[PHP/MySQL] $15 Contest for the most complex code

[sathenzar]

Ok, so the rules are simple. Just post the most complex php/mysql code (within reason don't post some mysql string that takes up 500 pages) that takes up of a maximum of 2 pages of code (printed). It doesn't even have to be yours (as long as you have a right to post it). Just post it and explain what it does. The winner will be chosen by me and I'll paypal them $15. Contest ends Friday. Have fun! :)

btw: I'm doing this for a learning experience more than anything. I want to see really complex pieces of work so I can see where I'm at with my coding as far as queries go. Just to fill you in as you're probably wondering why on earth I decided to do this lol.

[C++]

 <?="Hello, world!"?>

[azz0r_wugg]

<?php

class Blog {

	public $id;
	public $userId;
	public $title;
	public $body;
	public $views;
	public $comments;
	public $voteCount;
	public $voteAverage;
	public $voteTotal;
	public $voteUserIds;
	public $created;
	public $updated;
	public $autoLoad;

	function __construct($id, $userId, $title, $body=NULL, $views=NULL, $comments=NULL, $voteCount=NULL, $voteAverage=NULL, $voteTotal=NULL, $voteUserIds=NULL, $created=NULL, $updated=NULL, $autoLoad=array()) {
		$this->id 			= $id;
		$this->userId		= $userId;
		$this->title 		= stripslashes($title);
		$this->body 		= stripslashes($body);
		$this->views		= $views;
		$this->comments		= $comments;
		$this->voteCount 	= $voteCount;
		$this->voteAverage	= $voteAverage;
		$this->voteTotal	= $voteTotal;
		$this->voteUserIds	= $voteUserIds;
		$this->created 		= $created;
		$this->updated		= $updated;
		$this->autoLoad		= $autoLoad;
		$this->AutoLoad($this->autoLoad);
	}


	public function AutoLoad($autoLoad) {

		if(is_array($autoLoad)) {
			foreach($autoLoad as $load):
				switch($load):
					case 'comments' :
						$this->LoadComments();
					break;
					case 'tags' :
						$this->LoadTags();
					break;
				endswitch;
			endforeach;
		} else if ($autoLoad === true) {
			$this->LoadComments();
			$this->LoadTags();
		}
	}


	public static function Load($id, $autoLoad=array()) {

		try {
			$db = Database::GetInstance();
			$result = $db->query("SELECT * FROM Blog WHERE id = ".$id);

				if($result && $result->num_rows > 0) {
					$q = $result->fetch_object();
						if($Object = new self($q->id, $q->user_id, $q->title, $q->body, $q->views, $q->comments, $q->vote_count, $q->vote_average, $q->vote_total, $q->vote_user_ids, $q->created, $q->updated, $autoLoad)) {
							return $Object;
						}
					} else {
						throw new ApplicationException('Could not load blogId '.$id);
					}

		} catch(DatabaseException $e) {
			throw new ApplicationException($e->getMessage(), $e->getCode());
		}
	}


	public function LoadComments() {
		$this->Comments = Comment_Blog::LoadByBlogId($this->id);
	}


	public function LoadTags() {
		$this->Tags = Tag_Blog::LoadTagsByBlogId($this->id);
	}



	public function AddView() {

		try {
			$db = Database::GetInstance();
			$result = $db->query("UPDATE Blog SET views = views + 1 WHERE id = ".$this->id);

				if(!$result) {
					return false;
				} else if ($db->affected_rows >= 0) {
					return true;
				} else {
					return false;

				}

		} catch(DatabaseException $e) {
			throw new ApplicationException($e->getMessage(), $e->getCode());
		}		
	}


	public function HasVoted($userId) {
		$items = explode(',', $this->voteUserIds);
		return in_array($userId, $items) ? true : false;
	}

	public function TagsToString() {

			if(!empty($this->Tags)):
				$result = NULL;
					foreach($this->Tags as $tag):
						$result .= ', '.$tag->title;
					endforeach;
				return substr($result, 2);
			endif;
		return false;
	}


	public function Vote($rating) {
	global $User;

		try {
			$db = Database::GetInstance();

			if($User->id == $this->userId) {//my blog, cant vote
				return false;
			} else if ($this->HasVoted($User->id) == true) {//already voted
				return false;
			}

			$this->voteUserIds = $this->voteUserIds.",".$User->id;

			if($this->voteCount > 1) {
				$this->voteTotal 	= $this->voteTotal + $rating;
				$this->voteCount 	= $this->voteCount + 1;
				$this->voteAverage 	=  $this->voteTotal / $this->voteCount + 1;
			} else {
				$this->voteAverage = $rating;
			}

			$result = $db->query("UPDATE Blog SET vote_count = vote_count + 1, vote_average = '".$this->voteAverage."', vote_user_ids = '".$this->voteUserIds."', vote_total = vote_total + $rating WHERE id = ".$this->id);

				if(!$result) {
					return false;
				} else if ($db->affected_rows >= 0) {
					return true;
				} else {
					return false;

				}

		} catch(DatabaseException $e) {
			throw new ApplicationException($e->getMessage(), $e->getCode());
		}		
	}


	public function AddComment($blogId) {

		try {
			$db = Database::GetInstance();
			$result = $db->query("UPDATE Blog SET comments = comments + 1 WHERE id = ".$blogId);

				if(!$result) {
					return false;
				} else if ($db->affected_rows >= 0) {
					return true;
				} else {
					return false;

				}

		} catch(DatabaseException $e) {
			throw new ApplicationException($e->getMessage(), $e->getCode());
		}		
	}


	public function RemoveComment($blogId) {

		try {
			$db = Database::GetInstance();
			$result = $db->query("UPDATE Blog SET comments = comments - 1 WHERE id = ".$blogId);

				if(!$result) {
					return false;
				} else if ($db->affected_rows >= 0) {
					return true;
				} else {
					return false;

				}

		} catch(DatabaseException $e) {
			throw new ApplicationException($e->getMessage(), $e->getCode());
		}		
	}


	public function Save() {

		try {
			$db = Database::GetInstance();
			$result = $db->query("UPDATE Blog SET title = ".$db->safe($this->title).", body = ".$db->safe($this->body).", updated = ".time()." WHERE id = ".$this->id);

				if(!$result) {
					return false;
				} else if ($db->affected_rows >= 0) {
					return true;
				} else {
					return false;
				}

		} catch(DatabaseException $e) {
			throw new ApplicationException($e->getMessage(), $e->getCode());
		}		
	}


	public static function LoadAllByType($from, $to, $type=NULL, $extra=NULL, $count=0, $autoLoad=array()) {
	global $User;

		try {
			$db = Database::GetInstance();

			if($type == 'by_user') {
				$arg = " AND b.user_id = $extra ";
				$join = NULL;
			} else if ($type == 'by_tag') {
				$arg = ' AND t.title = '.$db->safe($extra);
				$join = "LEFT JOIN Tag_Blog tb ON (tb.blog_id = b.id) LEFT JOIN Tag t ON (tb.tag_id = t.id) ";
			} else if ($type == 'by_friends') {
				$arg = " AND b.user_id IN($extra) ";
				$join = NULL;
			} else {
				$arg = NULL;
				$join = NULL;
			}

			$sql = "SELECT b.*, u.username as username, ud.id as ud_id, ud.key, ud.value 
			FROM Blog b 
			JOIN User u ON (b.user_id = u.id) 
			LEFT OUTER JOIN User_Data ud ON (u.id = ud.user_id AND ud.key = 'Avatar') 
			$join 
			WHERE b.id > 0 
			$arg 
			ORDER BY b.created DESC
			LIMIT $from, $to";
			$query = $db->query($sql) or die($db->error." $sql");

				if($count == 1) {
					return $query->num_rows;
				}

				if($query && $query->num_rows > 0):
					$blogs = array();
						while ($q = $query->fetch_object()):
							$Object = new self($q->id, $q->user_id, $q->title, $q->body, $q->views, $q->comments, $q->vote_count, $q->vote_average, $q->vote_total, $q->vote_user_ids, $q->created, $q->updated, $autoLoad);
							$Object->User = new User($q->user_id, $q->username);
							if(!empty($q->key)):
								$Object->User->Avatar = new User_Data($q->ud_id, $q->user_id, $q->key, $q->value);
							endif;
							$blogs[] = $Object;
						endwhile;
					return $blogs;
				endif;
			return false;

