Cacher is the code snippet organizer for pro developers

//处理时间的函数
 
function getTime($btime, $etime){

	if ($btime < $etime) {
		$stime = $btime;
		$endtime = $etime;
	}else {
		$stime = $etime;
		$endtime = $btime;
	}
	$timec = $endtime - $stime;
	$days = intval($timec / 86400);
	$rtime = $timec % 86400;
	$hours = intval($rtime / 3600);
	$rtime = $rtime % 3600;
	$mins = intval($rtime / 60);
	$secs = $rtime % 60;
	if($days>=1){
		return $days.' 天前';
	}
	if($hours>=1){
		return $hours.' 小时前';
	}

	if($mins>=1){
		return $mins.' 分钟前';
	}
	if($secs>=1){
		return $secs.' 秒前';
	}
 
}

//获取用户IP
 
function getIp(){
	if(getenv('HTTP_CLIENT_IP') && strcasecmp(getenv('HTTP_CLIENT_IP'), 'unknown')){
		$PHP_IP = getenv('HTTP_CLIENT_IP');
	}elseif(getenv('HTTP_X_FORWARDED_FOR') && strcasecmp(getenv('HTTP_X_FORWARDED_FOR'), 'unknown')){
		$PHP_IP = getenv('HTTP_X_FORWARDED_FOR');
	}elseif(getenv('REMOTE_ADDR') && strcasecmp(getenv('REMOTE_ADDR'), 'unknown')){
		$PHP_IP = getenv('REMOTE_ADDR');
	}elseif(isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], 'unknown')){
		$PHP_IP = $_SERVER['REMOTE_ADDR'];
	}
	preg_match("/[\d\.]{7,15}/", $PHP_IP, $ipmatches);
	$PHP_IP = $ipmatches[0] ? $ipmatches[0] : 'unknown';
	return $PHP_IP;
}

//纯文本输入
function t($text){
	$text=preg_replace('/\[.*?\]/is','',$text); 
	$text = cleanJs ( $text );
	//彻底过滤空格BY QINIAO
	$text = preg_replace('/\s(?=\s)/', '', $text);
	$text = preg_replace('/[\n\r\t]/', ' ', $text);
	$text = str_replace ( '  ', ' ', $text );
	$text = str_replace ( ' ', '', $text );
	$text = str_replace ( '&nbsp;', '', $text );
	$text = str_replace ( '&', '', $text );
	$text = str_replace ( '=', '', $text );
	$text = str_replace ( '-', '', $text );
	$text = str_replace ( '#', '', $text );
	$text = str_replace ( '%', '', $text );
	$text = str_replace ( '!', '', $text );
	$text = str_replace ( '@', '', $text );
	$text = str_replace ( '^', '', $text );
	$text = str_replace ( '*', '', $text );
	$text = str_replace ( 'amp;', '', $text );
	$text = str_replace ( 'position', '', $text );
	
	$text = strip_tags ( $text );
	$text = htmlspecialchars ( $text );
	$text = str_replace ( "'", "", $text );
	return $text;
}

//输入安全的html，针对存入数据库中的数据进行的过滤和转义
 
function h($text){
	$text = trim ( $text );
	$text = htmlspecialchars ( $text );
	$text = addslashes ( $text );
	return $text;
}

//utf-8截取
function cututf8($string, $start = 0,$sublen,$append=true){
	$pa = "/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|\xe0[\xa0-\xbf][\x80-\xbf]|[\xe1-\xef][\x80-\xbf][\x80-\xbf]|\xf0[\x90-\xbf][\x80-\xbf][\x80-\xbf]|[\xf1-\xf7][\x80-\xbf][\x80-\xbf][\x80-\xbf]/";
	preg_match_all($pa, $string, $t_string);
	if(count($t_string[0]) - $start > $sublen && $append==true){
		return join('', array_slice($t_string[0], $start, $sublen))."...";
	}else{
		return join('', array_slice($t_string[0], $start, $sublen));
	}
}