<?php
	/**
	* Has a few functions, but primary role is to load the phpgwapi
	* @author Dan Kuykendall <seek3r@phpgroupware.org>
	* @author Joseph Engo <jengo@phpgroupware.org>
	* @copyright Copyright (C) 2000-2004 Free Software Foundation, Inc. http://www.fsf.org/
	* @license http://www.fsf.org/licenses/lgpl.html GNU Lesser General Public License
	* @package phpgwapi
	* @subpackage utilities
	* @version $Id: common_functions.inc.php 21217 2010-06-02 09:21:48Z Caeies $
	*/

	/****************************************************************************\
	 * Direct functions which are not part of the API classes                    *
	 * because they are required to be available at the lowest level.            *
	 \***************************************************************************/
	/*!
	 @collection_start direct functions
	 @abstract Direct functions which are not part of the API classes because they are required to be available at the lowest level.
	*/

	/*!
	 @function safe_args
	 @abstract Allows for array and direct function params as well as sanatization.
	 @author seek3r
	 @discussion This function is used to validate param data as well as offer flexible function usage.
	 @syntax safe_args($expected_args, $recieved_args,__LINE__,__FILE__);
	 @example 
		function somefunc()
		{
			$expected_args[0] = Array('name'=>'fname','default'=>'joe', 'type'=>'string');
			$expected_args[1] = Array('name'=>'mname','default'=>'hick', 'type'=>'string');
			$expected_args[2] = Array('name'=>'lname','default'=>'bob', 'type'=>'string');
			$recieved_args = func_get_args();
			$args = safe_args($expected_args, $recieved_args,__LINE__,__FILE__);
			echo 'Full name: '.$args['fname'].' '.$args['fname'].' '.$args['lname'].'<br />';
			//default result would be:
			// Full name: joe hick bob<br />
		}
		
		Using this it is possible to use the function in any of the following ways
		somefunc('jack','city','brown');
		or
		somefunc(array('fname'=>'jack','mname'=>'city','lname'=>'brown'));
		or
		somefunc(array('lname'=>'brown','fname'=>'jack','mname'=>'city'));
		
		For the last one, when using named params in an array you dont have to follow any order
		All three would result in - Full name: jack city brown<br />
		
		When you use this method of handling params you can secure your functions as well offer
		flexibility needed for both normal use and web services use.
		If you have params that are required just set the default as ##REQUIRED##
		Users of your functions can also use ##DEFAULT## to use your default value for a param 
		when using the standard format like this:
		somefunc('jack','##DEFAULT##','brown');
		This would result in - Full name: jack hick brown<br />
		Its using the default value for the second param.
		Of course if you have the second param as a required field it will fail to work.
	*/
	function safe_args($expected, $recieved, $line='??', $file='??')
	{
		/* This array will contain all the required fields */
		$required = Array();

		/* This array will contain all types for sanatization checking */
		/* only used when an array is passed as the first arg          */
		$types = Array();
		
		/* start by looping thru the expected list and set params with */
		/* the default values                                          */
		$num = count($expected);
    for ($i = 0; $i < $num; $i++)
		{
			$args[$expected[$i]['name']] = $expected[$i]['default'];
			if ($expected[$i]['default'] === '##REQUIRED##')
			{
				$required[$expected[$i]['name']] = True;
			}
			$types[$expected[$i]['name']] = $expected[$i]['type']; 
 		}
		