		} catch(DatabaseException $e) {
			throw new ApplicationException($e->getMessage(), $e->getCode());
		}		
	}


	public static function Create($userId, $title, $body) {

		try {
			$db = Database::GetInstance();
			$time = time();
			$db->query("INSERT INTO Blog (user_id, title, body, created, updated) VALUES ($userId, ".$db->safe($title).", ".$db->safe($body).", $time, $time) ");
			$id = $db->insert_id;

				if($db->affected_rows > 0) {
					return self::Load($id);
				} else { 
					return false;
				}

		} catch(DatabaseException $e) {
			throw new ApplicationException($e->getMessage(), $e->getCode());
		}		
	}


	public function Delete() {

		try {
			Comment_Blog::DeleteByBlogId($this->id);
			$db = Database::GetInstance();
			return $db->query("DELETE FROM Blog WHERE id = ".$this->id);

		} catch(DatabaseException $e) {
			throw new ApplicationException($e->getMessage(), $e->getCode());
		}		
	}


}

?>

[p858snake]

This wouldn't happen to be for some sort of school/uni/college project would it?

[Dance.]

Exactly two pages? Sounds suspicious.

[Mathachew Veteran]

  Sharad. said:

Exactly two pages? Sounds suspicious.

Indeed it is... :shiftyninja:

[azz0r_wugg]

Meh who cares, give me my $15! Poppa needs a nice bottle of wine

[duritz]

i dont get it.

[Stained]

PHP code obfuscator:

<?php
set_time_limit(0);

$web=isset($_POST['w']) ? 1 : 0;
$no_change=Array();
$no_change_funcs=Array();

if($web)
{
  $tmparr=isset($_POST['vrepl']) ? trim($_POST['vrepl']) : '';

  if($tmparr)
  {
	$tmparr=explode("\n",$tmparr);
	foreach($tmparr as $vname)
	{
	  $vname=str_replace("\r","",$vname);
	  if(!preg_match("/^\\$([a-zA-Z_\x7f-\xff]{1}[a-zA-Z0-9_\x7f-\xff]*)$/i",$vname))
		errpr("Error in non-replaceable variable list");

	  $no_change[]=$vname;
	}
  }



  $tmparr=isset($_POST['frepl']) ? trim($_POST['frepl']) : '';

  if($tmparr)
  {
	$tmparr=explode("\n",$tmparr);
	foreach($tmparr as $fname)
	{
	  $fname=str_replace("\r","",$fname);
	  if(!preg_match("/^([a-zA-Z0-9_]+)$/i",$fname))
		errpr("Error in non-replaceable function list");

	  $no_change_funcs[]=$fname;
	}
  }


  $tmparr=isset($_POST['ffrepl']) ? trim($_POST['ffrepl']) : '';

  if($tmparr)
  {
	$tmparr=explode("\n",$tmparr);
	foreach($tmparr as $fname)
	{
	  $fname=str_replace("\r","",$fname);
	  if(!preg_match("/^([a-zA-Z0-9_]+)$/i",$fname))
		errpr("Error in function list witn non-replaceable variables");

	  $no_str_repl[]=$fname;
	}
  }

  $sfuncname=isset($_POST['sfunc']) ? $_POST['sfunc'] : '';
  if($sfuncname)
  {
	if(!preg_match("/^([a-zA-Z0-9_]+)$/i",$sfuncname))
	  errpr("Wrong function name for crypt");
  }
}
else
{
print <<<HERE
<html><head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
<title>PHP Obfuscator by DX 1.0</title>
<style>
td
{
border-width:1px 1px 1px 1px;
border-style:solid;
border-color:black;
}
INPUT
{
BORDER-RIGHT: rgb(50,50,50) 1px outset;
BORDER-TOP: rgb(50,50,50) 1px outset;
FONT-SIZE: 11px;
font-family:Arial;
BORDER-LEFT: rgb(50,50,50) 1px outset;
BORDER-BOTTOM: rgb(50,50,50) 1px outset;
}
button
{
BORDER-RIGHT: rgb(50,50,50) 1px outset;
BORDER-TOP: rgb(50,50,50) 1px outset;
FONT-SIZE: 10px;
BORDER-LEFT: rgb(50,50,50) 1px outset;
BORDER-BOTTOM: rgb(50,50,50) 1px outset;
width:50px;
}
textarea
{
BORDER-RIGHT: rgb(50,50,50) 1px outset;
BORDER-TOP: rgb(50,50,50) 1px outset;
BORDER-LEFT: rgb(50,50,50) 1px outset;
BORDER-BOTTOM: rgb(50,50,50) 1px outset;
FONT-SIZE: 13px;
font-family:Arial;
}
select
{
FONT-SIZE: 10px;
background-color:#f4f4ff;
}
a,a:active,a:visited
{
background: transparent;
color: #34498B;
text-decoration: none;
font-weight:700;
font-size:10;
font-family:Arial;
background-color:wheat;
}
a:hover
{
background: transparent;
color: blue;
font-weight:700;
font-family:Arial;
font-size:10;
text-decoration: none;
background-color:yellow;
}
</style>
</head>
<body>
<form action="?" method="post">
<input type="hidden" name="w" value="1">
<table style="border-width:1px 1px 1px 1px; border-style:solid; border-collapse:collapse; border-color:black; width:100%; height:100%">
<tr><td colspan=2 align=center style="font-size:18;height:10">PHP Obfuscator by DX 1.0</td></tr>
<tr valign=top><td>Source code (With <? and ?>)<hr>
<textarea style="width:99%;font-family:Lucida Console;" rows=35 name="src"></textarea>
<br><br><center><input type="submit" value="Obfuscate!"></center>
<hr><b>Important!</b><br>Please, don't use \$\$var_name and eval.<br>
</td><td style="width:350;font-face:Arial;font-size:12;">Obfuscation options<hr>
Function name for obfuscation (optional): <input type="text" name="sfunc" value=""><hr>
<input type="checkbox" name="obvars" checked> Replace variables<br>
<input type="radio" value="0" name="vtype" checked> Give short names to variables<br>
<input type="radio" value="1" name="vtype"> Give long names to variables<br>
<hr>
<input type="checkbox" name="obstrs" checked> Static strings obfuscation<br>(speed will decrease)<br>
<input type="radio" value="0" name="stype"> Simple obfuscation<br>
<input type="radio" value="1" name="stype" checked> Encode in base64<br>
<hr>
<input type="checkbox" name="obfuncs" checked> Replace functions<br>
<input type="radio" value="0" name="ftype" checked> Functions short names<br>
<input type="radio" value="1" name="ftype"> Functions long names<br>
<hr>
<input type="checkbox" name="cmpr" checked>Maximum compression<hr>
Non-replaceable variables:<br>
<textarea style="width:340;font-family:Lucida Console;" rows=10 name="vrepl">\$_GET
\$_POST
\$_COOKIE
\$_SERVER
\$_FILE
\$HTTP_GET_VARS
\$HTTP_POST_VARS
\$HTTP_COOIE_VARS
\$GLOBALS
\$HTTP_SERVER_VARS
\$HTTP_POST_FILES
\$_REQUEST
\$_SESSION
\$HTTP_SESSION_VARS
\$_ENV
\$HTTP_ENV_VARS
\$php_errormsg
\$HTTP_RAW_POST_DATA
\$http_response_header
\$argc
\$argv
\$this</textarea>
<br>Non-replaceable functions:<br>
<textarea style="width:340;font-family:Lucida Console;" rows=10 name="frepl">__destruct
__construct
__get
__set
__call
__callStatic
__isset
__unset
__sleep
__wakeup
__toString
__set_state
__clone</textarea>
<br>Functions with non-replaceable parameters:<br>
<textarea style="width:340;font-family:Lucida Console;" rows=10 name="ffrepl">set_error_handler
ob_gzhandler
ibase_set_event_handler
session_set_save_handler
set_exception_handler
xml_set_character_data_handler
xml_set_default_handler
xml_set_element_handler
xml_set_end_namespace_decl_handler
xml_set_external_entity_ref_handler
xml_set_notation_decl_handler
xml_set_processing_instruction_handler
xml_set_start_namespace_decl_handler
xml_set_unparsed_entity_decl_handler
xslt_set_error_handler
readline_callback_handler_install
runkit_sandbox_output_handler
sybase_set_message_handler</textarea>
</td>
</tr></table></body></html>
HERE;
  exit();
}


