Can someone help me with coding?

<?php
// webeditprofile.php - to accompany weblogin and websignup
// provides a form for webusers to edit their profile
// sottwell sept. 2006
// version 1.2 - bug fixes, improved password changing handler
// version 1.3 - oct. 2006 - added redirect if user is not logged in

$uid = $_SESSION['webInternalKey'];
$username = $_SESSION['webShortname'];

$result = $modx->db->select("*",$modx->getFullTableName('web_user_attributes'),"internalKey = ".$uid);
$userdata = $modx->db->getRow($result);

// load tpl
if(is_numeric($tpl)) { $tpl = ($doc=$modx->getDocuments($tpl)) ? $doc['content']:"Document '$tpl' not found."; }
else if($tpl) { $tpl = ($chunk=$modx->getChunk($tpl)) ? $chunk:"Chunk '$tpl' not found."; }
if(!$tpl) { $tpl = getWebProfiletpl(); }

// extract declarations
$declare = webLoginExtractDeclarations($tpl);
$tpls = explode((isset($declare["separator"]) ? $declare["separator"]:"<!--tpl_separator-->"),$tpl);

  $tpl = $tpls[0];
  $tpl = str_replace("[+action+]",$modx->makeURL($modx->documentIdentifier),$tpl);
  $tpl = str_replace("[+username+]",$_SESSION['webShortname'],$tpl);
  $tpl = str_replace("[+fullname+]",$userdata['fullname'],$tpl);
  $tpl = str_replace("[+email+]",$userdata['email'],$tpl);
  $tpl = str_replace("[+country+]",$userdata['country'],$tpl);
  $tpl = str_replace("[+state+]",$userdata['state'],$tpl);
  $tpl = str_replace("[+zip+]",$userdata['zip'],$tpl);
  $tpl.="<script type='text/javascript'>if (document.webprofilefrm) document.webprofilefrm.fullname.focus();</script>";

if(!$isPostBack) {
  // load template section #1
  $output = $tpl;
  return;
} else {
//echo "<pre>";
//print_r($_POST);
//echo "</pre>";
	// verify email
	if($_POST['email']=='' || !ereg("^[-!#$%&'*+./0-9=?A-Z^_`a-z{|}~]+", $_POST['email'])){
		$output = webLoginAlert("E-mail address doesn't seem to be valid!").$tpl;
		return;
	}
	if($_POST['email'] != $_SESSION['webEmail']) {
    // check for duplicate email address
    $sql = "SELECT internalKey FROM ".$modx->getFullTableName("web_user_attributes")." WHERE email='".$_POST['email']."'";
    if(!$rs = $modx->db->query($sql)){
      $output = webLoginAlert("An error occured while checking for duplicate email.").$tpl;
      return;
    } 
    $limit = $modx->db->getRecordCount($rs);
    if($limit>0) {
      $row=$modx->db->getRow($rs);
      if($row['internalKey']!=$uid) {
        $output = webLoginAlert("Email is already in use!").$tpl;
        return;
      }
    }
  }
	
	if(!empty($_POST['password'])) {
    // verify password
    if ($_POST['password']!=$_POST['confirmpassword']) {
      $output = webLoginAlert("Password typed is mismatched").$tpl;
      return;
    }
    // check password
    if (strlen($_POST['password']) < 6 ) {
      $output = webLoginAlert("Password must be at least 6 characters!").$tpl;
      return;
    }
    $password = $_POST['password'];
  }

  $fullname = $_POST['fullname'];
  $email = $_POST['email'];
  $country = $_POST['country'];
  $state = $_POST['state'];
  $zip = $_POST['zip'];
  
  $fields = array("fullname"=>$modx->db->escape($fullname),
                  "email"=>$modx->db->escape($email),
                  "country"=>$modx->db->escape($country),
                  "state"=>$modx->db->escape($state),
                  "zip"=>$modx->db->escape($zip)
            );
  if(!empty($_POST['password'])) {
    $rs2 = $modx->db->update("password = '".md5($password)."'",$modx->getFullTableName('web_users'),"id = ".$uid);
    if(!$rs2) {
      $output = webLoginAlert("Unable to update profile at this time!").$tpl;
      return;
    }
  }
  $rs1 = $modx->db->update($fields,$modx->getFullTableName('web_user_attributes'),"internalKey = ".$uid);
  if(!$rs1) {
      $output = webLoginAlert("Unable to update profile at this time!").$tpl;
      return;
  }
  if(!empty($_POST['password'])) {
    $output = $tpls[1];
    $rt = webLoginSendNewPassword($email,$username,$password,$fullname);
    if ($rt!==true) { // an error occured
      $output = webLoginAlert("Unable to send email!").$tpl;
      return;
    }
  } else {
    $output = $tpls[2];
  }        
  return;
}


