nofollow的链接方式
[ 
2008/08/23 16:02 | by wxxslt ]
2008/08/23 16:02 | by wxxslt ]
通常Nofollow的写法有以下两种：
1.在meta中定义，如果在meta中定义Nofollow的话，则搜索引擎不会跟踪该页面的所有链接。语法为
表示禁止抓取本页，同时禁止跟踪本页中的链接。
还有其他的写法：
a).index,follow：允许抓取本页，允许跟踪链接。
b).index,nofollow：允许抓取本页，但禁止跟踪链接。
c).noindex,follow：禁止抓取本页，但允许跟踪链接。
d).noindex,nofllow：禁止抓取本页，同时禁止跟踪本页中的链接。
2.在链接中定义nofollow，写法为：
如果这样写的话，搜索引擎遇到这个外链的时候，则不会往下跟踪下去。所以，对于nofollow的链接方式，google是不会传递PR的，对于nofollow的链接方式，对于站长来说没有任何意义，所以大家在交换友情链接的时候，一定要注意对方是否以nofollow的方式链接你的站。
1.在meta中定义，如果在meta中定义Nofollow的话，则搜索引擎不会跟踪该页面的所有链接。语法为
<meta name="robots" content="noindex,nofollow" />
表示禁止抓取本页，同时禁止跟踪本页中的链接。
还有其他的写法：
a).index,follow：允许抓取本页，允许跟踪链接。
b).index,nofollow：允许抓取本页，但禁止跟踪链接。
c).noindex,follow：禁止抓取本页，但允许跟踪链接。
d).noindex,nofllow：禁止抓取本页，同时禁止跟踪本页中的链接。
2.在链接中定义nofollow，写法为：
<a href="#" rel="nofollow">文学吧</a>
如果这样写的话，搜索引擎遇到这个外链的时候，则不会往下跟踪下去。所以，对于nofollow的链接方式，google是不会传递PR的，对于nofollow的链接方式，对于站长来说没有任何意义，所以大家在交换友情链接的时候，一定要注意对方是否以nofollow的方式链接你的站。
新做的，很好，很强大。
[ 2008/08/23 10:07 | by wxxslt ]
2008/08/23 10:07 | by wxxslt ]
A、B、C三类IP地址分类
[ 2008/08/14 17:12 | by wxxslt ]
2008/08/14 17:12 | by wxxslt ]
A类公网:1.0.0.0 至126.255.255.255 默认的子网掩码是：255.0.0.0
B类公网:128.0.0.0 至191.255.255.255 默认的子网掩码是：255.255.0.0
C类公网:192.0.0.0 至223.255.255.255 默认的子网掩码是：255.255.255.0
A类私网:10.0.0.0 至10.255.255.255 默认的子网掩码是：255.0.0.0
B类私网:172.16.0.0 至172.31.255.255 默认的子网掩码是：255.255.0.0
C类私网:192.168.0.0 至192.168.255.255 默认的子网掩码是：255.255.255.0
记录下，容易忘。
B类公网:128.0.0.0 至191.255.255.255 默认的子网掩码是：255.255.0.0
C类公网:192.0.0.0 至223.255.255.255 默认的子网掩码是：255.255.255.0
A类私网:10.0.0.0 至10.255.255.255 默认的子网掩码是：255.0.0.0
B类私网:172.16.0.0 至172.31.255.255 默认的子网掩码是：255.255.0.0
C类私网:192.168.0.0 至192.168.255.255 默认的子网掩码是：255.255.255.0
记录下，容易忘。
根据某人生日计算年龄
[ 2008/07/18 17:49 | by wxxslt ]
2008/07/18 17:49 | by wxxslt ]
以我的生日为例，按照unix时间戳来算是19岁。
QQ空间上的估计也是这么判断的。
<?php
$day=28;
$month=12;
$year=1988;
$bdayunix=mktime(0,0,0,$month,$day,$year);
$nowunix=time();
$ageunix=$nowunix-$bdayunix;
$age=floor($ageunix/(365*24*60*60));
echo "您的年龄是：".$age."岁";
?>
QQ空间上的估计也是这么判断的。
<?php
$day=28;
$month=12;
$year=1988;
$bdayunix=mktime(0,0,0,$month,$day,$year);
$nowunix=time();
$ageunix=$nowunix-$bdayunix;
$age=floor($ageunix/(365*24*60*60));
echo "您的年龄是：".$age."岁";
?>
加入干扰象素：
中文验证码好像不能输出？暂时没有试成功，不知道怎么编写，还有一个问题是如何绘制一个矩形边框？如果矩形边框要为黑色？程序又如何编写？高手跟帖。
<?php
/*
* 文件:code.php
* 作用:验证码生成
*/
$chinesechar = array("a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z", "A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z");
/*
$chinesechar = array("人","出","来","友","学","孝","仁","义","礼","廉","忠","国","中","易","白","者","火 ","土","金","木","雷","风","龙","虎","天","地", "生","晕","菜","鸟","田","三","百","钱","福 ","爱","情","兽","虫","鱼","九","网","新","度","哎","唉","啊","哦","仪","老","少","日","月 ","星");
*/
session_start();
// 设置 content-type
header("Content-type: image/png");
// 创建图片
$im = imagecreatetruecolor(62,20);
// 创建颜色
$fontcolor = imagecolorallocate($im,0,0,0);
$bgcolor=imagecolorallocate($im,200,200,200);
imagefill($im,0,0,$bgcolor);
// 设置文字
for($i=0;$i<4;$i++)
{
$text.=$chinesechar[(array_rand($chinesechar))];
}
$_SESSION['code'] = $text;
// 设置字体
$font = 'cc.ttf';
