Mangler hjælp til håbløs fejl

Jeg har fået en bekendt til at lave nedenstående (har ikke selv en pind forstand på php). Men den giver en fejlmelding i linie 185 - noget i stil med: Warning: Invalid argument supplied for foreach()
(jeg har markeret line 185 med en stribe Å'er)


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<TABLE cellSpacing=0 cellPadding=0 width="100%" border=0>
  <TBODY>
  <TR>
    <TD width=13><A href="../index.htm"><IMG
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<CENTER>
<TABLE cellSpacing=0 cellPadding=0 width=700 border=0><TR><TD>
<IMG SRC="katbe-g.gif" BORDER="0" WIDTH="204" HEIGHT="29" ALIGN="bottom" ALT=""><BR>
<span class="txt">


<?php
if (count($_POST) > 0) {
    trimdata($_POST); //remove whitespace
    extract($_POST,EXTR_OVERWRITE); //overwrite existing vars with the posted vars
}

if ($submit) {
    //form validation
    $error = array();
    if (!$name) {
        $error[] = "Angiv venligst dit navn";
    }
    if (!$address) {
        $error[] = "Angiv venligst din adresse";
    }
    if (!$zipcode) {
        $error[] = "Angiv venligst dit postnr.";
    }
    if (!$city) {
        $error[] = "Angiv venligst bynavn";
    }
    if (!$checkbox0 && !$checkbox1) {
        $error[] = "Du bedes vælge mindst én af checkboksene";
    }
    if (count($opt2) == 0) {
        $error[] = "Du bedes foretage mindst ét valg under Opt. 2";
    }

    //only send mail if there's no errors
    if (count($error) == 0) {
        //give user a message depending on checkbox choice
        if ($checkbox0 && !$checkbox1) {
            $text_msg = 'Denne tekst vises hvis den ene checkbox er valgt (Tekst 1)';
        } elseif ($checkbox1 && !$checkbox0) {
            $text_msg = 'Denne tekst vises hvis den anden checkbox er valgt (Tekst 2)';
        } elseif ($checkbox0 && $checkbox1) {
            $text_msg = 'Denne tekst vises hvis begge checkboxe er valgt (Tekst 3)';
        }
        $message = "Navn: ".$name."\n";
        $message  .= "Adresse: ".$address."\n";
        $message .= "Postnummer og by: ".$zipcode." ".$city."\n";
        $message .= "\n";
        $message .= "Opt 1.: ".$text_msg."\n";
        $message .= "Opt 2.:\n".join("\n",$opt2)."\n";

        echo $text_msg;
        mail('ntg@mail.dk', 'Tilmeldings mail', $message);
        ;?>
        <p><a href="videre.html">Klik her for at komme videre</a></p>
        <?php
    //if errors, give user some info...
    } else {
        echo join("<br>",$error);
    }
}

//show the form, if it is not sent, or errors ocurred
if (!$submit || count($error) > 0) {
    $opt2_ary = array();
    $opt2_ary[1] = 'Tekst 1';
    $opt2_ary[2] = 'Tekst 2';
    $opt2_ary[3] = 'Tekst 3';
    $opt2_ary[4] = 'Tekst 4';
    $opt2_ary[5] = 'Tekst 5';
    $opt2_ary[6] = 'Tekst 6';
    $opt2_ary[7] = 'Tekst 7';
    $opt2_ary[8] = 'Tekst 8';
    $opt2_ary[9] = 'Tekst 9';
    $opt2_ary[10] = 'Tekst 10';
    $opt2_ary[11] = 'Tekst 11';
    ?>
    <form action="index.php" method="post">





<TABLE WIDTH="100%" BORDER="0" CELLSPACING="0" CELLPADDING="0"><TR><TD valign="top">



<TABLE WIDTH="200" BORDER="0" CELLSPACING="0" CELLPADDING="0">
<TR><TD><span class="txt">
Navn
</TD><TD>
<input type="text" name="name" value="<?= $name?>">
</TD></TR>

<TR><TD><span class="txt">
Gade
</TD><TD>
<input type="text" name="address" value="<?= $address?>">
</TD></TR>


<TR><TD><span class="txt">
Postnr&nbsp;&nbsp;
</TD><TD>
<input type="text" name="zipcode" value="<?= $zipcode;?>">
</TD></TR>


<TR><TD><span class="txt">
By
</TD><TD>
<input type="text" name="city" value="<?= $city?>">
</TD></TR>


</TABLE>

<BR><BR>
<span class="txt">
Vi vil bede dig...






</TD><TD width="150" align=center valign=top><span class="txt">
<IMG SRC="so.jpg" BORDER="0" WIDTH="150" HEIGHT="216" ALIGN="bottom" ALT=""><BR>
so<BR>
<input type="checkbox" name="checkbox0" value="checkbox0" <?php if ($checkbox0) print "checked";?>
</TD><TD width="40">
&nbsp;&nbsp;
</TD><TD width="150" align=center valign=top><span class="txt">
<IMG SRC="vi.jpg" BORDER="0" WIDTH="150" HEIGHT="216" ALIGN="bottom" ALT=""><BR>
vi<BR>
<input type="checkbox" name="checkbox1" value="checkbox1" <?php if ($checkbox1) print "checked";?>
</TD></TR></TABLE>




<TABLE WIDTH="100%" BORDER="0" CELLSPACING="0"><TR>
<TD width=100%>





        <table border="0" cellpadding="0" cellspacing="0">
        <tr>
            <td>
                <table cellpadding="2" cellspacing="0" border="0">
                <?php
                foreach ($opt2_ary as $key => $value)
ÅÅÅÅÅÅÅÅÅÅÅÅÅÅÅÅÅÅÅÅÅÅÅÅÅÅÅÅÅÅ - herunder
{
                    if ($opt2[$key] == $value) $checked = "checked";
                    print "<tr><td>".$value."</td><td><input type=\"checkbox\" name=\"opt2[$key]\" value=\"".$value."\" ".$checked."></td></tr>";
                    unset($checked);
                }
                ?>
                </table>
                </td>
            </tr>
            <tr>
                <td colspan="2" align="right"><BR><BR>
        <input type="submit" name="submit" value="Send"></td>
            </tr>
        </table>
    </form>
   

<?php
//this function trims whitespace from all posted values
function trimdr( &$r ){
  if(gettype($r) == "array" ){
      foreach($r as $key => $value){
          trimdr($r[$key]);
      }
  }
  else{
    $r=trim( (string) $r );
  }
}

function trimdata( &$d ){
    trimdr($d);
}
?>






</TD></TR></TABLE>