		/* Make sure they passed at least one param */
		if(count($recieved) != 0)
		{
			/* if used as standard function we loop thru and set by position */
			if(!is_array($recieved[0]))
			{
		    for ($i = 0; $i < $num; $i++)
				{
					if(isset($recieved[$i]) && $recieved[$i] !== '##DEFAULT##')
					{
						if(sanitize($recieved[$i],$expected[$i]['type']))
						{
							$args[$expected[$i]['name']] = $recieved[$i];
							unset($required[$expected[$i]['name']]);
						}
						else
						{
							echo 'Fatal Error: Invalid paramater type for '.$expected[$i]['name'].' on line '.$line.' of '.$file.'<br />';
							exit;
						}
					}
   			}
			}
			/* if used as standard function we loop thru and set by position */
			else
			{
		    for ($i = 0; $i < $num; $i++)
				{
					$types[$expected[$i]['name']] = $expected[$i]['type']; 
 				}
				while(list($key,$val) = each($recieved[0]))
				{
					if($val !== '##DEFAULT##')
					{
						if(sanitize($val,$types[$key]) == True)
						{
							$args[$key] = $val;
							unset($required[$key]);
						}
						else
						{
							echo 'Fatal Error: Invalid paramater type for '.$key.' on line '.$line.' of '.$file.'<br />';
							exit;
						}
					}
				}
			}
		}
		if(count($required) != 0)
		{
			while (list($key) = each($required))
			{
				echo 'Fatal Error: Missing required paramater '.$key.' on line '.$line.' of '.$file.'<br />';
			}
			exit;
		}
		return $args;
	}

	/*!
	 @function sanitize
	 @abstract Validate data.
	 @author seek3r
	 @discussion This function is used to validate input data. 
	 @syntax sanitize('type', 'match string');
	 @example sanitize('number',$somestring);
	*/

	/*
	$GLOBALS['phpgw_info']['server']['sanitize_types']['number'] = Array('type' => 'preg_match', 'string' => '/^[0-9]+$/i');
	*/

	function sanitize($string,$type)
	{
		switch ($type)
		{
			case 'bool':
				if ($string == 1 || $string == 0)
				{
					return True;
				}
				break;
			case 'isprint':
				$length = strlen($string);
				$position = 0;
				while ($length > $position)
				{
					$char = substr($string, $position, 1);
					if ($char < ' ' || $char > '~')
					{
						return False;
					}
					$position = $position + 1;
				}
				return True;
				break;
			case 'alpha':
				if (preg_match("/^[a-z]+$/i", $string))
				{
					return True;
				}
				break;
			case 'number':
				if (preg_match("/^[0-9]+$/i", $string))
				{
					return True;
				}
				break;
			case 'alphanumeric':
				if (preg_match("/^[a-z0-9\.]+$/i", $string))
				{
					return True;
				}
				break;
			case 'string':
				if (preg_match("/^[a-z]+$/i", $string))
				{
					return True;
				}
				break;
			case 'ip':
				if (eregi("^[0-9]{1,3}(\.[0-9]{1,3}){3}$",$string))
				{
					$octets = split('\.',$string);
					for ($i=0; $i != count($octets); $i++)
					{
						if ($octets[$i] < 0 || $octets[$i] > 255)
						{
							return False;
						}
					}
					return True;
				}
				return False;
				break;
			case 'file':
				if (preg_match("/^[a-z0-9_]+\.+[a-z]+$/i", $string))
				{
					return True;
				}
				break;
			case 'email':
				if (eregi("^([[:alnum:]_%+=.-]+)@([[:alnum:]_.-]+)\.([a-z]{2,3}|[0-9]{1,3})$",$string))
				{
					return True;
				}
				break;
			case 'password':
				$password_length = strlen($string);
				$password_numbers = Array('0','1','2','3','4','5','6','7','8','9');
				$password_special_chars = Array(' ','~','`','!','@','#','$','%','^','&','*','(',')','_','+','-','=','{','}','|','[',']',"\\",':','"',';',"'",'<','>','?',',','.','/');

				if(@isset($GLOBALS['phpgw_info']['server']['pass_min_length']) && is_int($GLOBALS['phpgw_info']['server']['pass_min_length']) && $GLOBALS['phpgw_info']['server']['pass_min_length'] > 1)
				{
					$min_length = $GLOBALS['phpgw_info']['server']['pass_min_length'];
				}
				else
				{
					$min_length = 1;
				}

				if(@isset($GLOBALS['phpgw_info']['server']['pass_require_non_alpha']) && $GLOBALS['phpgw_info']['server']['pass_require_non_alpha'] == True)
				{
					$pass_verify_non_alpha = False;
				}
				else
				{
					$pass_verify_non_alpha = True;
				}
				
