取而代之的是一大段“In your email, please send us the entire code displayed below”之类的Google terms_of_service错误提示信息。看来是原先的接口已经失效了。
但我装在Firefox工具栏的扩展插件SearchStatus仍然能够正常解析出每个受访页的PR值，找到 SearchStatus 的插件包解开来看源码，果然是使用了不一样的验证码生成算法，在原先的 checksum 生成之后，还需要再进行一次计算，两次演算之后得到的才是正确的ch参数。
于是拿现成的js代码改造一番之后，新的PHP版本的 Google PageRank 查询接口方法就出来了。经过本地测试之后，谁想传到服务器之后又出现了该死的 terms_of_service 错误提示。把checksum的计算过程一步步打出来，发现经过了几次右位移之后本地和服务器上的数字就不一样了。这才想到服务器是64位机，32位系统下位移之后应该被cut掉的bit在那里就活得好好的。加了个 trunkbitForce32bit 方法，对所有算术运算之后的数值进行高位屏蔽，算是搞定了64位系统下的多余位问题。结果拿到32位Linux环境下跑又不兼容了，原因是PHP在进行算术处理出现溢出时，会自动尝试将int转为float。当发生的是负数溢出时，这一操作在Windows下能正确保留精度，但在Linux下就有问题了。
下面这段代码：
$a = -4294967295;
echo dechex($a)."<br />\n";
if ( $a < 0 ) $a += 4294967296;
echo dechex($a)."<br />\n";
第一个echo在Windows下能够正确输出该负数低32位的补码，而在32位Linux机上输出的则是int类型所能表示的最大负数0x80000000了。只有通过取巧的方式给这个溢出的大负数加上一个超出整数范围的大整数来抵消掉溢出的部分，才能复原低32位应该有的样子。
使用这些非常规手段，终于炮制出这个更新版的兼容Linux32/Linux64/Windows的Google PR值查询接口的PHP脚本实现（含完整代码）。
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▪Google PR查询接口checksum新算法第1/2页
取而代之的是一大段“In your email, please send us the entire code displayed below”之类的Google terms_of_service错误提示信息。看来是原先的接口已经失效了。 但我装在Firefox工具栏的扩展插件SearchStatus仍.........
▪PHP setcookie() cannot modify header information 的解决方法
使用setcookie()函数时总是报以下错误： Warning: Cannot modify header information - headers already sent by.... 解决办法如下： 方法一： 在PHP里Cookie的使用是有一些限制的。 1、使用setcookie必须在<html>.........
▪据说是雅虎的一份PHP面试题附答案
从网上搜集到的，据说是雅虎的面试题。 1. Which of the following will not add john to the users array? 1. $users[] = 'john'; 2. array_add($users,'john'); //wrong 3. array_push($users,'john'); 4. $users ||= 'john'; //wrong 2. What's t.........
[1]Google PR查询接口checksum新算法第1/2页
来源: 互联网 发布时间: 2013-11-30
[2]PHP setcookie() cannot modify header information 的解决方法
来源: 互联网 发布时间: 2013-11-30
使用setcookie()函数时总是报以下错误：
Warning: Cannot modify header information - headers already sent by....
解决办法如下：
方法一：
在PHP里Cookie的使用是有一些限制的。
1、使用setcookie必须在<html>标签之前
2、使用setcookie之前，不可以使用echo输入内容
3、直到网页被加载完后，cookie才会出现
4、setcookie必须放到任何资料输出浏览器前，才送出
.....
由于上面的限制，在使用setcookie()函数时，学会遇到 "Undefined index"、"Cannot modify header information - headers already sent by"…等问题，解决办法是在输出内容之前，产生cookie，可以在程序的最上方加入函数 ob_start();
ob_start ：打开输出缓冲区
函数格式：void ob_start(void)
说明：当缓冲区激活时，所有来自PHP程序的非文件头信息均不会发送，而是保存在内部缓冲区。为了输出缓冲区的内容，可以使用ob_end_flush()或flush()输出缓冲区的内容。
方法二：
解决Warning: Cannot modify header information - headers already sent by ......
前几天装了个php的大头贴系统测试，发现报错Warning: Cannot modify header information - headers already sent by ......
今天又装openads，还是出现这个问题。怒了。上网找了半天，有人说要在文件开头写上
ob_start();
失败。
后来打开 php.ini 然后把 output_buffering 设为 on 。重起appache，OK。看来这才是解决办法。
特别注意：
如果使用utf-8编码，一定要去掉UTF-8中的BOM，这都是因为utf-8编码文件含有的bom原因，而php4,5都是不支持bom的。去掉bom，可以用Notepad++打开转换一下。
Warning: Cannot modify header information - headers already sent by....
