Simple template for adding a MailMan mailing list subscribe form to a page. Found on a mailing list somewhere a long time ago and cleaned up dramatically.

Note: I almost always just include the email and digest options, but I've included the whole spiel for completeness.

<h2>Join the XYZ listh2>

/mailman/subscribe/LISTNAME">

  

    Your E-mail address: "text" name="email" size="30" value="">

    Your Name (optional): "text" name="fullname" size="30" value="">

  

  
You may enter a privacy password below. This provides only mild security, but should

  prevent others from messing with your subscription. Do not use a valuable password as it

  will occasionally be emailed back to you in cleartext.

  
If you choose not to enter a password, one will be automatically generated for you, and it will

  be sent to you once you've confirmed your subscription. You can always request a mail-back

  of your password when you edit your personal options.

  

    Password choice: "password" name="pw" size="15">

    Confirm Password: "password" name="pw-conf" size="15">
  

  

    Would you like to receive list mail batched in a daily digest? (You may choose NoMail after you join.)

    "radio" name="digest" value="0" checked> No 
    "radio" name="digest" value="1"> Yes 

  
  
  
"submit" name="email-button" value="Subscribe">

Some really common layout classes I use in almost every CSS file.

/********* helpers *********/
.floatRight { float: right; }
.floatLeft  { float: left; }
.right  { text-align: right; }
.left   { text-align: left; }
.center { text-align: center; }
.clear, .clearer { clear: both; }
.block  { display: block; }

Close open HTML tags, e.g. if you allow HTML in your comments. Not quite as robust as running it through tidy, but tidy is not always available.

function close_dangling_tags($html){
  #put all opened tags into an array
  preg_match_all("#<([a-z]+)( .*)?(?!/)>#iU",$html,$result);
  $openedtags=$result[1];

  #put all closed tags into an array
  preg_match_all("##iU",$html,$result);
  $closedtags=$result[1];
  $len_opened = count($openedtags);
  # all tags are closed
  if(count($closedtags) == $len_opened){
    return $html;
  }

  $openedtags = array_reverse($openedtags);
  # close tags
  for($i=0;$i < $len_opened;$i++) {
    if (!in_array($openedtags[$i],$closedtags)){
      $html .= ''.$openedtags[$i].'>';
    } else {
      unset($closedtags[array_search($openedtags[$i],$closedtags)]);
    }
  }
  return $html;
}