Errore in "Risposta"

<? php
//CODE BY MATTEOIAMMA - WWW.MATTEOIAMMARRONE.COM
function bbcode($var){
$search = array(
/(.*?)/is,
/(.*?)/is,
/(.*?)/is,
//is,
/(.*?)/is,
/[url=(.*?)](.*?)[/url]/is,
//is,
/

/is,
//is,
/[marquee](.*?)[/marquee]/is,
);
$replace = array(

<strong>$1</strong>,
<em>$1</em>,
<u>$1</u>,
<img src=$1 />,

<a href=$1>$1</a>,
<a href=$1>$2</a>,
<div class=forum_quote>$1</div>,
<object classid=clsid:D27CDB6E-AE6D-11cf-96B8-444553540000 codebase=http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0>

<param name=movie value=$3 />
<param name=quality value=best />
<param name=play value=true />
<embed pluginspage=http://www.macromedia.com/go/getflashplayer src=$1 type=application/x-shockwave-flash quality=best play=true></embed>
</object>,
<div class=forum_code>$1</div>,
<marquee>$1</marquee>

);

$var = preg_replace ($search, $replace, $var);

//SISTEMABBCODE

//SISTEMA SMILE
$sel_smile = opendir(smiles);
while($smile=readdir($sel_smile)){
$smile_value = str_replace(.gif, , $smile);
$var_nw = str_replace($smile_value, <img src=smiles/$smile/>, $var);
}
// SYSTEMA SMILE
return $var_nw;
}
} ?>

function textarea($name, $value, $form){
?>
<center>
Basic:
<a Onclick=document.<?php echo $form; ?>.<?php echo $name; ?>.value+=>Grassetto</a>


<a Onclick=document.<?php echo $form; ?>.<?php echo $name; ?>.value+= >Sottolineato</a>

<a Onclick=document.<?php echo $form; ?>.<?php echo $name; ?>.value+= >Corsivo</a>


<p></p></center>
<?php
echo
<textarea name=$name rows=8 cols=40 id=$name>$value</textarea>;
?>
<p></p>

<a Onclick=document.<?php echo $form; ?>.<?php echo $name; ?>.value+=><b>IMMAGINE</b></a>
<a Onclick=document.<?php echo $form; ?>.<?php echo $name; ?>.value+=[url=quiurl]quitesto[/url]><b>URL</b></a>

<a Onclick=document.<?php echo $form; ?>.<?php echo $name; ?>.value+=

>Youtube Video</a>
<?php
echo <p></p>;
$smile_op = opendir(smiles);
while($smile=readdir($smileop)){ ?>
<a Onclick=document.<?php echo $form; ?>.<?php echo $name; ?>.value+=<img src="images/smiles/" alt="<?php echo $smile;?>">><img src=images/smiles/$smile/></a>

<?php
}
<p></p>
<div class=code>
<a Onclick=document.<?php echo $form; ?>.<?php echo $name; ?>.value+=


Codice di richiamo inserito nel Forum.inc.php


<h2></h2>
<font color="ffff"><div class="form_label"><h2>
Risposta rapida</h2>
</div>
<?php
include(bbcode.php);
include(bbcode2.php);
echo <form action= forum.inc.php method=messaggio name=form_field/>;
echo <input type=submit name=send value=Invia Form/>;
echo </form>;
if ($_POST['send']){
$contenuto_textarea=bbcode($_POST['messaggio']);
}
?>
<div class="form_field">
<textarea name="messaggio" /></textarea>
</div>


La linea di errore la segnala alla voci

echo <form action= forum.inc.php method=messaggio name=form_field/>;
echo <input type=submit name=send value=Invia Form/>;

quota