";
return false;
}
else{
return true;
}
}
function val_loc($var, $global_string){
global $global_string;
$temp_string = str_replace(" ","",$var);
$len = strlen($temp_string);
if($len < 2){
$global_string = $global_string."Location field must have at least two characters. Resubmit with valid location.
";
return false;
}
else{
return true;
}
}
function val_email($email_string, $global_string){
global $global_string;
$pattern = "^[a-zA-Z0-9]+@([a-zA-Z0-9]+.)+";
if(!ereg($pattern,$email_string)){
$global_string= $global_string."E-mail address not valid. Resubmit with valid e-mail address.
";
return false;
}
else{
return true;
}
}
function write_to_file($record){
#print "$record
";
#$filename = "../data/guestbook.txt";
#$file = fopen($filename,"a");
#fwrite($file,$record);
#fclose($file);
#$file = fopen($filename,'r');
#$data_echo = fgets($file);
#print "$data_echo";
#fclose($file);
if($file = fopen('../data/guestbook.txt','a')){
if(flock($file,LOCK_EX)){
if(!fwrite($file,$record)){
print"Unable to write to file.
";
return;
}
if(!flock($file,LOCK_UN)){
print"Unable to unlock the file.
";
}
}else{
print"Unable to lock the file.
";
if(!fclose($file)){
print"Unable to close file.
";
}
return;
}
if(!fclose($file)){
print"Unable to close file.
";
}
}else{
print"Unable to open file.
";
return;
}
print "Thank you for signing the Guestbook.
";
}
function display_Guestbook(){
print "Guestbook Entries:
";
#$path_string = substr($_SERVER['PATH_INFO']);
#$pathp = explode("/", $path_string);
#$filename = '../data/guestbook.txt';
if($file = fopen('../data/guestbook.txt','r')){
print "";
while($dataread = fgets($file)){
$row = explode("|",$dataread);
print "";
print "| ".$row[0]." | ";
print "".$row[1]." | ";
print "".$row[2]." | ";
print "
";
print "";
print "| ".$row[3]." | ";
print "
";
}
print "
";
if(!fclose($file)){
print"Unable to close file.
";
}
}else{
print"Unable to open file.
";
return;
}
}
if(array_key_exists('view',$_REQUEST)){
display_Guestbook();
print "Return to form
";
}
else
if((array_key_exists('username',$_REQUEST))and(array_key_exists('location',$_REQUEST))and(array_key_exists('E_mail_address',$_REQUEST))){
$uname = $_REQUEST['username'];
$temp_name = str_replace(" ","",$uname);
$local = $_REQUEST['location'];
$temp_local = str_replace(" ","",$local);
$email_val = $_REQUEST['E_mail_address'];
$user_comments = $_REQUEST['comments'];
$global_string = " ";
$valid_name = true;
$valid_location = true;
$valid_email = true;
$record = "";
$correction = false;
$name_location_pattern = '^[a-zA-Z]+$';
if(!(ereg($name_location_pattern,$temp_name))){
$global_string = $global_string."Name is not valid. Resubmit with valid name.
";
$correction = true;
}
if(!eregi($name_location_pattern,$temp_local)){
$global_string = $global_string."Location is not valid. Resubmit with valid location.
";
$correction = true;
}
$valid_name = val_name($uname,$global_string);
$valid_location = val_loc($local,$global_string);
$valid_email = val_email($email_val, $global_string);
if(($correction != false)||($valid_name != true)||($valid_location != true)||($valid_email!=true)){
print "$global_string";
print "";
}
else{
$uname = htmlentities($uname);
$uname = str_replace("|","",$uname);
$local = htmlentities($local);
$local = str_replace("|","",$local);
$email_val = htmlentities($email_val);
$email_val = str_replace("|","",$email_val);
$user_comments = htmlentities($user_comments);
$user_comments = str_replace("|","",$user_comments);
$user_comments = nl2br($user_comments);
$user_comments = str_replace("\n","",$user_comments);
$user_comments = str_replace("\r","",$user_comments);
$record = $uname."|".$local."|".$email_val."|".$user_comments."|
";
write_to_file($record);
print "";
}
}
else{
print "Please complete the data fields to register in the guestbook.
";
print "Name and Location are required, and each must be at least two characters in length. A valid e-mail Address is also required.
";
print<<<_END_HERE_
_END_HERE_;
}
?>