$replace_vars=isset($_POST['obvars']) ? 1 : 0;
$obf_strings=isset($_POST['obstrs']) ? 1 : 0;
$obf_funcs=isset($_POST['obfuncs']) ? 1 : 0;
$compress_file=isset($_POST['cmpr']) ? 1 : 0;

$vars_mode=isset($_POST['vtype']) ? $_POST['vtype'] : 0;
if($vars_mode!=="1" && $vars_mode!=="0")
  $vars_mode=0;

$string_mode=isset($_POST['stype']) ? $_POST['stype'] : 0;
if($string_mode!=="1" && $string_mode!=="0")
  $string_mode=0;

$func_mode=isset($_POST['ftype']) ? $_POST['ftype'] : 0;
if($func_mode!=="1" && $func_mode!=="0")
  $func_mode=0;

$f=isset($_POST['src']) ? $_POST['src'] : '';

if(ini_get('magic_quotes_gpc')==1)
  $f=stripslashes($f);

if(!$f)
  errpr("Enter php-file code");

$obfuscated=get_obf_code($f,$replace_vars,$vars_mode,$obf_strings,$string_mode,$obf_funcs,$func_mode,$sfuncname);


if($compress_file) $obfuscated=compress_php_src($obfuscated);

$obfuscated=htmlspecialchars($obfuscated);

print <<<HERE
<html><head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
<title>PHP Obfuscator by DX 1.0</title>
</head>
<body>
<center><h3>Obfuskated code</h3></center><hr>
<textarea style="width:99%;font-family:Lucida Console;" rows=35>
$obfuscated
</textarea>
<br><a href="#" onclick="java script:history.go(-1)">Again</a>
</body></html>
HERE;
exit();



function errpr($txt)
{
print <<<HERE
<html><head>
<meta http-equiv="Content-Type" content="text/html;charset=utf-8">
<title>PHP Obfuscator by DX 1.0</title>
</head>
<body>
<h3>$txt</h3><hr>
<a href="#" onclick="java script:history.go(-1)">Back</a>
</body></html>
HERE;
exit();
}



function compress_php_src($src)
{
  static $IW=array();

  $tokens=@token_get_all($src);

  $new="";
  $c=sizeof($tokens);
  $iw=false;
  $ih=false;
  $ls="";
  $ot=null;
  for($i=0;$i<$c;$i++)
  {
	$token=$tokens[$i];
	  if(is_array($token))
	  {
		list($tn,$ts)=$token;
		$tname=token_name($tn);
		if($tn==T_INLINE_HTML)
		{
		  $new.=$ts;
		  $iw=false;
		}
		else
		{
		  if($tn==T_OPEN_TAG)
		  {
			if(strpos($ts," ") || strpos($ts,"\n") || strpos($ts,"\t") || strpos($ts,"\r"))
			{
			  $ts=rtrim($ts);
			}

			$ts.=" ";
			$new.=$ts;
			$ot=T_OPEN_TAG;
			$iw = true;
		  }
		  elseif($tn==T_OPEN_TAG_WITH_ECHO)
		  {
			$new.=$ts;
			$ot=T_OPEN_TAG_WITH_ECHO;
			$iw=true;
		  }
		  elseif($tn==T_CLOSE_TAG)
		  {
			if($ot==T_OPEN_TAG_WITH_ECHO)
			{
			  $new=rtrim($new,"; ");
			}
			else
			{
			  $ts=" ".$ts;
			}

			$new.=$ts;
			$ot=null;
			$iw=false;
		  }
		  elseif(in_array($tn,$IW))
		  {
			$new.=$ts;
			$iw=true;
		  }
		  elseif($tn==T_CONSTANT_ENCAPSED_STRING || $tn==T_ENCAPSED_AND_WHITESPACE)
		  {
			if($ts[0]=='"')
			{
			  $ts=addcslashes($ts,"\n\t\r");
			}

			$new.=$ts;
			$iw=true;
		  }
		  elseif($tn==T_WHITESPACE)
		  {
			$nt=@$tokens[$i+1];
			if(!$iw && (!is_string($nt) || $nt=='$') && !in_array($nt[0],$IW))
			{
			  $new.=" ";
			}

			$iw = false;
		  }
		  elseif($tn==T_START_HEREDOC)
		  {
			$new.="<<<S\n";
			$iw=false;
			$ih=true;
		  }
		  elseif($tn==T_END_HEREDOC)
		  {
			$new.="S;\n";
			$iw=true;
			$ih=false;

			for($j=$i+1;$j<$c;$j++)
			{
			  if(is_string($tokens[$j]) && $tokens[$j]==";")
			  {
				$i=$j;
				break;
			  }
			  else if($tokens[$j][0]==T_CLOSE_TAG)
			  {
				break;
			  }
			}
		  }
		  elseif($tn==T_COMMENT || $tn==T_DOC_COMMENT || $tn==T_ML_COMMENT)
		  {
			$iw = true;
		  }
		  else
		  {
			$new.=$ts;
			$iw = false;
		  }
		}

		$ls = "";
	  }
	  else
	  {
		if(($token!=";" && $token!=":") || $ls!=$token)
		{
		  $new.=$token;
		  $ls=$token;
		}

		$iw=true;

	  }
  }

  return $new;
}



function get_obf_code($src,$obfvars,$varmode,$obfstrings,$strmode,$obffuncs,$funcmode,$sfuncname='')
{
  global $no_change;
  global $allvars;
  global $no_change_funcs;
  global $no_str_repl;

  $tokens=@token_get_all($src);
  $c=sizeof($tokens);

  $allvars[0]=Array();
  $allvars[1]=Array();
  $currvar=0;

  $allfuncs[0]=Array();
  $allfuncs[1]=Array();
  $currfunc=0;

  $lastconstr='';

  $classsk=0;

  $prev=0;

  $currstr=0;

  $ot=0;

  $newcode="";
  $bfr='';
  $addcode1="";
  $sfname=$sfuncname ? $sfuncname : '_'.mt_rand();


