Re: Notice errors with set_error_handler

Hi John!

On Thu, 24 Jul 2003 20:03:08 +0200, "JohnVT" <johnN0SPAM@foobar.nl>
wrote:

>(Crossposted from alt.comp.lang.php)
>
>Questions in comments.
>
>Thanks you.
>
>Greetings,
>
> - John
>
><?
>error_reporting (E_ALL);
>
>function myErrorHandler($errno, $errstr, $errfile, $errline) {
> echo "<br>Error number $errno \"$errstr\" in $errfile on line
>$errline.<br>";
>}
>
>$x = $a;
>@$x = $b;
>
>set_error_handler("myErrorHandler");
>$x = $c;
>@$x = $d;
>
>/*
>
>Displays:
>
>Notice: Undefined variable: a in
>c:\data\htdocs\projects\photobook\testerror.php on line 8
>Error number 8 "Undefined variable: c" in
>c:\data\htdocs\projects\photobook\testerror.php on line 11.
>Error number 8 "Undefined variable: d" in
>c:\data\htdocs\projects\photobook\testerror.php on line 12.
>
>1) Why does it fall over @$x = $d (with my own error handler) and not over
>@$x = $b with the standard error handler?

What is the setting of error_reproting without your error_handler?

>2) From the manual I understood only E_USER_* errors were handled by the
>set_error_handler. Why is E_NOTICE given to myErrorHandler()?

AFAIK, all errors, which are not fatal are given to the users error
handler. You want to use it to handle errors of xxsql_functions, if
there is a problem with the database for example.

HTH, Jochen

--
Jochen Daum - CANS Ltd.
PHP DB Edit Toolkit -- PHP scripts for building
database editing interfaces.
http://sourceforge.net/projects/phpdbedittk/

Thanks for your reply Jochen.

I understand error handling better now.

I was wrong about the error types that are handled by your own error
handler; E_USER_*, E_WARNING and E_NOTICE will be handled by your own
handler, the others will be handled by the standard handler.

About the other question: With set_error_handler() you bypass the standard
error handler. The standard error handler exits after a fatal error, let you
use @maybe_goes_wrong(), etc. So you'd have to take care of these things
yourself in your own error handler.

So when I use my own error handler and I try ...

---
if (!($fp = @fopen('not_a_file', 'r')))
trigger_error("Can't open file!", E_USER_WARNING);
---

.... I get ...

---
Warning: fopen("not_a_file", "r") - No such file or directory in
c:\data\htdocs\projects\photobook\newindex.php on line 19.

User Warning : Can't open file! in
c:\data\htdocs\projects\photobook\newindex.php on line 20.
---

Any idea how to keep using @ with your own error handler?

Thanks,

- John

"Jochen Daum" <jochen.daum@cans.co.nz> wrote in message
news:evh0ivoq9rg8gve62tpimcjih2r8o4vd5d@4ax.com...
> Hi John!
>
> On Thu, 24 Jul 2003 20:03:08 +0200, "JohnVT" <johnN0SPAM@foobar.nl>
> wrote:
>
> >(Crossposted from alt.comp.lang.php)
> >
> >Questions in comments.
> >
> >Thanks you.
> >
> >Greetings,
> >
> > - John
> >
> ><?
> >error_reporting (E_ALL);
> >
> >function myErrorHandler($errno, $errstr, $errfile, $errline) {
> > echo "<br>Error number $errno \"$errstr\" in $errfile on line
> >$errline.<br>";
> >}
> >
> >$x = $a;
> >@$x = $b;
> >
> >set_error_handler("myErrorHandler");
> >$x = $c;
> >@$x = $d;
> >
> >/*
> >
> >Displays:
> >
> >Notice: Undefined variable: a in
> >c:\data\htdocs\projects\photobook\testerror.php on line 8
> >Error number 8 "Undefined variable: c" in
> >c:\data\htdocs\projects\photobook\testerror.php on line 11.
> >Error number 8 "Undefined variable: d" in
> >c:\data\htdocs\projects\photobook\testerror.php on line 12.
> >
> >1) Why does it fall over @$x = $d (with my own error handler) and not
over
> >@$x = $b with the standard error handler?
>
> What is the setting of error_reproting without your error_handler?
>
> >2) From the manual I understood only E_USER_* errors were handled by the
> >set_error_handler. Why is E_NOTICE given to myErrorHandler()?
>
> AFAIK, all errors, which are not fatal are given to the users error
> handler. You want to use it to handle errors of xxsql_functions, if
> there is a problem with the database for example.
>
> HTH, Jochen
>
> --
> Jochen Daum - CANS Ltd.
> PHP DB Edit Toolkit -- PHP scripts for building
> database editing interfaces.
> http://sourceforge.net/projects/phpdbedittk/