November 22, 2014
 
 
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Setting Up a MySQL Based Website - Part I - page 4

Introduction

  • October 1, 1999
  • By Andrew Chen

The following perl application will both display a form for user entries into the guestbook, to add new entries into the guestbook and then display the guestbook.

#!/usr/bin/perl -Tw

use strict;
$| = 1;

use CGI::Carp "fatalsToBrowser";
use CGI ":all";
use DBI;

my $serverName = "localhost";
my $serverPort = "3306";
my $serverUser = "guestbook";
my $serverPass = "guestbook";
my $serverDb = "guestbook";
my $serverTabl = "guestbook";

print
�����header,
�����start_html("SQL Guestbook"),
�����h1("Add and Read Guestbook Entries");
if(my $error = check_form()) {
�����show_form($error);
�����print end_html;
} else {
�����if(my $error = insert_entry()) {
����������show_form($error);
�����} else {
����������show_entries();
�����}
�����print end_html;
}

sub show_form {
�����my $error = shift;
�����print hr;
�����if($error) { print $error, hr; }
�����print
����������start_form,
�����table(map
����������Tr(td($_->[0]), td(textfield($_->[1],"",undef,60))),
����������["Name", "name"],
����������["Age", "age"],
����������["E-Mail Address", "email"],
����������["Web Site Address", "website"],
����������["Comments", "comments"],
����������),
�����submit,
�����end_form,
�����hr;
}

sub check_form() {
�����return "You didn't enter anything..." unless param();
�����return "Please enter a name" unless param("name");
�����return "Please enter your e-mail address" unless param("email");
�����return;
}

sub insert_entry {
�����my ($dbh, $success, $name, $age, $email, $website, $comments,$time);
�����
�����$dbh = DBI->connect("DBI:mysql:database=$server Db;host=$serverName;port=$serverPort",$serverUser,$serverPass);
�����$name = param("name");
�����$age = param("age");
�����$email = param("email");
�����$website = param("website");
�����$comments = param("comments");
�����$time = time;
�����$success = $dbh->do("INSERT INTO
���������������$serverTabl(name,age,email,website,comments,time)
���������������VALUES(?,?,?,?,?,?)", undef, $name, $age, $email, $website, $comments, $time);
�����$dbh->disconnect;
�����if($success != 1) {
����������return "Sorry, the database was unable to add your entry.
���������������Please try again later.";
�����} else {
����������return;
�����}
}

sub show_entries {
�����my ($dbh, $sth, @row);

�����$dbh = DBI->connect("DBI:mysql:database=$serverDb;host=$serverName;port=$serverPort",$serverUser,$serverPass);
�����$sth = $dbh->prepare("SELECT name,age,email,website,comments,time
���������������FROM $serverTabl ORDER BY time");
�����$sth->execute;
�����print "Existing Entries",hr;
�����while(@row = $sth->fetchrow_array) {
����������$row[5] = scalar(localtime($row[5]));
����������print "Name: ", $row[0], br;
����������print "Age: ", $row[1], br;
����������print "E-Mail Address: ", $row[2], br;
����������print "Web Site Address: ", $row[3], br;
����������print "Comments: ", $row[4], br;
����������print "Added on ", $row[5], hr;
�����}
�����$sth->finish;
�����$dbh->disconnect;
}

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