				if(@isset($GLOBALS['phpgw_info']['server']['pass_require_numbers']) && $GLOBALS['phpgw_info']['server']['pass_require_numbers'] == True)
				{
					$pass_verify_num = False;
				}
				else
				{
					$pass_verify_num = True;
				}

				if(@isset($GLOBALS['phpgw_info']['server']['pass_require_special_char']) && $GLOBALS['phpgw_info']['server']['pass_require_special_char'] == True)
				{
					$pass_verify_special_char = False;
				}
				else
				{
					$pass_verify_special_char = True;
				}
				
				if ($password_length >= $min_length)
				{
					for ($i=0; $i != $password_length; $i++)
					{
						$cur_test_string = substr($string, $i, 1);
						if (in_array($cur_test_string, $password_numbers) || in_array($cur_test_string, $password_special_chars))
						{
							$pass_verify_non_alpha = True;
							if (in_array($cur_test_string, $password_numbers))
							{
								$pass_verify_num = True;
							}
							elseif (in_array($cur_test_string, $password_special_chars))
							{
								$pass_verify_special_char = True;
							}
						}
					}

					if ($pass_verify_num == False)
					{
						$GLOBALS['phpgw_info']['flags']['msgbox_data']['Password requires at least one non-alpha character']=False;
					}

					if ($pass_verify_num == False)
					{
						$GLOBALS['phpgw_info']['flags']['msgbox_data']['Password requires at least one numeric character']=False;
					}

					if ($pass_verify_special_char == False)
					{
						$GLOBALS['phpgw_info']['flags']['msgbox_data']['Password requires at least one special character (non-letter and non-number)']=False;
					}
					
					if ($pass_verify_num == True && $pass_verify_special_char == True)
					{
						return True;
					}
					return False;
				}
				$GLOBALS['phpgw_info']['flags']['msgbox_data']['Password must be at least '.$min_length.' characters']=False;
				return False;
				break;
			case 'any':
				return True;
				break;
			default :
				if (isset($GLOBALS['phpgw_info']['server']['sanitize_types'][$type]['type']))
				{
					if ($GLOBALS['phpgw_info']['server']['sanitize_types'][$type]['type']($GLOBALS['phpgw_info']['server']['sanitize_types'][$type]['string'], $string))
					{
						return True;
					}
				}
				return False;
		}
	}

	function reg_var($varname, $method = 'any', $valuetype = 'alphanumeric',$default_value='',$register=True)
	{
		if($method == 'any')
		{
			$method = Array('POST','GET','COOKIE','SERVER','GLOBAL','DEFAULT');
		}
		elseif(!is_array($method))
		{
			$method = Array($method);
		}
		$cnt = count($method);
		for($i=0;$i<$cnt;$i++)
		{
			switch(strtoupper($method[$i]))
			{
				case 'DEFAULT':
					if($default_value)
					{
						$value = $default_value;
						$i = $cnt+1; /* Found what we were looking for, now we end the loop */
					}
					break;
				case 'GLOBAL':
					if(@isset($GLOBALS[$varname]))
					{
						$value = $GLOBALS[$varname];
						$i = $cnt+1;
					}
					break;
				case 'POST':
				case 'GET':
				case 'COOKIE':
				case 'SERVER':
					$meth = '_'.strtoupper($method[$i]);
					if(@isset($GLOBALS[$meth][$varname]))
					{
						$value = $GLOBALS[$meth][$varname];
						$i = $cnt+1;
					}
					break;
				default:
					if(@isset($GLOBALS[strtoupper($method[$i])][$varname]))
					{
						$value = $GLOBALS[strtoupper($method[$i])][$varname];
						$i = $cnt+1;
					}
			}
		}

		if (!@isset($value))
		{
			$value = $default_value;
		}

		if (!@is_array($value))
		{
			if ($value == '')
			{
				$result = $value;
			}
			else
			{
				if (sanitize($value,$valuetype) == 1)
				{
					$result = $value;
				}
				else
				{
					$result = $default_value;
				}
			}
		}
		else
		{
			reset($value);
			while(list($k, $v) = each($value))
			{
				if ($v == '')
				{
					$result[$k] = $v;
				}
				else
				{
					if (is_array($valuetype))
					{
						$vt = $valuetype[$k];
					}
					else
					{
						$vt = $valuetype;
					}

					if (sanitize($v,$vt) == 1)
					{
						$result[$k] = $v;
					}
					else
					{
						if (is_array($default_value))
						{
							$result[$k] = $default_value[$k];
						}
						else
						{
							$result[$k] = $default_value;
						}
					}
				}
			}
		}
		if($register)
		{
			$GLOBALS['phpgw_info'][$GLOBALS['phpgw_info']['flags']['currentapp']][$varname] = $result;
		}
		return $result;
	}