  $isstr=0;
  $ineval=0;
  $isfunc=0;

  for($i=0;$i<$c;$i++)
  {
	$token=$tokens[$i];

	if(is_array($token))
	{
	  list($tn,$ts)=$token;

	  if(($tn==T_OPEN_TAG || $tn==T_OPEN_TAG_WITH_ECHO) && !$ot)
		$ot=1;

	  if($tn==T_CLOSE_TAG && $ot)
		$ot=0;


	  if($ot)
	  {
		if($tn==T_VAR || $tn==T_PROTECTED || $tn==T_PUBLIC || $tn==T_PRIVATE || $tn==T_CONST)
		  $classsk=1;

		if($tn==T_EVAL)
		  $ineval=1;


		if($isstr==1 && $tn==T_END_HEREDOC)
		  $isstr=0;


		if($tn==T_START_HEREDOC)
		  $isstr=1;


		if($ineval) {$newcode.=$ts;continue;}


		if($obfvars && $tn==T_VARIABLE && !in_array($ts,$no_change))
		{
		  if(!in_array($ts,$allvars[0]))
		  {
			$tmp=$ts;
			$allvars[0][$tmp]=$ts;
			$ts=$varmode==0 ? '$_'.$currvar : '$_'.md5($ts);
			$allvars[1][$tmp]=$ts;
			$currvar++;
		  }
		  else
		  {
			$ts=$allvars[1][$ts];
		  }
		}


		if($tn==T_STRING && $prev==T_OBJECT_OPERATOR)
		{
		  $ttt=$i+1;
		  $wbfunc=0;
		  while(isset($tokens[$ttt]))
		  {
			$nxt=$tokens[$ttt];

			if($nxt=='(' && !$isstr)
			{
			  $wbfunc=1;
			  break;
			}

			if(($nxt==';' || $nxt=='=' || $nxt==')'  || is_array($nxt)) && !$isstr)
			{
			  break;
			}
			$ttt++;
		  }
		}


		if($obfvars && !$wbfunc && $tn==T_STRING && $prev==T_OBJECT_OPERATOR && !in_array('$'.$ts,$no_change))
		{
		  if(!in_array('$'.$ts,$allvars[0]))
		  {
			$tmp='$'.$ts;
			$allvars[0][$tmp]='$'.$ts;
			$ts=$varmode==0 ? '_'.$currvar : '_'.md5('$'.$ts);
			$allvars[1][$tmp]='$'.$ts;
			$currvar++;
		  }
		  else
		  {
			$ts=substr($allvars[1]['$'.$ts],1);
		  }
		}


		if($tn==T_FUNCTION)
		  $isfunc=1;

		$prev= $tn==T_WHITESPACE ? $prev : $tn;


		if($obffuncs && $isfunc && !$fname && $tn==T_STRING && strtolower($ts)!='true' && strtolower($ts)!='false' && !in_array($ts,$no_change_funcs))
		{
		  if(!in_array($ts,$allfuncs[0]))
		  {
			$tmp=$ts;
			$allfuncs[0][$tmp]=$ts;
			$ts=$funcmode==0 ? '__'.$currfunc : '__'.md5($ts);
			$allfuncs[1][$tmp]=$ts;
			$currfunc++;
		  }
		  else
		  {
			$ts=$allfuncs[1][$ts];
		  }
		}


		if($classsk==0 && $obfstrings && !in_array($lastconstr,$no_str_repl) && $tn==T_CONSTANT_ENCAPSED_STRING && !$isfunc)
		{
		  if($strmode==0)
		  {
			$addcode1.=$ts.',';
			$ts=$sfname.'('.$currstr.')';
			$currstr++;
		  }
		  else
		  {
			eval('$tmp='.$ts.';');
			$addcode1.="'".base64_encode($tmp)."',";
			$ts=$sfname.'('.$currstr.')';
			$currstr++;
		  }
		}
	  }

	  if($tn==T_STRING)
		$lastconstr=$ts;


	  if($tn==T_END_HEREDOC)
		$ts.="\n";

	  $newcode.=$ts;
	  $bfr=$tn;
	}
	else
	{
	  $newcode.=$token;

	  if($isfunc && $ot)
	  {
		if($token==')')
		  $isfunc=0;
	  }

	  if($ot)
	  {
		if($isstr==2 && $token=="'")
		{
		  $isstr=0;
		  continue;
		}

		if($token=="'")
		  $isstr=2;

		if($isstr==3 && $token=='"')
		{
		  $isstr=0;
		  continue;
		}

		if($token=='"')
		  $isstr=3;

		if($classsk==1)
		{
		  if($token==';')
			$classsk=0;
		}

		if($ineval && $token==';')
		  $ineval=0;

		if($lastconstr && $token==';')
		  $lastconstr='';
	  }

	}
  }



  if($obfstrings)
  {
	$addcode1=substr($addcode1,0,strlen($addcode1)-1);

	if($strmode==0)
	  $addcode1="<? function $sfname(\$i)".'{'."\$a=Array($addcode1);return \$a[\$i];".'}'." ?>";
	else
	  $addcode1="<? function $sfname(\$i)".'{'."\$a=Array($addcode1);return base64_decode(\$a[\$i]);".'}'." ?>";
  }


  $newcode.=$addcode1;

  $tokens=token_get_all($newcode);
  $c=sizeof($tokens);
  $newcode="";

  $isstr=0;

  for($i=0;$i<$c;$i++)
  {
	$token=$tokens[$i];

	if(is_array($token))
	{
	  list($tn,$ts)=$token;

	  if(($tn==T_OPEN_TAG || $tn==T_OPEN_TAG_WITH_ECHO) && !$ot)
		$ot=1;

	  if($tn==T_CLOSE_TAG && $ot)
		$ot=0;

	  if($ot)
	  {
		if($isstr==1 && $tn==T_END_HEREDOC)
		  $isstr=0;

		if($tn==T_START_HEREDOC)
		  $isstr=1;


		if($obffuncs && $isstr==0 && $tn==T_STRING)
		{
		  if(isset($allfuncs[0][$ts]))
		  {
			$ts=$allfuncs[1][$ts];
		  }
		}
	  }

	  if($tn==T_END_HEREDOC)
		$ts.="\n";

	  $newcode.=$ts;
	}
	else
	{
	  $newcode.=$token;

	  if($ot)
	  {
		if($isstr==2 && $token=="'")
		{
		  $isstr=0;
		  continue;
		}

		if($token=="'")
		  $isstr=2;

		if($isstr==3 && $token=='"')
		{
		  $isstr=0;
		  continue;
		}

		if($token=='"')
		  $isstr=3;
	  }
	}
  }

  return $newcode;
}

print "Done!";
?>

[sathenzar]

no it has to be less is what I said. No it's not for a college project. Thanks for the input so far. Keep posting please. Make sure it has plenty of mysql code in it.

nice azz0r_wugg. I'm reading through that right now lol.

[DoctorHair]

I don't really care as to whether or not this is suspicious or anything, but I can verify that Sathenzar isn't even a student, leaving no class for which he could secretly employ this data.

[Mathachew Veteran]

What I don't get is why you want it to be the most complex example when it doesn't have to be complex at all.

[sathenzar]

I just am curious to find what others are doing in my field I hope to one day succeed in. So I want to see where I stand compared to what others do if that makes any sense. I figured adding money into it would create better results.

[Mathachew Veteran]

Well in the case of using PHP with MySQL, there's no reason the whole process has to be complex at all. A set of db container functions or even a db class that are unique to different types of databases could be created that make connecting, executing queries, and fetching data simple. One thing I loved about what I had pieced together was that the following line would connect if needed, execute a query, and fetch the results:

$users = dbFetchAll('SELECT * FROM users ORDER BY username;');

I mention this because, again, it doesn't have to be complex, nor should it be.

[sathenzar]

hm...true but could you post the function dbFetchAll? If not it's all good. It sounds interesting. So did you just return the results in an array then? Or did you just return it in a string and use explode?

[Shadrack]

Most complicated code is not always the best code. In fact, the most cleverly written code is not always the best either if no one can be clever enough to figure it out. The best code is simple, straight to the point, and easy to understand.

This contest = fail.

[Mathachew Veteran]

Sure. It's a cleaned up version of the original and there are things I would change (such as the function names). It also uses mysql_pconnect for persistent connections. Included is even a method to automatically backup the database and prompt a download.

