'[select one]','rant'=>'rant','praise'=>'praise','question'=>'question','observation' =>'observation');
$defaults = array('subject'=>'','comments'=>'','name'=>'','email'=>'');
$TITLE = "Guestbook Demo";
include("simple_head.php");
function display_comments() {
$fp = @fopen(COMMENT_FILE,'r') ;
if (! $fp or !flock($fp,LOCK_SH)) return false;
while (!feof($fp)) {
echo nl2br(htmlentities(fgets($fp)));
}
flock($fp,LOCK_UN);
fclose($fp);
return true;
}
function save_comment($data) {
if (filesize(COMMENT_FILE) > 10240) {
$mode = 'w';
echo "(file getting too large, purging...sorry!)
";
} else {
$mode = 'a';
}
if (!$fp = @fopen(COMMENT_FILE,$mode)) return false;
if (! flock($fp,LOCK_EX)) return false;
$data['comments'] .= "\n[$data[subject] from $data[name] posted " . date('d-M-Y h:i a') . "]\n\n" ;
$result = @fputs($fp,strip_tags($data['comments']));
flock($fp,LOCK_UN);
fclose($fp);
return true;
}
function validate_form(&$data) {
$errors = array();
$data['email']=trim($data['email']);
$data['comments']=trim($data['comments']);
$data['name']=trim($data['name']);
if (empty($data['email'])) {
$errors[] = "Email address is required";
} elseif (! preg_match( '/^[^@\s]+@([-a-z0-9]+\.)+[a-z]{2,}$/i',$data['email'])) {
$errors[] = 'Email address appears to be invalid';
}
if (empty($data['comments'])) {
$errors[] = 'The comments field is required';
}
if (strlen($data['comments']) > 250 ) {
$errors[] = 'The comments field exceeds the maximum length';
}
$data['comments'] = strip_tags($data['comments']);
$data['name'] = strip_tags($data['name']);
if (! strlen($data['name'])) { $data['name'] = 'anonymous'; }
if (strlen($data['name']) > 36) {
// truncate it
$data['name'] = substr($data['name'],0,36);
$errors[] = 'Your name exceeds the max field length' ;
}
if (empty($data['subject'])) {
$errors[] = 'Subject field is required';
}
if (! array_key_exists($data['subject'],$GLOBALS['subject_options'])) {
$errors[] = 'Invalid subject field';
}
return $errors;
}
/* courtesy of "Learning PHP 5" by David Sklar */
function input_select($element_name, $selected, $options, $multiple = false) {
// print out the