization, though I never do :-)
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[PHP] Re: suppressing errors with @
Doesn't @ surpress output (in general)? Variables don't usually produce an output so putting @ before it shouldn't make any difference. Uri Even-Chen [EMAIL PROTECTED] wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... Hi, I tried to suppress warnings in isset expressions (Uninitialized string offset warnings). The original line was something like this: if (!(isset($GLOBALS['SPEEDY_GLOBAL_VARS']['PAGE_NAME']))) When I added the @ sign like this: if (!(isset(@$GLOBALS['SPEEDY_GLOBAL_VARS']['PAGE_NAME']))) My program stopped working, and I got errors like: PHP Parse error: parse error, expecting `T_VARIABLE' or `'$'' Eventually, I put the @ in this place: if (!(@isset($GLOBALS['SPEEDY_GLOBAL_VARS']['PAGE_NAME']))) Which works, but why didn't it work the other way? Is it some kind of PHP bug? I'm using PHP Version 4.1.2 Thanks, Uri. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
RE: [PHP] Re: suppressing errors with @
I use it in front of variables (never tried it on $GLOBALS, etc though)
eg: (using register_globals = on thingo - hey don't blame me, it's the
tech guys who have it on, and there's too much legacy code to turn it off :(
- anyway)
?
if (@$var) { echo Yep, var is there; } else { echo nope; }
?
-Original Message-
From: Scott Fletcher [mailto:[EMAIL PROTECTED]]
Sent: Saturday, July 06, 2002 7:32 AM
To: [EMAIL PROTECTED]
Subject: [PHP] Re: suppressing errors with @
No, it's not a PHP bug. The @ can not be used before a PHP variables, or
PHP pre-defined variables like $GLOBALS, $_SESSION, $_GET, $HTTP_POST_VARS,
etc. The @ is used only before the PHP function as far as I know of.
FletchSOD
Uri Even-Chen [EMAIL PROTECTED] wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
Hi,
I tried to suppress warnings in isset expressions (Uninitialized string
offset warnings). The original line was something like this:
if (!(isset($GLOBALS['SPEEDY_GLOBAL_VARS']['PAGE_NAME'])))
When I added the @ sign like this:
if (!(isset(@$GLOBALS['SPEEDY_GLOBAL_VARS']['PAGE_NAME'])))
My program stopped working, and I got errors like:
PHP Parse error: parse error, expecting `T_VARIABLE' or `'$''
Eventually, I put the @ in this place:
if (!(@isset($GLOBALS['SPEEDY_GLOBAL_VARS']['PAGE_NAME'])))
Which works, but why didn't it work the other way? Is it some kind of
PHP bug?
I'm using PHP Version 4.1.2
Thanks,
Uri.
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[PHP] Re: suppressing errors with @
No, it's not a PHP bug. The @ can not be used before a PHP variables, or PHP pre-defined variables like $GLOBALS, $_SESSION, $_GET, $HTTP_POST_VARS, etc. The @ is used only before the PHP function as far as I know of. FletchSOD Uri Even-Chen [EMAIL PROTECTED] wrote in message [EMAIL PROTECTED]">news:[EMAIL PROTECTED]... Hi, I tried to suppress warnings in isset expressions (Uninitialized string offset warnings). The original line was something like this: if (!(isset($GLOBALS['SPEEDY_GLOBAL_VARS']['PAGE_NAME']))) When I added the @ sign like this: if (!(isset(@$GLOBALS['SPEEDY_GLOBAL_VARS']['PAGE_NAME']))) My program stopped working, and I got errors like: PHP Parse error: parse error, expecting `T_VARIABLE' or `'$'' Eventually, I put the @ in this place: if (!(@isset($GLOBALS['SPEEDY_GLOBAL_VARS']['PAGE_NAME']))) Which works, but why didn't it work the other way? Is it some kind of PHP bug? I'm using PHP Version 4.1.2 Thanks, Uri. -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