<?php
global $DB_HOST, $DB_DB, $DB_USER, $DB_PASS, $DB_PORT;
$DB_HOST	= 'localhost';
$DB_DB		= 'database';
$DB_USER	= 'username';
$DB_PASS	= 'password';
$DB_PORT	= 3306;

function db_connect()
{
	global $DB_HOST, $DB_DB, $DB_USER, $DB_PASS;

	if(!function_exists('mysql_pconnect'))
		die('MySQL, a critical component for this site, is not accessible through PHP. Contact your system administrator or web host for more details.');

	$_SESSION['db'] = @mysql_pconnect($DB_HOST, $DB_USER, $DB_PASS);

	if(!$_SESSION['db'])
		die('Unable to establish a connection to the database. Contact your system administrator.');

	@mysql_select_db($DB_DB, $_SESSION['db']);
}

function db_backup()
{
	$filename = $_SERVER['HTTP_HOST'] . '_' . date('YmdHi') . '.sql.gz';
	$file = '/tmp/'.$filename;

	passthru("mysqldump --user=$DB_USER --password=$DB_PASS --host=$DB_HOST $DB_DB | gzip > $file");

	$file_part = explode('/', $file);

	header('Content-Description: File Transfer');
	header('Content-Type: application/octet-stream');
	header('Content-Length: ' . (string)(filesize($file)));
	header('Content-Disposition: attachment; filename=' . $file_part[(count($file_part) - 1)]);

	readfile($file);
}

function db_escape($var)
{
	return @mysql_escape_string($var);
}

function db_write($q)
{
	$rs = db_query($q);
	return $rs ? 1 : 0;
}

function db_query($q)
{
	if(!isset($_SESSION['db']) || !$_SESSION['db'])
		db_connect();

	if(!@is_resource($_SESSION['db']))
		db_error('Not connected to a database. Cannot execute query.');

	if(isset($_SESSION['queries']))
		$_SESSION['queries'][] = $q;

	if(!$return = @mysql_query($q, $_SESSION['db']))
		db_error('Could not execute the following query<br />' . "\n" . '<pre id="query">' . $q . '</pre>' . mysql_error($_SESSION['db']));

	return $return;
}

function db_fetch_all($q, $fetch = DB_ASSOC)
{
	$rs = db_query($q);

	switch($fetch)
	{
		case DB_ROW:
			$function = 'mysql_fetch_row';
			break;
		case DB_ARRAY:
			$function = 'mysql_fetch_array';
			break;
		case DB_ASSOC:
		default:
			$function = 'mysql_fetch_assoc';
			break;
	}

	$return = array();

	while($row = @$function($rs))
		$return[] = $row;

	return $return;
}

function db_fetch_one($q)
{
	$rs = db_query($q);
	$row = @mysql_fetch_assoc($rs);

	return count($row) ? $row : 0;
}

function db_count($q)
{
	$rs = db_query($q);
	$row = @mysql_fetch_row($rs);

	return count($row) ? $row[0] : 0;
}

function db_error($err)
{
	// included a file that would read $err inside of the site's content
	exit;
}
?>

[sathenzar]

I don't know why I didn't take that into account when I thought of this. So yeah that was a failure on my part. But oh well, already stated it so I have to follow it :)

I like that piece of code you posted Mathachew. It's interesting.

[Lynxx Lancer]

Hi, I would like to post some of my codes.. This codes are from my site ^^

  Quote

function blogwrite($title, $author, $date, $content, $postnumber) {

echo "<center><div align=\"left\" style=\"width: 540\"><a href=\"index.php?p=comment&post=".$postnumber."\" class=\"title\" ><b class=\"title\">".$title."</b></center></a>";

echo "<div class='stamp'>Post: ".$postnumber;

echo " - ".$date;

echo " - Written by: ".$author."</div>";

echo "<br >       <p ><font color=\"white\">".$content."</font></p></div></center><br >";

echo "<div align='right'><a class='B' href=\"index.php?p=comment&post=".$postnumber."\" ><b>Comments(";

$sqldata = mysql_query("SELECT * FROM comment WHERE page=$postnumber") or die("Can't Retrieve Data");

$rows = mysql_num_rows($sqldata);

echo $rows.")</b></a></div></div>";

echo '<br ><center><div style="border-top: 2px double white;width: 500;"></div></center><br >';

}

The above code is a function.. It is the one that writes on the blog.. How it is order, where title will be positioned, and such...

  Quote

$sqldata = mysql_query("SELECT * FROM blogtable") or die("Can't Retrieve Data");

$rows = mysql_num_rows($sqldata);

$a = $rows;

if (isset($_GET['pages'])) {

$a = $a - (($_GET['pages'] - 1) * 10);

if ($a < 10) {

$b = 0;

} else {

$b = $a - 10;

}

while ($a != $b) {

$sqldata = mysql_query("SELECT * FROM blogtable WHERE postnumber=$a");

$data = mysql_fetch_array($sqldata);

blogwrite($data['title'], $data['author'], $data['date'], $data['content'], $data['postnumber']);

$a--;

}

} elseif ($a > 10) {

$b = $a - 10;

while ($a != $b) {

$sqldata = mysql_query("SELECT * FROM blogtable WHERE postnumber=$a");

$data = mysql_fetch_array($sqldata);

blogwrite($data['title'], $data['author'], $data['date'], $data['content'], $data['postnumber']);

$a--;

}

}

else {

while ($a != 0) {

$sqldata = mysql_query("SELECT * FROM blogtable WHERE postnumber=$a");

$data = mysql_fetch_array($sqldata);

blogwrite($data['title'], $data['author'], $data['date'], $data['content'], $data['postnumber']);

$a--;

}

}

$c = $rows;

$d = 0;

echo "<br ><b><font size=\"1\"><div><center>|</b>";

while ($c != 0) {

$d++;

if ($d == 1 and !isset($_GET['pages'])) {

echo "<b>".$d."| </b>";

} elseif ($d == $_GET['pages']) {

echo "<b>".$d."| </b>";

} else {

echo "<b><a href=\"index.php?pages=".$d."\" >".$d."</a> | </b>";

}

if ($c < 10) {

$c = 0;

} else {

$c = $c - 10;

}

}

The code above organizes the blog entries from pages to pages ^^

See the result of this code in my site http://media6.site88.net

[sathenzar]

nice :) Thanks for the post.

[sachleen]

This is a part of my Kubix cms.. its over 2 years old, havn't worked on it lately.

<?PHP
////////////////////////////////////////////////////////
//		KUBIX CMS		//						 //
//	  Copyright (C)	  // KUBIX IS FREE SOFTWARE! //
//	  KUBIX PROJECT	  //	 DONT PAY FOR IT	 //
//   ALL RIGHTS RESERVED   //						 //
////////////////////////////////////////////////////////

// Include core files
include "Core/connect.php";
include "Core/functions.php";

// Connect
connect($server, $user, $password, $database);

// Get the options from the kbx_options table
$GetOpts = mysql_query("SELECT * FROM kbx_options");
$SiteName = mysql_result($GetOpts, 0, "SiteName");
$SiteURL = mysql_result($GetOpts, 0, "SiteURL");
$DefaultCat = mysql_result($GetOpts, 0, "DefaultCat");
$DefaultTheme = mysql_result($GetOpts, 0, "DefaultTheme");
$Announcement = mysql_result($GetOpts, 0, "Announcement");
$GuestMSG = mysql_result($GetOpts, 0, "GuestMSG");
$AdSection1 = mysql_result($GetOpts, 0, "AdSection1");
$AdSection2 = mysql_result($GetOpts, 0, "AdSection2");
$AdSection3 = mysql_result($GetOpts, 0, "AdSection3");
$AdSection4 = mysql_result($GetOpts, 0, "AdSection4");

// Get the links from the databse
$GetLinks = mysql_query("SELECT * FROM kbx_links");
$num = mysql_num_rows($GetLinks);

$Links = "";

for($i = 0; $i < $num; $i++)
{
	$LinkTitle = mysql_result($GetLinks, $i, "Title");
	$LinkURL = mysql_result($GetLinks, $i, "URL");