function getWebProfiletpl(){
ob_start();
?>
<!-- #declare:separator <hr> --> 
<!-- login form section-->
<form method="post" name="webprofilefrm" action="[+action+]" style="margin: 0px; padding: 0px;">
<table border="0" cellpadding="2">
<caption>Edit Profile for [+username+]</caption>
<tr>
<td>
<table border="0" width="100%">
<tr>
<td>Full name:</td>
<td>
<input type="text" name="fullname" class="inputBox" style="width:300px" size="20" maxlength="100" value="[+fullname+]"></td>
</tr>
<tr>
<td>Email address:</td>
<td>
<input type="text" name="email" class="inputBox" style="width:300px" size="20" value="[+email+]"></td>
</tr>
<tr>
<td>New Password:</td>
<td>
<input type="password" name="password" class="inputBox" style="width:300px" size="20"></td>
</tr>
<tr>
<td>Confirm new password:</td>
<td>
<input type="password" name="confirmpassword" class="inputBox" style="width:300px" size="20"></td>
</tr>
<tr>
<td>Country:</td>
<td><select size="1" name="country" style="width:300px">
<option value="" selected> </option>
<option value="1">Afghanistan</option>
<option value="2">Albania</option>
<option value="3">Algeria</option>
<option value="4">American Samoa</option>
<option value="5">Andorra</option>
<option value="6">Angola</option>
<option value="7">Anguilla</option>
<option value="8">Antarctica</option>
<option value="9">Antigua and Barbuda</option>
<option value="10">Argentina</option>
<option value="11">Armenia</option>
<option value="12">Aruba</option>
<option value="13">Australia</option>
<option value="14">Austria</option>
<option value="15">Azerbaijan</option>
<option value="16">Bahamas</option>
<option value="17">Bahrain</option>
<option value="18">Bangladesh</option>
<option value="19">Barbados</option>
<option value="20">Belarus</option>
<option value="21">Belgium</option>
<option value="22">Belize</option>
<option value="23">Benin</option>
<option value="24">Bermuda</option>
<option value="25">Bhutan</option>
<option value="26">Bolivia</option>
<option value="27">Bosnia and Herzegowina</option>
<option value="28">Botswana</option>
<option value="29">Bouvet Island</option>
<option value="30">Brazil</option>
<option value="31">British Indian Ocean Territory</option>
<option value="32">Brunei Darussalam</option>
<option value="33">Bulgaria</option>
<option value="34">Burkina Faso</option>
<option value="35">Burundi</option>
<option value="36">Cambodia</option>
<option value="37">Cameroon</option>
<option value="38">Canada</option>
<option value="39">Cape Verde</option>
<option value="40">Cayman Islands</option>
<option value="41">Central African Republic</option>
<option value="42">Chad</option>
<option value="43">Chile</option>
<option value="44">China</option>
<option value="45">Christmas Island</option>
<option value="46">Cocos (Keeling) Islands</option>
<option value="47">Colombia</option>
<option value="48">Comoros</option>
<option value="49">Congo</option>
<option value="50">Cook Islands</option>
<option value="51">Costa Rica</option>
<option value="52">Cote D&#39;Ivoire</option>
<option value="53">Croatia</option>
<option value="54">Cuba</option>
<option value="55">Cyprus</option>
<option value="56">Czech Republic</option>
<option value="57">Denmark</option>
<option value="58">Djibouti</option>
<option value="59">Dominica</option>
<option value="60">Dominican Republic</option>
<option value="61">East Timor</option>
<option value="62">Ecuador</option>
<option value="63">Egypt</option>
<option value="64">El Salvador</option>
<option value="65">Equatorial Guinea</option>
<option value="66">Eritrea</option>
<option value="67">Estonia</option>
<option value="68">Ethiopia</option>
<option value="69">Falkland Islands (Malvinas)</option>
<option value="70">Faroe Islands</option>
<option value="71">Fiji</option>
<option value="72">Finland</option>
<option value="73">France</option>
<option value="74">France, Metropolitan</option>
<option value="75">French Guiana</option>
<option value="76">French Polynesia</option>
<option value="77">French Southern Territories</option>
<option value="78">Gabon</option>
<option value="79">Gambia</option>
<option value="80">Georgia</option>
<option value="81">Germany</option>
<option value="82">Ghana</option>
<option value="83">Gibraltar</option>
<option value="84">Greece</option>
<option value="85">Greenland</option>
<option value="86">Grenada</option>
<option value="87">Guadeloupe</option>
<option value="88">Guam</option>
<option value="89">Guatemala</option>
<option value="90">Guinea</option>
<option value="91">Guinea-bissau</option>
<option value="92">Guyana</option>
<option value="93">Haiti</option>
<option value="94">Heard and Mc Donald Islands</option>
<option value="95">Honduras</option>
<option value="96">Hong Kong</option>
<option value="97">Hungary</option>
<option value="98">Iceland</option>
<option value="99">India</option>
<option value="100">Indonesia</option>
<option value="101">Iran (Islamic Republic of)</option>
<option value="102">Iraq</option>
<option value="103">Ireland</option>
<option value="104">Israel</option>
<option value="105">Italy</option>
<option value="106">Jamaica</option>
<option value="107">Japan</option>
<option value="108">Jordan</option>
<option value="109">Kazakhstan</option>
<option value="110">Kenya</option>
<option value="111">Kiribati</option>
<option value="112">Korea, Democratic People&#39;s Republic of</option>
<option value="113">Korea, Republic of</option>
<option value="114">Kuwait</option>
<option value="115">Kyrgyzstan</option>
<option value="116">Lao People&#39;s Democratic Republic</option>
<option value="117">Latvia</option>
<option value="118">Lebanon</option>
<option value="119">Lesotho</option>
<option value="120">Liberia</option>
<option value="121">Libyan Arab Jamahiriya</option>
<option value="122">Liechtenstein</option>
<option value="123">Lithuania</option>
<option value="124">Luxembourg</option>
