PHP Forum

**mgraphic** · 08:57 PM

Create a simple guestbook as a plugin for any website.

Required Features:

1. It can use MySQL, DBM or TXT (including delimited, csv, xml, etc) files for data storage.

2. It should include pagination.

Optional Features:

• Protect spam entries with captcha verification.

• Blacklist for email and/or IP addresses.

• Anything creative you can come up with that would enhance the guestbook application.

**Physicsguy** · 08-04-2011, 05:16 PM

Nice challenge, Keith!

I've come up with this:

(That's right, its one file

)

HTML Code:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
<title>Text-Only Guestbook</title>
<meta http-equiv="content-type" content="text/html;charset=UTF-8" />
<meta name="author" content="Scott Kaye" />
<style type="text/css">body{font-family:Verdana;}input{min-height:18px;background:#fff;border-radius:10px;border:1px solid #000;color:#000;padding:5px;font-family:Verdana;box-shadow:inset 0 0 2px #555;font-size:80%;}[type="submit"]{float:right;}[type="submit"]:hover{background:#c9c9c9;}.pc{padding:5px 10px;background:#fef;border-bottom-left-radius:10px;border-bottom-right-radius:10px;}.ph{font-weight:700;background:#96A6FF;padding:5px 10px;border-top-left-radius:10px;border-top-right-radius:10px;}.pf{margin-bottom:10px;box-shadow:0px 3px 5px #888;border-radius:10px;}#con{color:#000;background:transparent;border:none;font-family:Verdana;font-size:80%;}#form{background:#fff;border-radius:10px;border:1px solid #000;padding:5px;box-shadow:inset 0 0 2px #555;display:table;}label{margin-right:10px;vertical-align:middle;font-weight:700;}</style>
</head>
<body>

<h1><a href="<?php echo basename(__FILE__);?>">Guestbook</a></h1>
<p>Post a visitor message!</p>
<form action="" method="post" id="form">
<textarea id="con" name="msg_content" rows="4" cols="80"></textarea><br />
<label>Your name:</label><input type="text" name="msg_author" size="55" />
<input type="submit" value="Submit" />
</form>
<hr />
<?php
//Settings//
$pag=3; //Pagination
$mf="togmsgs.txt"; //Message file
//End settings//
//Create the file, if it doesn't exist
if(!file_exists($mf)){$o=@fopen($mf,"a") or die("Folder not writable");fclose($o);}
//Get the file's contents as an array
$ms=file($mf);
//Check if the user is submitting a post or not
if(isset($_POST['msg_content'])){
	if($_POST['msg_content']!=null){
		$cf=array("badword","censorthis");
		$auth=$_POST['msg_author']!=null?$_POST['msg_author']:"Anonymous";
		$auth.=" on ".date("D jS M, Y, g:ia T",time());
		$auth=str_replace($cf,"***",str_replace("|","-",str_replace("\r\n","<br />",$auth)));
		$cont=str_replace($cf,"***",str_replace("|","-",str_replace("\r\n","<br />",$_POST['msg_content'])));
		$prev=file_get_contents($mf);
		$f=fopen($mf,"w");
		fwrite($f,$auth."|".$cont."\n".$prev);
		fclose($f);
		header("Location:".$_SERVER['HTTP_REFERER']);
	}
	else {echo "You didn't write anything!";}
}
//Set some variables first
if($_GET['p']<=0&&isset($_GET['p'])){header("Location:?p=1");}
$cp=isset($_GET['p'])?$_GET['p']:1;
//Loop through it and display each message.
for($i=$cp-1;$i<=($cp+$pag)-2;$i++){
	list($a,$c)=explode("|",$ms[$i]);
	if($a!=null&&$c!=null){echo "<div class=\"pf\"><div class=\"ph\">$a</div><div class=\"pc\">$c</div></div>";}
	$n=$i+2;
}
//Pagination
if($cp>1){$sp=1;}if($cp<count($ms)){$sn=1;}
if($sp==1){echo "<a href=\"?p=".($cp-$pag)."\">Previous Page</a>";}
if($sn==1){if($sp==1){echo "&nbsp;|&nbsp";}echo "<a href=\"?p=$n\">Next Page</a>";}
?>

</body>
</html>

It runs on a flat file, and filters out your choice of bad words. It has simple pagination, too.