	/*!
	 @function get_var
	 @abstract retrieve a value from either a POST, GET, COOKIE, SERVER or from a class variable.
	 @author skeeter
	 @discussion This function is used to retrieve a value from a user defined order of methods. 
	 @syntax get_var('id',array('POST','GET','COOKIE','GLOBAL','DEFAULT'));
	 @example $this->id = get_var('id',array('POST','GET','COOKIE','GLOBAL','DEFAULT'));
	 @param $variable name
	 @param $method ordered array of methods to search for supplied variable
	 @param $default_value (optional)
	*/
	function get_var($variable,$method='any',$default_value='')
	{
		return reg_var($variable,$method,'any',$default_value,False);
	}

	/*!
	 @function include_class
	 @abstract This will include the class once and guarantee that it is loaded only once.  Similar to CreateObject, but does not instantiate the class.
	 @author skeeter
	 @discussion This will include the API class once and guarantee that it is loaded only once.  Similar to CreateObject, but does not instantiate the class.
	 @syntax include_class('setup');
	 @example include_class('setup');
	 @param $included_class API class to load
	*/
	function include_class($included_class)
	{
		if (!isset($GLOBALS['phpgw_info']['flags']['included_classes'][$included_class]) ||
			!$GLOBALS['phpgw_info']['flags']['included_classes'][$included_class])
		{
			$GLOBALS['phpgw_info']['flags']['included_classes'][$included_class] = True;   
			include_once(PHPGW_SERVER_ROOT.'/phpgwapi/inc/class.'.$included_class.'.inc.php');
		}
	}

	/*!
	 @function CreateObject
	 @abstract Load a class and include the class file if not done so already.
	 @author mdean
	 @author milosch
	 @author (thanks to jengo and ralf)
	 @discussion This function is used to create an instance of a class, and if the class file has not been included it will do so. 
	 @syntax CreateObject('app.class', 'constructor_params');
	 @example $phpgw->acl = CreateObject('phpgwapi.acl');
	 @param $classname name of class
	 @param $p1-$p16 class parameters (all optional)
	*/
	function CreateObject($class,
		$p1='_UNDEF_',$p2='_UNDEF_',$p3='_UNDEF_',$p4='_UNDEF_',
		$p5='_UNDEF_',$p6='_UNDEF_',$p7='_UNDEF_',$p8='_UNDEF_',
		$p9='_UNDEF_',$p10='_UNDEF_',$p11='_UNDEF_',$p12='_UNDEF_',
		$p13='_UNDEF_',$p14='_UNDEF_',$p15='_UNDEF_',$p16='_UNDEF_')
	{
		global $phpgw_info, $phpgw;

		if (is_object(@$GLOBALS['phpgw']->log) && $class != 'phpgwapi.error' && $class != 'phpgwapi.errorlog')
		{
			//$GLOBALS['phpgw']->log->write(array('text'=>'D-Debug, dbg: %1','p1'=>'This class was run: '.$class,'file'=>__FILE__,'line'=>__LINE__));
		}

