supress errors at the page level? Undefined index errors.

[LRW]

I'm creating a simple reply form, and if a form item isn't answered I
get an error:
"Notice: Undefined index: rb_amntspent in
c:\inetpub\wwwroot\mackinaw\survey.php on line 36"
even if in the code I allow for an unselected item. (Code at the
bottom here.)
It works fine otherwise.

Now in the past I've made a change to php.ini to repress errors, but
for this project I don't have access to the php.ini.
Is there a way to supress errors on that page for that session?

Or, is there a way to just not get that error at all?

Thanks!
Liam

Here's a sample of the code that gets the form response. If an item is
selected, no error for that question, but if an item is not selected I
get the error above even though I still get a successful echo for the
"else" or "default" option which occurs if nothing is selected:

$rb_visited = $_POST["rb_visited"]; //Have you ever visited Mackinaw
City, Michigan?
if ($rb_visited == "1") {
$rb_visited_reply = "Yes";
} elseif ($rb_visited == "0") {
$rb_visited_reply = "No";
} else {
$rb_visited_reply = "You did not answer this question";
};

$rb_lastvisit = $_POST["rb_lastvisit"]; //When was your last visit to
Mackinaw ity?
switch ($rb_lastvisit) {
case "1":
$rb_lastvisit_reply = "Earlier this year (2003)";
break;
case "2":
$rb_lastvisit_reply = "Last year (2002)";
break;
case "3":
$rb_lastvisit_reply = "2 years ago (2001)";
break;
case "4":
$rb_lastvisit_reply = "3 years ago (2000)";
break;
case "5":
$rb_lastvisit_reply = "4 or more years ago (1999)";
break;
default:
$rb_lastvisit_reply = "You did not answer this uestion";
}

[Pedro]

LRW wrote:

I'm creating a simple reply form, and if a form item isn't answered I
get an error:
"Notice: Undefined index: rb_amntspent in
c:\inetpub\wwwroot\mackinaw\survey.php on line 36"
even if in the code I allow for an unselected item. (Code at the
bottom here.)

You can do it (at least) one of two ways (I prefer the first):

<?php
$arr['unset1'] = 1;
# $arr['unset2'] = 2;
$arr['unset3'] = 3;

// method 1
if (isset($arr['unset2']) {
$var = $arr['unset2'];
} else {
$var = 'impossible value';
}
// now test $var

// method 2
$var = @$arr['unset2'];
// now test $var; if $arr['unset2'] is undefined $var will be ''
?>
HTH

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