	$Links .= '<a href="' . $LinkURL . '">' . $LinkTitle . '</a><br />';
}

// Get the categories from the database
$GetCats = mysql_query("SELECT * FROM kbx_cats WHERE Type = 'news'");
$num = mysql_num_rows($GetCats);

$Cats = "";

for($i = 0; $i < $num; $i++)
{
	$CatID = mysql_result($GetCats, $i, "ID");
	$CatName = mysql_result($GetCats, $i, "Name");

	$Cats .= '<a href="index.php?cat=' . $CatID . '">' . $CatName . '</a><br />';
}

// Get the menu from the databse
$GetMenu = mysql_query("SELECT * FROM kbx_menu");
$num = mysql_num_rows($GetMenu);

$Menu = "";

for($i = 0; $i < $num; $i++)
{
	$MenuTitle = mysql_result($GetMenu, $i, "Title");
	$MenuLinks = mysql_result($GetMenu, $i, "Links");

	$MenuLinks = str_replace('{MENULINKS}', $Links, $MenuLinks);
	$MenuLinks = str_replace('{MENUCATS}', $Cats, $MenuLinks);

	$Menu .= '<div class="menutitle">' . $MenuTitle . '</div>';
	$Menu .= '<div class="menu">' . $MenuLinks . '</div>';
}

// Handel Logout
if(isset($_GET['act']) && $_GET['act'] == "Logout")
	header("Location:Core/LoginAuth.php?act=Logout");

// Get user information
if(isLoggedIn())
{
	$uID = $_COOKIE['member_id'];	
	$GetUserInfo = mysql_query("SELECT * FROM kbx_members WHERE id = $uID");
	$uName = mysql_result($GetUserInfo, 0, 'Name');
	$uEmail = mysql_result($GetUserInfo, 0, 'Email');
	$uMSN = mysql_result($GetUserInfo, 0, 'MSN');
	$uYahoo = mysql_result($GetUserInfo, 0, 'Yahoo');
	$uAIM = mysql_result($GetUserInfo, 0, 'AIM');
	$uOtherIM = mysql_result($GetUserInfo, 0, 'OtherIM');
	$uJoined = mysql_result($GetUserInfo, 0, 'Joined');
	$uHomePage = mysql_result($GetUserInfo, 0, 'HomePage');
	$uLevel = mysql_result($GetUserInfo, 0, 'Level');

	if($uHomePage != 0 || $uHomePage != NULL)
		$DefaultCat = $uHomePage;

	// Prepare user level
	$getlev = mysql_query("SELECT * FROM kbx_levels WHERE ID = $uLevel");

	$userLevel = mysql_result($getlev, 0, "Title");
	$uViewSite = mysql_result($getlev, 0, "ViewSite");
	$uComment = mysql_result($getlev, 0, "Comment");
	$uAddNews = mysql_result($getlev, 0, "AddNews");
	$uEditNews = mysql_result($getlev, 0, "EditNews");
	$uEditOwnProfile = mysql_result($getlev, 0, "EditOwnProfile");
	$uEditOtherProfile = mysql_result($getlev, 0, "EditOtherProfile");
}

// Prepare guest message
if(!isLoggedIn())
{
	if($GuestMSG != "")
	{
		$WelcomeGuest = '<div id="GuestMSG">' . $GuestMSG . '</div>' . "\n";
	}
	else
		$WelcomeGuest = '';
}
else
	$WelcomeGuest = '';

// Prepare announcement
if($Announcement != "")
{
	if(isAdm())
		$AnnouncementAdm = '<div class="fright">[<a href="admin.php?mod=opts">Edit</a>]</div>';
	else
		$AnnouncementAdm = '';

	$Announcement = '<div class="alert">' . $AnnouncementAdm . $Announcement . '</div>' . "\n";
}
else
	$Announcement = '';

// Prepare userbar
if(isLoggedIn())
{
	if(isMod())
		$UserBarLinks = '<a href="cp/">Control Panel</a> · ';
	else
		$UserBarLinks = '';

	$UserBar = '<div class="fright">' . $UserBarLinks . '<a href="index.php?act=Logout">Logout</a></div>Welcome: <a href="profile.php">' . $uName . '</a>';
}
else
	$UserBar = 'Welcome: Guest (<a href="login.php">Login</a> | <a href="register.php">Register</a>)';

include "Themes/$DefaultTheme/header.php";
?>

[Kudos Veteran]

  Mathachew said:

It also uses mysql_pconnect for persistent connections.

Why? Is your MySQL server at a different datacenter?

[Mathachew Veteran]

  Kudos said:

Why? Is your MySQL server at a different datacenter?

I know that my sites and databases are housed on different servers.

[tainted]

  Mathachew said:

Well in the case of using PHP with MySQL, there's no reason the whole process has to be complex at all. A set of db container functions or even a db class that are unique to different types of databases could be created that make connecting, executing queries, and fetching data simple. One thing I loved about what I had pieced together was that the following line would connect if needed, execute a query, and fetch the results:

$users = dbFetchAll('SELECT * FROM users ORDER BY username;');

I mention this because, again, it doesn't have to be complex, nor should it be.

Exactly... sometimes the complexity of the code and the skill level of the programmer is found in the simplicity of their code.

Amatuers always tend to find the most difficult way of doing things that are usually very simple. Why write 50 lines of code for something that can be done with 10?

[sathenzar]

exactly :) I see that now. Well this contest is closed. I'm going to take an hour to decide the winner (this is going to be kind of hard) then pm the winner. Please have a paypal account it'll make this all go much easier.

[the shig]

howdy.

Firstly hello.

Saw this contest was closed, but though a late entrant may be allowed.

The following is not my code, but is the most complex code I have seen. I've tried to decipher it line by line a few times but never had any success.

I stumbled across it whilst looking at latent semantic indexing. Something used by search engines.

Basically, you take a term/document matrix and calculate the singular value decomposition. You can then use the matrices calculated to identify similar documents -e.g. google's similar pages link.

This php version is only useful for small matrices, so wasn't useful for what I needed it for. Anyhow it works, is complex and fits on two pages if you remove comments and change the font size to about 4 :).

hope you like

<?php
/**
* @package JAMA
*
* For an m-by-n matrix A with m >= n, the singular value decomposition is
* an m-by-n orthogonal matrix U, an n-by-n diagonal matrix S, and
* an n-by-n orthogonal matrix V so that A = U*S*V'.
*
* The singular values, sigma[$k] = S[$k][$k], are ordered so that
* sigma[0] >= sigma[1] >= ... >= sigma[n-1].
*
* The singular value decompostion always exists, so the constructor will
* never fail.  The matrix condition number and the effective numerical
* rank can be computed from this decomposition.
*
* @author  Paul Meagher
* @license PHP v3.0
* @version 1.1
*/
class SingularValueDecomposition  {

  /**
  * Internal storage of U.
  * @var array
  */
  var $U = array();

  /**
  * Internal storage of V.
  * @var array
  */
  var $V = array();

  /**
  * Internal storage of singular values.
  * @var array
  */
  var $s = array();

  /**
  * Row dimension.
  * @var int
  */
  var $m;

  /**
  * Column dimension.
  * @var int
  */
  var $n;

  /**
  * Construct the singular value decomposition
  *
  * Derived from LINPACK code.
  *
  * @param $A Rectangular matrix
  * @return Structure to access U, S and V.
  */
  function SingularValueDecomposition ($Arg) {

	// Initialize.