		/* error_reporting(0); */
		list($appname,$classname) = explode('.', $class);
		$filename = PHPGW_INCLUDE_ROOT.'/'.$appname.'/inc/class.'.$classname.'.inc.php';
		$included_files = get_included_files();

		if (!isset($included_files[$filename]))
		{
			if(@file_exists($filename))
			{
				include_once($filename);
				$is_included = True;
			}
			else
			{
				$is_included = False;
			}
		}
		else
		{
			$is_included = True;
		}
		
		if($is_included)
		{
			if ($p1 == '_UNDEF_' && $p1 != 1)
			{
				$obj = new $classname;
			}
			else
			{
				$input = array($p1,$p2,$p3,$p4,$p5,$p6,$p7,$p8,$p9,$p10,$p11,$p12,$p13,$p14,$p15,$p16);
				$i = 1;
				$code = '$obj = new ' . $classname . '(';
				while (list($x,$test) = each($input))
				{
					if (($test == '_UNDEF_' && $test != 1 ) || $i == 17)
					{
						break;
					}
					else
					{
						$code .= '$p' . $i . ',';
					}
					$i++;
				}
				$code = substr($code,0,-1) . ');';
				eval($code);
			}
			/* error_reporting(E_ERROR | E_WARNING | E_PARSE); */
			return $obj;
		}
	}

	/*!
	 @function ExecMethod
	 @abstract Execute a function, and load a class and include the class file if not done so already.
	 @author seek3r
	 @discussion This function is used to create an instance of a class, and if the class file has not been included it will do so.
	 @syntax ExecObject('app.class', 'constructor_params');
	 @param $method to execute
	 @param $functionparams function param should be an array
	 @param $loglevel developers choice of logging level
	 @param $classparams params to be sent to the contructor
	 @example ExecObject('phpgwapi.acl.read');
	*/
	function ExecMethod($method, $functionparams = '_UNDEF_', $loglevel = 3, $classparams = '_UNDEF_')
	{
		/* Need to make sure this is working against a single dimensional object */
		$partscount = count(explode('.',$method)) - 1;
		if ($partscount == 2)
		{
			list($appname,$classname,$functionname) = explode(".", $method);
			if (!is_object($GLOBALS[$classname]))
			{
				if ($classparams != '_UNDEF_' && ($classparams || $classparams != 'True'))
				{
					$GLOBALS[$classname] = CreateObject($appname.'.'.$classname, $classparams);
				}
				else
				{
					$GLOBALS[$classname] = CreateObject($appname.'.'.$classname);
				}
			}

			if ((is_array($functionparams) || $functionparams != '_UNDEF_') && ($functionparams || $functionparams != 'True'))
			{
				return $GLOBALS[$classname]->$functionname($functionparams);
			}
			else
			{
				return $GLOBALS[$classname]->$functionname();
			}
		}
		/* if the $method includes a parent class (multi-dimensional) then we have to work from it */
		elseif ($partscount >= 3)
		{
			$GLOBALS['methodparts'] = explode(".", $method);
			$classpartnum = $partscount - 1;
			$appname = $GLOBALS['methodparts'][0];
			$classname = $GLOBALS['methodparts'][$classpartnum];
			$functionname = $GLOBALS['methodparts'][$partscount];
			/* Now I clear these out of the array so that I can do a proper */
			/* loop and build the $parentobject */
			unset ($GLOBALS['methodparts'][0]);
			unset ($GLOBALS['methodparts'][$classpartnum]);
			unset ($GLOBALS['methodparts'][$partscount]);
			reset ($GLOBALS['methodparts']);
			$firstparent = 'True';
			while (list ($key, $val) = each ($GLOBALS['methodparts']))
			{
				if ($firstparent == 'True')
				{
					$parentobject = '$GLOBALS["'.$val.'"]';
					$firstparent = False;
				}
				else
				{
					$parentobject .= '->'.$val;
				}
			}
			unset($GLOBALS['methodparts']);
			
			if (! @is_object($$parentobject->$classname) )
			{
				if ($classparams != '_UNDEF_' && ($classparams || $classparams != 'True'))
				{
					$$parentobject->$classname = CreateObject($appname.'.'.$classname, $classparams);
				}
				else
				{
					$$parentobject->$classname = CreateObject($appname.'.'.$classname);
				}
			}

			if ($functionparams != '_UNDEF_' && ($functionparams || $functionparams != 'True'))
			{
				return $$parentobject->$classname->$functionname($functionparams);
			}
			else
			{
				return $returnval = $$parentobject->$classname->$functionname();
			}
		}
		else
		{
			return 'error in parts';
		}
	}