// 添加文字
imagettftext($im,12,0,3,15,$fontcolor,$font,$text);
srand((double)microtime()*1000000);
for($i=0;$i<200;$i++) //加入干扰象素
{
$randcolor = ImageColorallocate($im,rand(0,255),rand(0,255),rand(0,255));
imagesetpixel($im,rand()%70,rand()%30,$randcolor);
}
// 输出图片
imagepng($im);
imagedestroy($im);
?>
/*
* 文件:code.php
* 作用:验证码生成
*/
$chinesechar = array("a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z", "A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z");
/*
$chinesechar = array("人","出","来","友","学","孝","仁","义","礼","廉","忠","国","中","易","白","者","火 ","土","金","木","雷","风","龙","虎","天","地", "生","晕","菜","鸟","田","三","百","钱","福 ","爱","情","兽","虫","鱼","九","网","新","度","哎","唉","啊","哦","仪","老","少","日","月 ","星");
*/
session_start();
// 设置 content-type
header("Content-type: image/png");
// 创建图片
$im = imagecreatetruecolor(62,20);
// 创建颜色
$fontcolor = imagecolorallocate($im,0,0,0);
$bgcolor=imagecolorallocate($im,200,200,200);
imagefill($im,0,0,$bgcolor);
// 设置文字
for($i=0;$i<4;$i++)
{
$text.=$chinesechar[(array_rand($chinesechar))];
}
$_SESSION['code'] = $text;
// 设置字体
$font = 'cc.ttf';
// 添加文字
imagettftext($im,12,0,3,15,$fontcolor,$font,$text);
srand((double)microtime()*1000000);
for($i=0;$i<200;$i++) //加入干扰象素
{
$randcolor = ImageColorallocate($im,rand(0,255),rand(0,255),rand(0,255));
imagesetpixel($im,rand()%70,rand()%30,$randcolor);
}
// 输出图片
imagepng($im);
imagedestroy($im);
?>
中文验证码好像不能输出？暂时没有试成功，不知道怎么编写，还有一个问题是如何绘制一个矩形边框？如果矩形边框要为黑色？程序又如何编写？高手跟帖。
orderform.html
processorder.php
<?php
$tireqty=$_POST['tireqty'];
$oilqty=$_POST['oilqty'];
$sparkqty=$_POST['sparkqty'];
$address=$_POST['address'];
$document_root=$_SERVER['DOCUMENT_ROOT'];
?>
<html>
<head>
<title>
Bob's Auto Parts-Order Results
</title>
</head>
<body>
<h1>Bob's Auto Parts</h1>
<h2>Order Results</h2>
<?php
$date=date('H:i,jS F');
echo '<p>Order processed at';
echo $date;
echo '</P>';
echo '<P>Your order is as follows:</P>';
$totalqty=0;
$totalqty=$tireqty+$oilqty+$sparkqty;
echo 'Items ordered: '.$totalqty.'<br>';
if($totalqty==0)
{
echo 'You did not order anything on the previous page!<br>';
}
else
{
if($tireqty>0)
echo $tireqty.'tires<br>';
if($oilqty>0)
echo $oilqty.'oil<br>';
if($sparkqty>0)
echo $sparkqty.'spark<br>';
}
$totalamount=0.00;
define('tireprice',100);
define('oilprice',10);
define('sparkprice',4);
$totalamount=$tireqty*tireprice+$oilqty*oilprice+$sparkqty*sparkprice;
$totalamount=number_format($totalamount, 2, '.', ' ');
echo '<p>Total of order is '.$totalamount.'</p>';
echo '<p>Address to ship to is '.$address.'</P>';
$outputstring=$date."\t".$tireqty."tires \t".$oilqty."oil \t".$sparkqty."spark plugs\t\$".$totalamount."\t".$address."\n";
@ $fp=fopen("$document_root/order/data/order.txt",'ab');
if(!$fp)
{
echo '<P><strong>Your order could not be processed at this time.'
.'Please try again later.</strong></P></body></html>';
exit;
}
fwrite($fp,$outputstring,strlen($outputstring));
fclose($fp);
echo '<P>Order Written.</P>';
?>
</body>
</html>
测试页面 http://www.waigua.biz/orde...
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml...
<html xmlns="http://www.w3.org/1999/xht...
