<?php/* * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License as published by the * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General * Public License for more details. * * You should have received a copy of the GNU General Public License along * with this program; if not, write to the Free Software Foundation, Inc., * 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA *//** * validateSession() * * Returns true if a session has already been created in an * attempt to prevent abuse of the listener. */function validateSession(){	global $A; // Activity object	global $name;	$name = getName();	if (cookieVar(LACE_SESSION_COOKIE) === false && !$A->keyExists($name))	{		joinMessage($name);	}	$A->update($name);	setcookie(LACE_SESSION_COOKIE, getCookieString(), time() + 600, LACE_URL_REL);	setcookie(LACE_NAME_COOKIE, $name, time() + 2592000, LACE_URL_REL);	return true;}/** * getCookieString() * * Returns an MD5 hash of various unique info to * use as a unique identifier in a cookie */function getCookieString(){	return md5($_SERVER['HTTP_USER_AGENT'].LACE_SECRET_WORD);}/** * fixMagicQuotes() * * Remove slashes from all incoming GET/POST/COOKIE data * * Yoinked straight out of Ryan Grove's Poseidon * http://wiki.wonko.com/software/poseidon */function fixMagicQuotes(){	set_magic_quotes_runtime(0);	if (get_magic_quotes_gpc() === 0)		return;	function removeMagicSlashes($element)	{		if (is_array($element))			return array_map('removeMagicSlashes', $element);		else			return stripslashes($element);	}	// Remove slashes from all incoming GET/POST/COOKIE data.	$_GET    = array_map('removeMagicSlashes', $_GET);	$_POST   = array_map('removeMagicSlashes', $_POST);	$_COOKIE = array_map('removeMagicSlashes', $_COOKIE);}/** * duration_str() * * Turn a given number of seconds into a human readable * duration statement (e.g. 100 seconds -> '1 minute, 40 seconds' */function duration_str($seconds, $short_units = false, $min_units = false){	// This craziness converts a given number of seconds	// into a human readable time duration	//	// $short_units: use short units ('6 m' rather than '6 minutes')	// $min_units  : minimum units to return ('days' will remove hours, minutes,	// seconds)	//	// Example:	//	//		echo duration_str(time() - (time() - 3600));	//		echo duration_str(time() - (time() - 3600 * 24 * 3.5));	//		echo duration_str(time() - (time() - 60 * 250), true);	//		echo duration_str(time() - (time() - 3600 * 24 * 500), false, 'weeks');	//	// Outputs:	//	//		1 hour	//      3 days, 12 hours	//      4 h, 10 m	//		1 year, 4 months, 1 week	$seconds = abs((int)$seconds);	$periods = array	(		'years'   => array ( 31557600,'y'),		'months'  => array ( 2628000, 'mo'),		'weeks'   => array ( 604800,  'w'),		'days'    => array ( 86400,   'd'),		'hours'   => array ( 3600,    'h'),		'minutes' => array ( 60,      'm'),		'seconds' => array ( 1,       's'),	);	if ($min_units !== false)	{		if (is_int($min_units) === false)		{			$unit_keys = array_keys($periods);			$key = array_keys($unit_keys, $min_units);			for ($i = $key[0] + 1; $i < 7; $i++)				array_pop($periods);		}	}	foreach ($periods as $units => $data)	{		$count = floor($seconds / $data[0]);		if ($count <= 0)			continue;		$units = ($short_units) ? $data[1] : $units;		$values[$units] = $count;		$seconds = $seconds % $data[0];	}	if (empty($values))		return false;	foreach ($values as $key => $value)	{		if ($short_units === false && $value == 1)			$key = mb_substr($key, 0, -1);		$array[] = $value . ' ' . $key;	}	if (!empty($array))	{		if (is_int($min_units) === true)		{			$count = count($array);			if ($min_units > $count)				$min_units = $count;			for ($i = 0; $i < $min_units; $i++)				$temp[] = $array[$i];			$array = $temp;		}		return implode(', ', $array);	}	return false;}/** * getVar() * * Retrieves the given variable from $_GET if it exists */function getVar($var, $default = false){	return (array_key_exists($var, $_GET)) ? trim($_GET[$var]) : $default;}/** * postVar() * * Retrieves the given variable from $_POST if it exists */function postVar($var, $default = false){	return (array_key_exists($var, $_POST)) ? trim($_POST[$var]) : $default;}/** * cookieVar() * * Retrieves the given variable from $_COOKIE if it exists */function cookieVar($var, $default = false){	return (array_key_exists($var, $_COOKIE)) ? trim($_COOKIE[$var]) : $default;}/** * real_wordwrap() * * Wraps words, but doesn't break tags */function real_wordwrap($str, $cols, $cut){	$len = mb_strlen($str);	$tag = 0;	$wordlen = 0;	$result  = '';	for ($i = 0; $i < $len; $i++)	{		$chr = mb_substr($str, $i, 1);		if ($chr == '<')			$tag++;		elseif ($chr == '>')			$tag--;		elseif (!$tag && $chr == ' ')			$wordlen = 0;		elseif (!$tag)			$wordlen++;		if (!$tag && $wordlen > 0 && !($wordlen%$cols))			$chr .= $cut;		$result .= $chr;	}	return $result;}/** * str_shorten() * * Chops a string into chunks and pastes the first and last * together with an ellipsis */function str_shorten($str, $len){	$separator = '~|~';	$chunk = explode($separator,		mb_substr(chunk_split($str, $len, $separator), 0, -3));	return $chunk[0]. '...' . $chunk[count($chunk) -1];}// -- Compatibility functions ---------------------------------------/** *  file_put_contents() * *  Included for PHP4 compatability. */if (!function_exists('file_put_contents')){	function file_put_contents($file, $string)	{   		$f = fopen($file, 'w');   		fwrite($f, $string);   		fclose($f);	}}?>