	/*!
	 @function get_account_id
	 @abstract Return a properly formatted account_id.
	 @author skeeter
	 @discussion This function will return a properly formatted account_id. This can take either a name or an account_id as paramters. If a name is provided it will return the associated id.
	 @syntax get_account_id($accountid);
	 @example $account_id = get_account_id($accountid);
	 @param $account_id either a name or an id
	 @param $default_id either a name or an id
	*/
	function get_account_id($account_id = '',$default_id = '')
	{
		if (gettype($account_id) == 'integer')
		{
			return $account_id;
		}
		elseif ($account_id == '')
		{
			if ($default_id == '')
			{
				return (isset($GLOBALS['phpgw_info']['user']['account_id'])?$GLOBALS['phpgw_info']['user']['account_id']:0);
			}
			elseif (is_string($default_id))
			{
				return $GLOBALS['phpgw']->accounts->name2id($default_id);
			}
			return intval($default_id);
		}
		elseif (is_string($account_id))
		{
			if($GLOBALS['phpgw']->accounts->exists(intval($account_id)) == True)
			{
				return intval($account_id);
			}
			else
			{
				return $GLOBALS['phpgw']->accounts->name2id($account_id);
			}
		}
	}

	/*!
	 @function filesystem_separator
	 @abstract sets the file system seperator depending on OS
	 @result file system separator
	*/
	function filesystem_separator()
	{
		if (PHP_OS == 'Windows' || PHP_OS == 'OS/2')
		{
			return '\\';
		}
		else
		{
			return '/';
		}
	}

	/* Just a wrapper to my new print_r() function I added to the php3 support file.  Seek3r */
	function _debug_array($array,$print=True)
	{
		$four = False;
		if(@floor(phpversion()) >= 4)
		{
			$four = True;
		}
		if($four)
		{
			if(!$print)
			{
				ob_start();
			}
			echo '<pre>';
			print_r($array);
			echo '</pre>';
			if(!$print)
			{
				$v = ob_get_contents();
				ob_end_clean();
				return $v;
			}
		}
		else
		{
			return print_r($array,False,$print);
		}
	}

	/*
	@function alessthanb
	@abstract phpgw version checking, is param 1 < param 2 in phpgw versionspeak?
	@param	$a	phpgw version number to check if less than $b
	@param	$b	phpgw version number to check $a against
	#return	True if $a < $b
	*/
	function alessthanb($a,$b,$DEBUG=False)
	{
		$num = array('1st','2nd','3rd','4th');

		if ($DEBUG)
		{
			echo'<br />Input values: '
				. 'A="'.$a.'", B="'.$b.'"';
		}
		$newa = ereg_replace('pre','.',$a);
		$newb = ereg_replace('pre','.',$b);
		$testa = explode('.',$newa);
		if(@$testa[1] == '')
		{
			$testa[1] = 0;
		}
		if(@$testa[3] == '')
		{
			$testa[3] = 0;
		}
		$testb = explode('.',$newb);
		if(@$testb[1] == '')
		{
			$testb[1] = 0;
		}
		if(@$testb[3] == '')
		{
			$testb[3] = 0;
		}
		$less = 0;

		for ($i=0;$i<count($testa);$i++)
		{
			if ($DEBUG) { echo'<br />Checking if '. intval($testa[$i]) . ' is less than ' . intval($testb[$i]) . ' ...'; }
			if (intval($testa[$i]) < intval($testb[$i]))
			{
				if ($DEBUG) { echo ' yes.'; }
				$less++;
				if ($i<3)
				{
					/* Ensure that this is definitely smaller */
					if ($DEBUG) { echo"  This is the $num[$i] octet, so A is definitely less than B."; }
					$less = 5;
					break;
				}
			}
			elseif(intval($testa[$i]) > intval($testb[$i]))
			{
				if ($DEBUG) { echo ' no.'; }
				$less--;
				if ($i<2)
				{
					/* Ensure that this is definitely greater */
					if ($DEBUG) { echo"  This is the $num[$i] octet, so A is definitely greater than B."; }
					$less = -5;
					break;
				}
			}
			else
			{
				if ($DEBUG) { echo ' no, they are equal.'; }
				$less = 0;
			}
		}
		if ($DEBUG) { echo '<br />Check value is: "'.$less.'"'; }
		if ($less>0)
		{
			if ($DEBUG) { echo '<br />A is less than B'; }
			return True;
		}
		elseif($less<0)
		{
			if ($DEBUG) { echo '<br />A is greater than B'; }
			return False;
		}
		else
		{
			if ($DEBUG) { echo '<br />A is equal to B'; }
			return False;
		}
	}