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>Bob's basic order form</title>
</head>
<body>
<form action="processorder.php" method="post">
<table>
<tr bgcolor="#CCCCCC">
<td width="150">Item</td>
<td width="15">Quantity</td>
</tr>
<tr>
<td>Tires</td>
<td align="center"><input type="text" name="tireqty" size="3" maxlength="3" /></td>
</tr>
<tr>
<td>Oil</td>
<td align="center"><input type="text" name="oilqty" size="3" maxlength="3"/></td>
</tr>
<tr>
<td>Spark Plugs</td>
<td align="center"><input type="text" name="sparkqty" size="3"
maxlength="3"/></td>
</tr>
<tr>
<td>Address</td>
<td align="center"><input type="text" name="address" size="20" ></td>
</tr>
<tr>
<td colspan="2" align="center"><input type="submit" value="提交"/></td>
</tr>
</table>
</form>
</body>
</html>
<html xmlns="http://www.w3.org/1999/xht...
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>Bob's basic order form</title>
</head>
<body>
<form action="processorder.php" method="post">
<table>
<tr bgcolor="#CCCCCC">
<td width="150">Item</td>
<td width="15">Quantity</td>
</tr>
<tr>
<td>Tires</td>
<td align="center"><input type="text" name="tireqty" size="3" maxlength="3" /></td>
</tr>
<tr>
<td>Oil</td>
<td align="center"><input type="text" name="oilqty" size="3" maxlength="3"/></td>
</tr>
<tr>
<td>Spark Plugs</td>
<td align="center"><input type="text" name="sparkqty" size="3"
maxlength="3"/></td>
</tr>
<tr>
<td>Address</td>
<td align="center"><input type="text" name="address" size="20" ></td>
</tr>
<tr>
<td colspan="2" align="center"><input type="submit" value="提交"/></td>
</tr>
</table>
</form>
</body>
</html>
processorder.php
<?php
$tireqty=$_POST['tireqty'];
$oilqty=$_POST['oilqty'];
$sparkqty=$_POST['sparkqty'];
$address=$_POST['address'];
$document_root=$_SERVER['DOCUMENT_ROOT'];
?>
<html>
<head>
<title>
Bob's Auto Parts-Order Results
</title>
</head>
<body>
<h1>Bob's Auto Parts</h1>
<h2>Order Results</h2>
<?php
$date=date('H:i,jS F');
echo '<p>Order processed at';
echo $date;
echo '</P>';
echo '<P>Your order is as follows:</P>';
$totalqty=0;
$totalqty=$tireqty+$oilqty+$sparkqty;
echo 'Items ordered: '.$totalqty.'<br>';
if($totalqty==0)
{
echo 'You did not order anything on the previous page!<br>';
}
else
{
if($tireqty>0)
echo $tireqty.'tires<br>';
if($oilqty>0)
echo $oilqty.'oil<br>';
if($sparkqty>0)
echo $sparkqty.'spark<br>';
}
$totalamount=0.00;
define('tireprice',100);
define('oilprice',10);
define('sparkprice',4);
$totalamount=$tireqty*tireprice+$oilqty*oilprice+$sparkqty*sparkprice;
$totalamount=number_format($totalamount, 2, '.', ' ');
echo '<p>Total of order is '.$totalamount.'</p>';
echo '<p>Address to ship to is '.$address.'</P>';
$outputstring=$date."\t".$tireqty."tires \t".$oilqty."oil \t".$sparkqty."spark plugs\t\$".$totalamount."\t".$address."\n";
@ $fp=fopen("$document_root/order/data/order.txt",'ab');
if(!$fp)
{
echo '<P><strong>Your order could not be processed at this time.'
.'Please try again later.</strong></P></body></html>';
exit;
}
fwrite($fp,$outputstring,strlen($outputstring));
fclose($fp);
echo '<P>Order Written.</P>';
?>
</body>
</html>
测试页面 http://www.waigua.biz/orde...
dl、dt、dd标签
[ 2007/08/26 09:33 | by wxxslt ]
2007/08/26 09:33 | by wxxslt ]
看一下下边的例子您就会明白了：
例2 创建一个普通列表
此例在浏览器中的显示如下:
中国城市
北京
上海
广州
美国城市
华盛顿
芝加哥
纽约
例2 创建一个普通列表
<html>
<head>
<title>一个普通列表</title>
</head>
<body text="blue">
<dl>
<dt>中国城市</dt>
<dd>北京 </dd>
<dd>上海 </dd>
<dd>广州 </dd>
<dt>美国城市</dt>
<dd>华盛顿 </dd>
<dd>芝加哥 </dd>
<dd>纽约 </dd>
</dl>
</body>
</html>
<head>
<title>一个普通列表</title>
</head>
<body text="blue">
<dl>
<dt>中国城市</dt>
<dd>北京 </dd>
<dd>上海 </dd>
<dd>广州 </dd>
<dt>美国城市</dt>
<dd>华盛顿 </dd>
<dd>芝加哥 </dd>
<dd>纽约 </dd>
</dl>
</body>
</html>
此例在浏览器中的显示如下:
中国城市
北京
上海
广州
美国城市
华盛顿
芝加哥
纽约
