Hmm. I'm confused.
This page...
http://uk.php.net/manual/en/language.operators.errorcontrol.php
...says that you can prepend the @ operator to a variable. So with
@$_GET['this'] it should suppress the NOTICE error if 'this' doesn't exist.
I've done some testing:
Test #1
error_reporting(E_ALL);
echo $_GET['test'];
This generates an on-screen error.
Test #2
error_reporting(E_ALL);
echo @$_GET['test'];
The error is suppressed.
If I elect to use a custom error handler then i always get an error
generated. It makes no difference what the error level is or whether I use
the @ operator.
set_error_handler("CustomErrorHandler");
error_reporting(E_ALL);
echo @$_GET['test'];
set_error_handler("CustomErrorHandler");
error_reporting(0);
echo @$_GET['test'];
set_error_handler("CustomErrorHandler");
error_reporting(E_ALL);
echo $_GET['test'];
set_error_handler("CustomErrorHandler");
error_reporting(0);
echo $_GET['test'];
They all have the same result.
I suppose I could handle this in my error handling function, ignoring any
NOTICE errors, but ideally I'd like to leave it as-is and suppress them when
referencing.
I'm not sure if I'm making much sense. Any help appreciated!
Cheers,
Ben
----- Original Message -----
From: "Stuart" <[EMAIL PROTECTED]>
To: "Ben Joyce" <[EMAIL PROTECTED]>
Cc: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Monday, March 15, 2004 12:11 PM
Subject: Re: [PHP] use of @ operator to suppress errors
> Ben Joyce wrote:
> > i'm using error_reporting(0) and set_error_handler("MyErrorHandler") to
> > manage my errors but I'm getting situations where a NOTICE error is
thrown.
> >
> > For example if I refer to $_GET['this'] when there is no 'this'
querystring
> > key then i get the error.
> >
> > I've tried using @$_GET['this'] but it makes no difference.
> >
> > Is this normal?
>
> Yes it is. When you use set_error_handler all errors, warnings and
> notices cause your handler to be called. To detect the use of the @
> prefix check the value of error_reporting in your handler - it will be 0
> if @ has been used.
>
> Richard Davey wrote:
> > Yes because @ suppresses the errors on function calls, not variables
> > (which is all $_GET['this'] is).
>
> On the contrary, the @ prefix suppresses all errors for the block of
> code it precedes where a block is a function or variable. Essentially it
> sets error_reporting to 0 while it evaluates that block.
>
> --
> Stuart
>
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