	$A = $Arg->getArrayCopy();
	$this->m = $Arg->getRowDimension();
	$this->n = $Arg->getColumnDimension();
	$nu	  = min($this->m, $this->n);
	$e	   = array();
	$work	= array();
	$wantu   = true;
	$wantv   = true;	  
	$nct = min($this->m - 1, $this->n);
	$nrt = max(0, min($this->n - 2, $this->m));   

	// Reduce A to bidiagonal form, storing the diagonal elements
	// in s and the super-diagonal elements in e.

	for ($k = 0; $k < max($nct,$nrt); $k++) {

	  if ($k < $nct) {
		// Compute the transformation for the k-th column and
		// place the k-th diagonal in s[$k].
		// Compute 2-norm of k-th column without under/overflow.
		$this->s[$k] = 0;
		for ($i = $k; $i < $this->m; $i++)
		  $this->s[$k] = hypo($this->s[$k], $A[$i][$k]);
		if ($this->s[$k] != 0.0) {
		  if ($A[$k][$k] < 0.0)
			$this->s[$k] = -$this->s[$k];
		  for ($i = $k; $i < $this->m; $i++)
			$A[$i][$k] /= $this->s[$k];
		  $A[$k][$k] += 1.0;
		}
		$this->s[$k] = -$this->s[$k];
	  }		   

	  for ($j = $k + 1; $j < $this->n; $j++) {
		if (($k < $nct) & ($this->s[$k] != 0.0)) {
		  // Apply the transformation.
		  $t = 0;
		  for ($i = $k; $i < $this->m; $i++)
			$t += $A[$i][$k] * $A[$i][$j];
		  $t = -$t / $A[$k][$k];
		  for ($i = $k; $i < $this->m; $i++)
			$A[$i][$j] += $t * $A[$i][$k];
		  // Place the k-th row of A into e for the
		  // subsequent calculation of the row transformation.
		  $e[$j] = $A[$k][$j];
		}
	  }

	  if ($wantu AND ($k < $nct)) {
		// Place the transformation in U for subsequent back
		// multiplication.
		for ($i = $k; $i < $this->m; $i++)
		  $this->U[$i][$k] = $A[$i][$k];
	  }

	  if ($k < $nrt) {
		// Compute the k-th row transformation and place the
		// k-th super-diagonal in e[$k].
		// Compute 2-norm without under/overflow.
		$e[$k] = 0;
		for ($i = $k + 1; $i < $this->n; $i++)
		  $e[$k] = hypo($e[$k], $e[$i]);
		if ($e[$k] != 0.0) {
		  if ($e[$k+1] < 0.0)
			$e[$k] = -$e[$k];
		  for ($i = $k + 1; $i < $this->n; $i++)
			$e[$i] /= $e[$k];
		  $e[$k+1] += 1.0;
		}
		$e[$k] = -$e[$k];
		if (($k+1 < $this->m) AND ($e[$k] != 0.0)) {
		  // Apply the transformation.
		  for ($i = $k+1; $i < $this->m; $i++)
			$work[$i] = 0.0;
		  for ($j = $k+1; $j < $this->n; $j++)
			for ($i = $k+1; $i < $this->m; $i++)
			  $work[$i] += $e[$j] * $A[$i][$j];
		  for ($j = $k + 1; $j < $this->n; $j++) {
			$t = -$e[$j] / $e[$k+1];
			for ($i = $k + 1; $i < $this->m; $i++)
			  $A[$i][$j] += $t * $work[$i];
		  }
		}
		if ($wantv) {
		  // Place the transformation in V for subsequent
		  // back multiplication.
		  for ($i = $k + 1; $i < $this->n; $i++)
			$this->V[$i][$k] = $e[$i];
		}		
	  }
	} 

	// Set up the final bidiagonal matrix or order p.
	$p = min($this->n, $this->m + 1);
	if ($nct < $this->n)
	  $this->s[$nct] = $A[$nct][$nct];
	if ($this->m < $p)
	  $this->s[$p-1] = 0.0;
	if ($nrt + 1 < $p)
	  $e[$nrt] = $A[$nrt][$p-1];
	$e[$p-1] = 0.0;
	// If required, generate U.
	if ($wantu) {
	  for ($j = $nct; $j < $nu; $j++) {
		for ($i = 0; $i < $this->m; $i++)
		  $this->U[$i][$j] = 0.0;
		$this->U[$j][$j] = 1.0;
	  }
	  for ($k = $nct - 1; $k >= 0; $k--) {
		if ($this->s[$k] != 0.0) {
		  for ($j = $k + 1; $j < $nu; $j++) {
			$t = 0;
			for ($i = $k; $i < $this->m; $i++)
			  $t += $this->U[$i][$k] * $this->U[$i][$j];
			$t = -$t / $this->U[$k][$k];
			for ($i = $k; $i < $this->m; $i++)
			  $this->U[$i][$j] += $t * $this->U[$i][$k];
		  }
		  for ($i = $k; $i < $this->m; $i++ )
			$this->U[$i][$k] = -$this->U[$i][$k];
		  $this->U[$k][$k] = 1.0 + $this->U[$k][$k];
		  for ($i = 0; $i < $k - 1; $i++)
			 $this->U[$i][$k] = 0.0;
		 } else {
		   for ($i = 0; $i < $this->m; $i++)
			 $this->U[$i][$k] = 0.0;
		   $this->U[$k][$k] = 1.0;
		 }
	  }
	}

	// If required, generate V.
	if ($wantv) {
	  for ($k = $this->n - 1; $k >= 0; $k--) {
		if (($k < $nrt) AND ($e[$k] != 0.0)) {
		  for ($j = $k + 1; $j < $nu; $j++) {
			$t = 0;
			for ($i = $k + 1; $i < $this->n; $i++)
			  $t += $this->V[$i][$k]* $this->V[$i][$j];
			$t = -$t / $this->V[$k+1][$k];
			for ($i = $k + 1; $i < $this->n; $i++)
			  $this->V[$i][$j] += $t * $this->V[$i][$k];
		  }
		}
		for ($i = 0; $i < $this->n; $i++)
		   $this->V[$i][$k] = 0.0;
		$this->V[$k][$k] = 1.0;
	  }
	}

	// Main iteration loop for the singular values.
	$pp   = $p - 1;
	$iter = 0;
	$eps  = pow(2.0, -52.0);
	while ($p > 0) {	  

	  // Here is where a test for too many iterations would go.
	  // This section of the program inspects for negligible
	  // elements in the s and e arrays.  On completion the
	  // variables kase and k are set as follows:
	  // kase = 1  if s(p) and e[k-1] are negligible and k<p
	  // kase = 2  if s(k) is negligible and k<p
	  // kase = 3  if e[k-1] is negligible, k<p, and
	  //		   s(k), ..., s(p) are not negligible (qr step).
	  // kase = 4  if e(p-1) is negligible (convergence).

	  for ($k = $p - 2; $k >= -1; $k--) {
		if ($k == -1)
		  break;
		if (abs($e[$k]) <= $eps * (abs($this->s[$k]) + abs($this->s[$k+1]))) {
		  $e[$k] = 0.0;
		  break;
		}
	  }
	  if ($k == $p - 2)
		$kase = 4;
	  else {
		for ($ks = $p - 1; $ks >= $k; $ks--) {
		  if ($ks == $k)
			break;
		  $t = ($ks != $p ? abs($e[$ks]) : 0.) + ($ks != $k + 1 ? abs($e[$ks-1]) : 0.);
		  if (abs($this->s[$ks]) <= $eps * $t)  {
			$this->s[$ks] = 0.0;
			break;
		  }
		}
		if ($ks == $k)
		   $kase = 3;
		else if ($ks == $p-1)
		   $kase = 1;
		else {
		   $kase = 2;
		   $k = $ks;
		}
	  }
	  $k++;