<option value="125">Macau</option>
<option value="126">Macedonia, The Former Yugoslav Republic of</option>
<option value="127">Madagascar</option>
<option value="128">Malawi</option>
<option value="129">Malaysia</option>
<option value="130">Maldives</option>
<option value="131">Mali</option>
<option value="132">Malta</option>
<option value="133">Marshall Islands</option>
<option value="134">Martinique</option>
<option value="135">Mauritania</option>
<option value="136">Mauritius</option>
<option value="137">Mayotte</option>
<option value="138">Mexico</option>
<option value="139">Micronesia, Federated States of</option>
<option value="140">Moldova, Republic of</option>
<option value="141">Monaco</option>
<option value="142">Mongolia</option>
<option value="143">Montserrat</option>
<option value="144">Morocco</option>
<option value="145">Mozambique</option>
<option value="146">Myanmar</option>
<option value="147">Namibia</option>
<option value="148">Nauru</option>
<option value="149">Nepal</option>
<option value="150">Netherlands</option>
<option value="151">Netherlands Antilles</option>
<option value="152">New Caledonia</option>
<option value="153">New Zealand</option>
<option value="154">Nicaragua</option>
<option value="155">Niger</option>
<option value="156">Nigeria</option>
<option value="157">Niue</option>
<option value="158">Norfolk Island</option>
<option value="159">Northern Mariana Islands</option>
<option value="160">Norway</option>
<option value="161">Oman</option>
<option value="162">Pakistan</option>
<option value="163">Palau</option>
<option value="164">Panama</option>
<option value="165">Papua New Guinea</option>
<option value="166">Paraguay</option>
<option value="167">Peru</option>
<option value="168">Philippines</option>
<option value="169">Pitcairn</option>
<option value="170">Poland</option>
<option value="171">Portugal</option>
<option value="172">Puerto Rico</option>
<option value="173">Qatar</option>
<option value="174">Reunion</option>
<option value="175">Romania</option>
<option value="176">Russian Federation</option>
<option value="177">Rwanda</option>
<option value="178">Saint Kitts and Nevis</option>
<option value="179">Saint Lucia</option>
<option value="180">Saint Vincent and the Grenadines</option>
<option value="181">Samoa</option>
<option value="182">San Marino</option>
<option value="183">Sao Tome and Principe</option>
<option value="184">Saudi Arabia</option>
<option value="185">Senegal</option>
<option value="186">Seychelles</option>
<option value="187">Sierra Leone</option>
<option value="188">Singapore</option>
<option value="189">Slovakia (Slovak Republic)</option>
<option value="190">Slovenia</option>
<option value="191">Solomon Islands</option>
<option value="192">Somalia</option>
<option value="193">South Africa</option>
<option value="194">South Georgia and the South Sandwich Islands</option>
<option value="195">Spain</option>
<option value="196">Sri Lanka</option>
<option value="197">St. Helena</option>
<option value="198">St. Pierre and Miquelon</option>
<option value="199">Sudan</option>
<option value="200">Suriname</option>
<option value="201">Svalbard and Jan Mayen Islands</option>
<option value="202">Swaziland</option>
<option value="203">Sweden</option>
<option value="204">Switzerland</option>
<option value="205">Syrian Arab Republic</option>
<option value="206">Taiwan</option>
<option value="207">Tajikistan</option>
<option value="208">Tanzania, United Republic of</option>
<option value="209">Thailand</option>
<option value="210">Togo</option>
<option value="211">Tokelau</option>
<option value="212">Tonga</option>
<option value="213">Trinidad and Tobago</option>
<option value="214">Tunisia</option>
<option value="215">Turkey</option>
<option value="216">Turkmenistan</option>
<option value="217">Turks and Caicos Islands</option>
<option value="218">Tuvalu</option>
<option value="219">Uganda</option>
<option value="220">Ukraine</option>
<option value="221">United Arab Emirates</option>
<option value="222">United Kingdom</option>
<option value="223">United States</option>
<option value="224">United States Minor Outlying Islands</option>
<option value="225">Uruguay</option>
<option value="226">Uzbekistan</option>
<option value="227">Vanuatu</option>
<option value="228">Vatican City State (Holy See)</option>
<option value="229">Venezuela</option>
<option value="230">Viet Nam</option>
<option value="231">Virgin Islands (British)</option>
<option value="232">Virgin Islands (U.S.)</option>
<option value="233">Wallis and Futuna Islands</option>
<option value="234">Western Sahara</option>
<option value="235">Yemen</option>
<option value="236">Yugoslavia</option>
<option value="237">Zaire</option>
<option value="238">Zambia</option>
<option value="239">Zimbabwe</option>
</select></td>
</tr>
<tr>
<td>State:</td>
<td>
<input type="text" name="state" class="inputBox" style="width:300px" size="20" maxlength="50" value="[+state+]"></td>
</tr>
<tr>
<td>Zip:</td>
<td>
<input type="text" name="zip" class="inputBox" style="width:300px" maxlength="50" size="20" value="[+zip+]"></td>
</tr>
</table>
</td>
</tr>
<tr>
<td align="right">
<input type="submit" value="Submit" name="cmdwebeditprofile" />
<input type="reset" value="Reset" name="cmdreset" />
</td>
</tr>
</table>
</form>
	<script language="javascript" type="text/javascript"> 
		var id = "[+country+]";
		var f = document.webprofilefrm;
		var i = parseInt(id);	
		if (!isNaN(i)) f.country.options[i].selected = true;
	</script>
<hr>
<!-- notification section -->
<span style="font-weight:bold;">Profile and Password changed</span><br />
Your account has been updated.<br />
A copy of your new signup information was sent to your email address.<br /><br />
<hr>
<span style="font-weight:bold;">Profile changed</span><br />
Your account has been updated.<br />
<?php
$frm = ob_get_contents();
ob_end_clean();
return $frm;
}
?>

