php实现图形显示Ip地址的代码_PHP教程

("Content-type: image/gif" = imagecreate(130,15 = ImageColorAllocate (, 255, 255, 255((['HTTP_CLIENT_IP'=['HTTP_CLIENT_IP' (['HTTP_X_FORWARDED_FOR'=['HTTP_X_FORWARDED_FOR'=['REMOTE_ADDR'
 = imagecolorallocate(, 0, 51, 102, 3, 5, 1,  , ?>

2. header("Content-type: image/gif");
第二行 声明浏览器标头 输出为GIF图形
3. $im = imagecreate(130,15);
建立一个图形 imagecreate(130,15)括号内130,15分别代表宽度和高度
4. $background_color = ImageColorAllocate ($im, 255, 255, 255);
设置背景颜色 imagecolorallocate 为一幅图片分配颜色 ($im, 255, 255, 255)im代表前面提到的新建图形 后面的3个255则代表颜色表ffffff的10进制字符
5. unset($ip);
无用
6.if($_SERVER['HTTP_CLIENT_IP']){
$ip=$_SERVER['HTTP_CLIENT_IP'];
} else if($_SERVER['HTTP_X_FORWARDED_FOR']){
$ip=$_SERVER['HTTP_X_FORWARDED_FOR'];
} else{
$ip=$_SERVER['REMOTE_ADDR'];
}
如果$_SERVER['HTTP_CLIENT_IP']可以使用则使用$_SERVER['HTTP_CLIENT_IP']下面类似 为判断 此段是为了兼容多种服务器设置
7. $col = imagecolorallocate($im, 0, 51, 102);
定义文字颜色
8. imagestring($im, 3, 5, 1, $ip , $col);
将获取到的IP画到新建的画布上 imagestring($im, 3, 5, 1, $ip , $col); 分别代表imagestring(图形表示,字符尺寸1-5,X坐标,Y坐标,输出的IP,颜色)
9. imagegif($im);
输出GIF图形
10. imagedestroy($im);
释放内存
11. ?>
程序结束

http://www.bkjia.com/PHPjc/714718.htmlwww.bkjia.comtruehttp://www.bkjia.com/PHPjc/714718.htmlTechArticle? ("Content-type: image/gif" = imagecreate(130,15 = ImageColorAllocate ( , 255, 255, 255 ( ( ['HTTP_CLIENT_IP' = ['HTTP_CLIENT_IP' ( ['HTTP_X_FORWARDED_FOR' = ['HTTP_X_FORWARDED_FO...