	  // Perform the task indicated by kase.
	  switch ($kase) {
		 // Deflate negligible s(p).
		 case 1:
		   $f = $e[$p-2];
		   $e[$p-2] = 0.0;
		   for ($j = $p - 2; $j >= $k; $j--) {
			 $t  = hypo($this->s[$j],$f);
			 $cs = $this->s[$j] / $t;
			 $sn = $f / $t;
			 $this->s[$j] = $t;
			 if ($j != $k) {
			   $f = -$sn * $e[$j-1];
			   $e[$j-1] = $cs * $e[$j-1];
			 }
			 if ($wantv) {
			   for ($i = 0; $i < $this->n; $i++) {
				 $t = $cs * $this->V[$i][$j] + $sn * $this->V[$i][$p-1];
				 $this->V[$i][$p-1] = -$sn * $this->V[$i][$j] + $cs * $this->V[$i][$p-1];
				 $this->V[$i][$j] = $t;
			   }
			 }
		   }
		   break;
		 // Split at negligible s(k).
		 case 2:
		   $f = $e[$k-1];
		   $e[$k-1] = 0.0;
		   for ($j = $k; $j < $p; $j++) {
			 $t = hypo($this->s[$j], $f);
			 $cs = $this->s[$j] / $t;
			 $sn = $f / $t;
			 $this->s[$j] = $t;
			 $f = -$sn * $e[$j];
			 $e[$j] = $cs * $e[$j];
			 if ($wantu) {
			   for ($i = 0; $i < $this->m; $i++) {
				 $t = $cs * $this->U[$i][$j] + $sn * $this->U[$i][$k-1];
				 $this->U[$i][$k-1] = -$sn * $this->U[$i][$j] + $cs * $this->U[$i][$k-1];
				 $this->U[$i][$j] = $t;
			   }
			 }
		   }
		   break;		   
		 // Perform one qr step.
		 case 3:				  
		   // Calculate the shift.						  
		   $scale = max(max(max(max(
					abs($this->s[$p-1]),abs($this->s[$p-2])),abs($e[$p-2])),
					abs($this->s[$k])), abs($e[$k]));
		   $sp   = $this->s[$p-1] / $scale;
		   $spm1 = $this->s[$p-2] / $scale;
		   $epm1 = $e[$p-2] / $scale;
		   $sk   = $this->s[$k] / $scale;
		   $ek   = $e[$k] / $scale;
		   $b	= (($spm1 + $sp) * ($spm1 - $sp) + $epm1 * $epm1) / 2.0;
		   $c	= ($sp * $epm1) * ($sp * $epm1);
		   $shift = 0.0;
		   if (($b != 0.0) || ($c != 0.0)) {
			 $shift = sqrt($b * $b + $c);
			 if ($b < 0.0)
			   $shift = -$shift;
			 $shift = $c / ($b + $shift);
		   }
		   $f = ($sk + $sp) * ($sk - $sp) + $shift;
		   $g = $sk * $ek;  
		   // Chase zeros.  
		   for ($j = $k; $j < $p-1; $j++) {
			 $t  = hypo($f,$g);
			 $cs = $f/$t;
			 $sn = $g/$t;
			 if ($j != $k)
			   $e[$j-1] = $t;
			 $f = $cs * $this->s[$j] + $sn * $e[$j];
			 $e[$j] = $cs * $e[$j] - $sn * $this->s[$j];
			 $g = $sn * $this->s[$j+1];
			 $this->s[$j+1] = $cs * $this->s[$j+1];
			 if ($wantv) {
			   for ($i = 0; $i < $this->n; $i++) {
				 $t = $cs * $this->V[$i][$j] + $sn * $this->V[$i][$j+1];
				 $this->V[$i][$j+1] = -$sn * $this->V[$i][$j] + $cs * $this->V[$i][$j+1];
				 $this->V[$i][$j] = $t;
			   }
			 }																	  
			 $t = hypo($f,$g);
			 $cs = $f/$t;
			 $sn = $g/$t;
			 $this->s[$j] = $t;
			 $f = $cs * $e[$j] + $sn * $this->s[$j+1];
			 $this->s[$j+1] = -$sn * $e[$j] + $cs * $this->s[$j+1];
			 $g = $sn * $e[$j+1];
			 $e[$j+1] = $cs * $e[$j+1];
			 if ($wantu && ($j < $this->m - 1)) {
			   for ($i = 0; $i < $this->m; $i++) {
				 $t = $cs * $this->U[$i][$j] + $sn * $this->U[$i][$j+1];
				 $this->U[$i][$j+1] = -$sn * $this->U[$i][$j] + $cs * $this->U[$i][$j+1];
				 $this->U[$i][$j] = $t;
			   }
			 }				
		   }
		   $e[$p-2] = $f;
		   $iter = $iter + 1;
		   break;
		 // Convergence.
		 case 4:
		   // Make the singular values positive.
		   if ($this->s[$k] <= 0.0) {
			 $this->s[$k] = ($this->s[$k] < 0.0 ? -$this->s[$k] : 0.0);
			 if ($wantv) {
			   for ($i = 0; $i <= $pp; $i++)
				 $this->V[$i][$k] = -$this->V[$i][$k];
			 }
		   }
		   // Order the singular values.  
		   while ($k < $pp) {
			if ($this->s[$k] >= $this->s[$k+1])
			  break;
			$t = $this->s[$k];
			$this->s[$k] = $this->s[$k+1];
			$this->s[$k+1] = $t;
			if ($wantv AND ($k < $this->n - 1)) {
			  for ($i = 0; $i < $this->n; $i++) {
				$t = $this->V[$i][$k+1];
				$this->V[$i][$k+1] = $this->V[$i][$k];
				$this->V[$i][$k] = $t;
			  }
			}
			if ($wantu AND ($k < $this->m-1)) {
			  for ($i = 0; $i < $this->m; $i++) {
				$t = $this->U[$i][$k+1];
				$this->U[$i][$k+1] = $this->U[$i][$k];
				$this->U[$i][$k] = $t;
			  }
			}
			$k++;
		   }
		   $iter = 0;
		   $p--;
		   break;								   
	  } // end switch	  
	} // end while

	/*
	echo "<p>Output A</p>";   
	$A = new Matrix($A);		
	$A->toHTML();

	echo "<p>Matrix U</p>";	
	echo "<pre>";
	print_r($this->U);		
	echo "</pre>";

	echo "<p>Matrix V</p>";	
	echo "<pre>";
	print_r($this->V);		
	echo "</pre>";	

	echo "<p>Vector S</p>";	
	echo "<pre>";
	print_r($this->s);		
	echo "</pre>";	
	exit;
	*/

  } // end constructor

  /**
  * Return the left singular vectors
  * @access public
  * @return U
  */
  function getU() {
	return new Matrix($this->U, $this->m, min($this->m + 1, $this->n));
  }

  /**
  * Return the right singular vectors
  * @access public   
  * @return V
  */
  function getV() {
	return new Matrix($this->V);
  }

  /**
  * Return the one-dimensional array of singular values
  * @access public   
  * @return diagonal of S.
  */
  function getSingularValues() {
	return $this->s;
  }

  /**
  * Return the diagonal matrix of singular values
  * @access public   
  * @return S
  */
  function getS() {
	for ($i = 0; $i < $this->n; $i++) {
	  for ($j = 0; $j < $this->n; $j++)
		$S[$i][$j] = 0.0;
	  $S[$i][$i] = $this->s[$i];
	}
	return new Matrix($S);
  }

  /**
  * Two norm
  * @access public   
  * @return max(S)
  */
  function norm2() {
	return $this->s[0];
  }

  /**
  * Two norm condition number
  * @access public   
  * @return max(S)/min(S)
  */
  function cond() {
	return $this->s[0] / $this->s[min($this->m, $this->n) - 1];
  }

  /**
  * Effective numerical matrix rank
  * @access public   
  * @return Number of nonnegligible singular values.
  */
  function rank() {
	$eps = pow(2.0, -52.0);
	$tol = max($this->m, $this->n) * $this->s[0] * $eps;
	$r = 0;
	for ($i = 0; $i < count($this->s); $i++) {
	  if ($this->s[$i] > $tol)
		$r++;
	}
	return $r;
  }
}
?>