	/*!
	@function amorethanb
	@abstract phpgw version checking, is param 1 > param 2 in phpgw versionspeak?
	@param	$a	phpgw version number to check if more than $b
	@param	$b	phpgw version number to check $a against
	#return	True if $a < $b
	*/
	function amorethanb($a,$b,$DEBUG=False)
	{
		$num = array('1st','2nd','3rd','4th');

		if ($DEBUG)
		{
			echo'<br />Input values: '
				. 'A="'.$a.'", B="'.$b.'"';
		}
		$newa = ereg_replace('pre','.',$a);
		$newb = ereg_replace('pre','.',$b);
		$testa = explode('.',$newa);
		if($testa[3] == '')
		{
			$testa[3] = 0;
		}
		$testb = explode('.',$newb);
		if($testb[3] == '')
		{
			$testb[3] = 0;
		}
		$less = 0;

		for ($i=0;$i<count($testa);$i++)
		{
			if ($DEBUG) { echo'<br />Checking if '. intval($testa[$i]) . ' is more than ' . intval($testb[$i]) . ' ...'; }
			if (intval($testa[$i]) > intval($testb[$i]))
			{
				if ($DEBUG) { echo ' yes.'; }
				$less++;
				if ($i<3)
				{
					/* Ensure that this is definitely greater */
					if ($DEBUG) { echo"  This is the $num[$i] octet, so A is definitely greater than B."; }
					$less = 5;
					break;
				}
			}
			elseif(intval($testa[$i]) < intval($testb[$i]))
			{
				if ($DEBUG) { echo ' no.'; }
				$less--;
				if ($i<2)
				{
					/* Ensure that this is definitely smaller */
					if ($DEBUG) { echo"  This is the $num[$i] octet, so A is definitely less than B."; }
					$less = -5;
					break;
				}
			}
			else
			{
				if ($DEBUG) { echo ' no, they are equal.'; }
				$less = 0;
			}
		}
		if ($DEBUG) { echo '<br />Check value is: "'.$less.'"'; }
		if ($less>0)
		{
			if ($DEBUG) { echo '<br />A is greater than B'; }
			return True;
		}
		elseif($less<0)
		{
			if ($DEBUG) { echo '<br />A is less than B'; }
			return False;
		}
		else
		{
			if ($DEBUG) { echo '<br />A is equal to B'; }
			return False;
		}
	}
	
	/*!
	 @function prepend_tables_prefix
	 @abstract prepend a prefix to an array of table names
	 @author Adam Hull (aka fixe) - No copyright claim
	 @param	$prefix	the string to be prepended
	 @param	$tables	and array of tables to have the prefix prepended to
	 @return array of table names with the prefix prepended
	*/
							
	function prepend_tables_prefix($prefix,$tables)
	{
		foreach($tables as $key => $value)
		{
			$tables[$key] = $prefix.$value;
		}
		return $tables;
	}
	
	/**
	 * For users with an old php version (<4.3.0)
	 */
	if(!function_exists('html_entity_decode'))
	{
		/**
		 * Convert all HTML entities to their applicable characters.
		 *
		 * @param   string   $str          string to convert
		 * @param   string   $quote_style  optional quote_style parameter lets you define what will be done with 'single' and "double" quotes. It takes on one of three constants with the default being ENT_COMPAT
		 * @param   string   $charset      optional charset string to convert (no supported yet!)
		 * @return  string                 converted string
		 */
		function html_entity_decode($str, $quote_style=ENT_COMPAT, $charset='ISO-8859-1')
		{
			$ents = get_html_translation_table(HTML_ENTITIES, $quote_style);
			$rpl_ents = array_flip($ents);
			return (strtr($str, $rpl_ents));
		}
	}
?>
