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what is the problem in this script and why it makes error

Posted on 2009-07-02
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Last Modified: 2013-12-25
i have the attached script when I enter data and press the button it prints ok then display error message and I don't know why
I commented 2 lines because they made error
#use lib qw(/opt/lampp/bin/perl);
#use WebDB;
can you please tell me how to make the script work without comments
also this line I don't know what does it means
#@ MAIN_LOGIC
#@ INSERT_ITEM
#@ DISPLAY_ENTRY_FORM
please help as soon as possible
best regards
hatem gamal
#! /opt/lampp/bin/perl -w

#@ MAIN_LOGIC

# todo1.pl - initial version of to-do application
 

use strict;

#use lib qw(/opt/lampp/bin/perl);

use CGI qw(:standard);

#use WebDB;
 

print header (),

	start_html (-title => "To-Do List", -bgcolor => "white"),

	h2 ("To-Do List");
 

# Dispatch to proper action based on user selection
 

my $choice = lc (param ("choice"));	# get choice, lowercased
 

if ($choice eq "")					# initial script invocation

{

	display_entry_form ();

}

elsif ($choice eq "submit")

{

	insert_item (param ("content"));

	display_entry_form ();

}

else

{

	print p ("Logic error, unknown choice: $choice");

}
 

print end_html ();

#@ MAIN_LOGIC
 

exit (0);
 

# ----------------------------------------------------------------------
 

# Insert new to-do item if the content is non-empty.
 

#@ INSERT_ITEM

sub insert_item

{

my $content = shift;

my $dbh;
 

	$content =~ s/^\s+//;	# strip leading whitespace

	$content =~ s/\s+$//;	# strip trailing whitespace

	if ($content ne "")		# if content is non-empty, add to table

	{

		$dbh = WebDB::connect ();

		$dbh->do (qq{

			INSERT INTO todo SET t = NOW(), status = 'open', content = ?

				}, undef, $content);

		$dbh->disconnect ();

	}

}

#@ INSERT_ITEM
 

# Display entry form
 

#@ DISPLAY_ENTRY_FORM

sub display_entry_form

{

	print start_form (-action => url ()),

		"To-do item:", br (),

		textarea (-name => "content",

					-value => "",

					-override => 1,

					-rows => 3,

					-columns => 80),

		br (),

		submit (-name => "choice", -value => "Submit"),

		end_form ();

}

#@ DISPLAY_ENTRY_FORM

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Question by:hatem_from_mesr
  • 2
3 Comments
 
LVL 7

Assisted Solution

by:Fairlight2cx
Fairlight2cx earned 350 total points
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On the very first line, remove the space at position 3 after the #! sequence.
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LVL 48

Assisted Solution

by:Tintin
Tintin earned 150 total points
Comment Utility
It would have been very helpful if you had posted the actual errors.

Line 6 will not generate any errors by itself, but it is incorrect as it should be a directory and not a filename.

Line 8 will get an error if the WebDB module is not installed in any of the standard Perl paths or in the path defined in line 6 (which is obviously the incorrect path)
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LVL 7

Accepted Solution

by:
Fairlight2cx earned 350 total points
Comment Utility
By the way...

The #@ lines look to be someone's private convention for starting and stopping a block of code--notes to themselves, essentially.
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