php源码显ip图片显IP图片签名分析

//创建画布
$img = imagecreatefrompng('bg.png');
//设置颜色
$blue = imagecolorallocate($img,0,0,200);
$red = imagecolorallocate($img,255,0,0);
$black = imagecolorallocate($img,0,0,0);
//输出文字
imagettftext($img, 12, 0, 10, 20, $red, "simkai.ttf", "IP：".$ip."  来自：".$adress);
imagettftext($img, 12, 0, 10, 40, $red, "simkai.ttf", "你的操作系统为：".$system);
imagettftext($img, 12, 0, 10, 60, $red, "simkai.ttf", "你的浏览器为：".$exp[0].$exp[1]);
imagettftext($img, 12, 0, 10, 80, $red, "simkai.ttf", "今天是：".$date);
imagettftext($img, 12, 0, 30, 100, $blue, "simkai.ttf", "牛牛逼逼叉叉 http://www.nnbbxx.net");
//输出图像
header("Content-type:image/png");
imagepng($img);
//销毁图像
imagedestroy($img);
?>

$_SERVER[‘HTTP_USER_AGENT’]
stripos()
function getSystem(){   
    $sys = $_SERVER['HTTP_USER_AGENT'];   
    if(stripos($sys, "NT 6.1"))
        $os = "Windows 7";   
    elseif(stripos($sys, "NT 6.0"))   
		$os = "Windows Vista";   
    elseif(stripos($sys, "NT 5.1"))   
		$os = "Windows XP";   
    elseif(stripos($sys, "NT 5.2"))   
		$os = "Windows Server 2003";   
    elseif(stripos($sys, "NT 5"))   
		$os = "Windows 2000";   
    elseif(stripos($sys, "NT 4.9"))   
		$os = "Windows ME";   
    elseif(stripos($sys, "NT 4"))   
		$os = "Windows NT 4.0";   
    elseif(stripos($sys, "98"))   
		$os = "Windows 98";   
    elseif(stripos($sys, "95"))   
		$os = "Windows 95";   
    elseif(stripos($sys, "Mac"))   
		$os = "Mac";   
    elseif(stripos($sys, "Linux"))   
		$os = "Linux";   
    elseif(stripos($sys, "Unix"))   
		$os = "Unix";   
    elseif(stripos($sys, "FreeBSD"))   
		$os = "FreeBSD";   
    elseif(stripos($sys, "SunOS"))   
		$os = "SunOS";   
    elseif(stripos($sys, "BeOS"))   
		$os = "BeOS";   
    elseif(stripos($sys, "OS/2"))   
		$os = "OS/2";   
    elseif(stripos($sys, "PC"))   
		$os = "Macintosh";   
    elseif(stripos($sys, "AIX"))   
		$os = "AIX";   
    else  
        $os = "未知操作系统";   
	return $os;   
}  
$system = getSystem();

$_SERVER[‘HTTP_USER_AGENT’]

stripos()

//分析返回用户网页浏览器名称，返回的数组第一个为浏览器名称，第二个是版本号。
function getBrowser() {
     $sys = $_SERVER['HTTP_USER_AGENT'];  //获取用户代理字符串
     if (stripos($sys, "Firefox/") > 0) {
         preg_match("/Firefox/([^;)]+)+/i", $sys, $b);
         $exp[0] = "火狐浏览器";
         $exp[1] = $b[1];  //获取火狐浏览器的版本号
     } elseif (stripos($sys, "Maxthon") > 0) {
         preg_match("/Maxthon/([d.]+)/", $sys, $aoyou);
         $exp[0] = "傲游浏览器";
         $exp[1] = $aoyou[1];
     } elseif (stripos($sys, "MSIE") > 0) {
         preg_match("/MSIEs+([^;)]+)+/i", $sys, $ie);
         //$exp = "Internet Explorer ".$ie[1];
         $exp[0] = "IE浏览器";
         $exp[1] = $ie[1];  //获取IE的版本号
     } elseif (stripos($sys, "OPR") > 0) {
         preg_match("/OPR/([d.]+)/", $sys, $opera);
         $exp[0] = "Opera浏览器";
         $exp[1] = $opera[1];  //获取opera浏览器版本号,今天下载一个opera浏览器做测试，发现opera竟然也换成谷歌的内核了，囧
    }elseif (stripos($sys, "Chrome") > 0 && stripos($sys, "SE") > 0) {
         $exp[0] = "搜狗浏览器";
         $exp[1] = "";  
    }elseif (stripos($sys, "Chrome") > 0) {
         preg_match("/Chrome/([d.]+)/", $sys, $google);
         $exp[0] = "Chrome浏览器";
         $exp[1] = $google[1];  //获取google chrome的版本号
    }else {
         $exp = "未知浏览器";
         $exp[1] = "";    //其余的浏览器大家可以根据输出的$_SERVER['HTTP_USER_AGENT']信息来自行获取浏览器名称和版本号
     }
     return $exp;
 }
 $exp=getBrowser();
 $browser=$exp[0]

$_SERVER[‘REMOTE_ADDR’];//访问端（有可能是用户，有可能是代理的）IP
$_SERVER[‘HTTP_CLIENT_IP’];//代理端的（有可能存在，可伪造）
$_SERVER[‘HTTP_X_FORWARDED_FOR’];//用户是在哪个IP使用的代理（有可能存在，也可以伪造）

//获取用户IP地址
function getIP(){
    if ($HTTP_SERVER_VARS["HTTP_X_FORWARDED_FOR"]) { 
            $ip = $HTTP_SERVER_VARS["HTTP_X_FORWARDED_FOR"]; 
        }elseif ($HTTP_SERVER_VARS["HTTP_CLIENT_IP"]) { 
            $ip = $HTTP_SERVER_VARS["HTTP_CLIENT_IP"]; 
        }elseif ($HTTP_SERVER_VARS["REMOTE_ADDR"]) { 
            $ip = $HTTP_SERVER_VARS["REMOTE_ADDR"]; 
        }elseif (getenv("HTTP_X_FORWARDED_FOR")) { 
            $ip = getenv("HTTP_X_FORWARDED_FOR"); 
        }elseif (getenv("HTTP_CLIENT_IP")) { 
            $ip = getenv("HTTP_CLIENT_IP"); 
        }elseif (getenv("REMOTE_ADDR")){ 
            $ip = getenv("REMOTE_ADDR"); 
        } else { 
            $ip = "Unknown"; 
        } 
    return $ip;
}
    $ip=getIP();

//获取地区信息
function getAdress($a){
    $url = "http://ip.chinaz.com/?IP=".$a;
    $fp = @fopen($url, "r") or die("超时");
    $fcontents = file_get_contents($url);
    preg_match_all("/==>> d+ ==>> (.*)

/", $fcontents, $regs);
    return $regs[1][0];
}
    $adress = getAdress($ip);