Error in page when checking http_get_vars("myvar") and "myvar" was not passed in URL string

[John Pastrovick]

I am new to PHP, coming from ASP coding

if (HTTP_GET_VARS['b']==1){
print "Yes";
}else{
print "No";
}

when "b" is not passed via
(http://www.mydomain.com?b=1

an error occurs and the "NO" is printed but an error is printed too.

How can I check for the value of "b" so that no error occurs if b is
not passed??

example

http=www.mydomain.com

$myvar=HTTP_GET_VARS['b']

causes an error because
"b" does not exist (ie. its not passed in the URL string.

$myvar maybe evaluated as NULL or Empty but the error is printed in
the page, anyway.
thanks

[Cameron]

John Pastrovick wrote:

I am new to PHP, coming from ASP coding

if (HTTP_GET_VARS['b']==1){
print "Yes";
}else{
print "No";
}

when "b" is not passed via
(http://www.mydomain.com?b=1

an error occurs and the "NO" is printed but an error is printed too.

How can I check for the value of "b" so that no error occurs if b is
not passed??

example

http=www.mydomain.com

$myvar=HTTP_GET_VARS['b']

causes an error because
"b" does not exist (ie. its not passed in the URL string.

$myvar maybe evaluated as NULL or Empty but the error is printed in
the page, anyway.
thanks

First of all $HTTP_GET_VARS is old you should use $_GET['b'] now and in
answer to your question

if (!isset($_GET['b']))
print "b isn't set!";

[Phil Roberts]

With total disregard for any kind of safety measures
pa*********@hotmail.com (John Pastrovick) leapt forth and uttered:

I am new to PHP, coming from ASP coding

if (HTTP_GET_VARS['b']==1){
print "Yes";
}else{
print "No";
}

when "b" is not passed via
(http://www.mydomain.com?b=1

an error occurs and the "NO" is printed but an error is printed
too.

How can I check for the value of "b" so that no error occurs if
b is not passed??

example

http=www.mydomain.com

$myvar=HTTP_GET_VARS['b']

causes an error because
"b" does not exist (ie. its not passed in the URL string.

$myvar maybe evaluated as NULL or Empty but the error is printed
in the page, anyway.
thanks

All variables and arrays in PHP must be prefixed with the $ glyph.
So it should be $HTTP_GET_VARS['b'], which is a deprecated array
anyway as the other poster said.

--
Phil Roberts | Nobody In Particular | http://www.flatnet.net/