Here's the uncommented version:

HTML Code:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head><title>Text-Only Guestbook</title>
<meta http-equiv="content-type" content="text/html;charset=UTF-8" />
<meta name="author" content="Scott Kaye" />
<style type="text/css">body{font-family:Verdana;}input{min-height:18px;background:#fff;border-radius:10px;border:1px solid #000;color:#000;padding:5px;font-family:Verdana;box-shadow:inset 0 0 2px #555;font-size:80%;}[type="submit"]{float:right;}[type="submit"]:hover{background:#c9c9c9;}.pc{padding:5px 10px;background:#fef;border-bottom-left-radius:10px;border-bottom-right-radius:10px;}.ph{font-weight:700;background:#96A6FF;padding:5px 10px;border-top-left-radius:10px;border-top-right-radius:10px;}.pf{margin-bottom:10px;box-shadow:0px 3px 5px #888;border-radius:10px;}#con{color:#000;background:transparent;border:none;font-family:Verdana;font-size:80%;}#form{background:#fff;border-radius:10px;border:1px solid #000;padding:5px;box-shadow:inset 0 0 2px #555;display:table;}label{margin-right:10px;vertical-align:middle;font-weight:700;}</style>
</head><body><h1><a href="<?php echo basename(__FILE__);?>">Guestbook</a></h1>
<p>Post a visitor message!</p>
<form action="" method="post" id="form">
<textarea id="con" name="msg_content" rows="4" cols="80"></textarea><br />
<label>Your name:</label><input type="text" name="msg_author" size="55" />
<input type="submit" value="Submit" />
</form>
<hr />
<?php
$pag=3;
$mf="togmsgs.txt";
if(!file_exists($mf)){$o=@fopen($mf,"a") or die("Folder not writable");fclose($o);}
$ms=file($mf);
if(isset($_POST['msg_content'])){
	if($_POST['msg_content']!=null){
		$cf=array("badword","censorthis");
		$auth=$_POST['msg_author']!=null?$_POST['msg_author']:"Anonymous";
		$auth.=" on ".date("D jS M, Y, g:ia T",time());
		$auth=str_replace($cf,"***",str_replace("|","-",str_replace("\r\n","<br />",$auth)));
		$cont=str_replace($cf,"***",str_replace("|","-",str_replace("\r\n","<br />",$_POST['msg_content'])));
		$prev=file_get_contents($mf);
		$f=fopen($mf,"w");
		fwrite($f,$auth."|".$cont."\n".$prev);
		fclose($f);
		header("Location:".$_SERVER['HTTP_REFERER']);
	}
	else {echo "You didn't write anything!";}
}
if($_GET['p']<=0&&isset($_GET['p'])){header("Location:?p=1");}
$cp=isset($_GET['p'])?$_GET['p']:1;
for($i=$cp-1;$i<=($cp+$pag)-2;$i++){
	list($a,$c)=explode("|",$ms[$i]);
	if($a!=null&&$c!=null){echo "<div class=\"pf\"><div class=\"ph\">$a</div><div class=\"pc\">$c</div></div>";}
	$n=$i+2;
}
if($cp>1){$sp=1;}if($cp<count($ms)){$sn=1;}
if($sp==1){echo "<a href=\"?p=".($cp-$pag)."\">Previous Page</a>";}
if($sn==1){if($sp==1){echo "&nbsp;|&nbsp";}echo "<a href=\"?p=$n\">Next Page</a>";}?></body></html>

Hope it's useful

**mgraphic** · 08-04-2011, 11:04 PM

You are not allowed to set headers after output from line 41

**Physicsguy** · 08-04-2011, 11:10 PM

Wow, nice call Keith! I forgot about that.

That's weird though. Normally PHP will get mad at you for doing that, and exit() out with a fatal error (headers already sent). I wonder why it didn't tell me, and why I didn't see that.

Thanks for pointing that out!