Use of uninitialized value with eq, ne, chomp .. etc

[jerehart]

Hey,

I am getting these weird warnings when I use comparisons (of strings) and work on strings. my script wasn't working so I did a perl -w myscript.cgi and I get warnings of the type:

Use of uninitialized value in string eq at readdata.pm line 6.

where that line is
(from readdata.pm line 6)
if ($ENV{'REQUEST_METHOD'} eq 'GET')

and I also get this from a bunch of things, like ==, split, join etc ....

the #! is correct, any ideas?

 

[toolkit]

Your web server process runs with a different environment than your normal interactive shell. When a browser requests a cgi script, the web server updates several environment variables to reflect the incoming HTTP request, such as:

$QUERY_STRING
$CONTENT_LENGTH
$REQUEST_METHOD
etc..

The cgi script is a child of this web server process, and hence inherits its environment. Hence for your code sample above, the variable [tt]$ENV{'REQUEST_METHOD'}[/tt] is most likely the cause of your warning message.
Cheers, Neil

 

[toolkit]

Some links:

http://directory.google.com/Top/Computers/Programming/Internet/CGI/Tutorials/

http://httpd.apache.org/docs-2.0/howto/cgi.html

Cheers, Neil

 

[jerehart]

Thanks Neil,

That is the answer because when I finally ran the scripts with perl -wc myscript.pl my syntax came out fine.

Thanks again
Miah