# WebProfile 1.2
# Created By sottwell September 2006
# Version 1.3 - October 2006
# added redirect for non-loggin-in users
#::::::::::::::::::::::::::::::::::::::::
# Usage: 	
#	Allows a web user to edit the profile of his web account from the website
#	This snippet provides a basic set of form fields for the edit profile form
#	You can customize this snippet to create your own edit profile form
#
# Params:	
#
#	&tpl - (Optional) Chunk name or document id to use as a template
# &logout - (Optional) Document ID of page to redirect to if user is not logged in
#				  
#	Note: Template design:
#			section 1: profile template
#			section 2: notification template - with passwored change
#     section 3: notification template - no password change
#     by default use <hr> to separate sections 
#
# The page the snippet is called from must be uncached.
#
# Examples:
#
#	[[WebProfile? &tpl=`WebEditProfileForm` &logout=`23`]] 

# set page to redirect to if user is not logged in, site_start by default
if(!isset($_SESSION['webInternalKey']) || empty($_SESSION['webInternalKey'])) {
  $logout = isset($logout) ? $logout : $modx->config['site_start'];
  $modx->sendRedirect($modx->makeUrl($logout));
}

# Set Snippet Paths 
$snipPath = $modx->config['base_path'] . "assets/snippets/";

# check if inside manager
if ($m = $modx->insideManager()) {
	return ''; # don't go any further when inside manager
}


# Snippet customize settings
$tpl = isset($tpl)? $tpl:"";

# System settings
$isPostBack = count($_POST) && isset($_POST['cmdwebeditprofile']);

$output = '';

# Start processing
include_once $snipPath."weblogin/weblogin.common.inc.php";
include_once $snipPath."weblogin/webeditprofile.inc.php";

# Return
return $output;