解决办法如下：
方法一：
在PHP里Cookie的使用是有一些限制的。
1、使用setcookie必须在<html>标签之前
2、使用setcookie之前，不可以使用echo输入内容
3、直到网页被加载完后，cookie才会出现
4、setcookie必须放到任何资料输出浏览器前，才送出
.....
由于上面的限制，在使用setcookie()函数时，学会遇到 "Undefined index"、"Cannot modify header information - headers already sent by"…等问题，解决办法是在输出内容之前，产生cookie，可以在程序的最上方加入函数 ob_start();
ob_start ：打开输出缓冲区
函数格式：void ob_start(void)
说明：当缓冲区激活时，所有来自PHP程序的非文件头信息均不会发送，而是保存在内部缓冲区。为了输出缓冲区的内容，可以使用ob_end_flush()或flush()输出缓冲区的内容。
方法二：
解决Warning: Cannot modify header information - headers already sent by ......
前几天装了个php的大头贴系统测试，发现报错Warning: Cannot modify header information - headers already sent by ......
今天又装openads，还是出现这个问题。怒了。上网找了半天，有人说要在文件开头写上
ob_start();
失败。
后来打开 php.ini 然后把 output_buffering 设为 on 。重起appache，OK。看来这才是解决办法。
特别注意：
如果使用utf-8编码，一定要去掉UTF-8中的BOM，这都是因为utf-8编码文件含有的bom原因，而php4,5都是不支持bom的。去掉bom，可以用Notepad++打开转换一下。
[3]据说是雅虎的一份PHP面试题附答案
来源: 互联网 发布时间: 2013-11-30
从网上搜集到的，据说是雅虎的面试题。
1. Which of the following will not add john to the users array?
1. $users[] = 'john';
2. array_add($users,'john'); //wrong
3. array_push($users,'john');
4. $users ||= 'john'; //wrong
2. What's the difference between sort(), asort() and ksort? Under what circumstances would you use each of these?
my an:sort()-排序 asort()-保持key值排序 ksort()-以key顺序排序 rsort()-逆排序 arsort()-保持key值逆排序 krsort()-以key逆顺序排序
3. What would the following code print to the browser? Why?
$num = 10;
function multiply()
{
$num = $num * 10;
}
multiply();
echo $num;
my an:10 because var scope4. What is the difference between a reference and a regular variable? How do you pass by reference & why would you want to?
5. What functions can you use to add library code to the currently running script?
6. What is the difference between foo() & @foo()?
7. How do you debug a PHP application?
8. What does === do? What's an example of something that will give true for ‘==', but not ‘==='?
9. How would you declare a class named “myclass” with no methods or properties?
10. How would you create an object, which is an instance of “myclass”?
11. How do you access and set properties of a class from within the class?
12. What is the difference between include & include_once? include & require?
13. What function would you use to redirect the browser to a new page?
1. redir() 2. header() 3. location() 4. redirect()
my an :2
14. What function can you use to open a file for reading and writing?
1. fget(); 2. file_open(); 3. fopen(); 4. open_file();my an :315. What's the difference between mysql_fetch_row() and mysql_fetch_array()?
16. What does the following code do? Explain what's going on there.
$date='08/26/2003'; print ereg_replace(“([0-9]+)/([0-9]+)/([0-9]+)”,2/1/3,$date);17. Given a line of text $string, how would you write a regular expression to strip all the HTML tags from it?
18. What's the difference between the way PHP and Perl distinguish between arrays and hashes?
19. How can you get round the stateless nature of HTTP using PHP?
20. What does the GD library do?
21. Name a few ways to output (print) a block of HTML code in PHP?
22. Is PHP better than Perl? – Discuss.
1. Which of the following will not add john to the users array?
1. $users[] = 'john';
2. array_add($users,'john'); //wrong
3. array_push($users,'john');
4. $users ||= 'john'; //wrong
2. What's the difference between sort(), asort() and ksort? Under what circumstances would you use each of these?
my an:sort()-排序 asort()-保持key值排序 ksort()-以key顺序排序 rsort()-逆排序 arsort()-保持key值逆排序 krsort()-以key逆顺序排序
3. What would the following code print to the browser? Why?
$num = 10;
function multiply()
{
$num = $num * 10;
}
multiply();
echo $num;
my an:10 because var scope4. What is the difference between a reference and a regular variable? How do you pass by reference & why would you want to?
5. What functions can you use to add library code to the currently running script?
6. What is the difference between foo() & @foo()?
7. How do you debug a PHP application?
8. What does === do? What's an example of something that will give true for ‘==', but not ‘==='?
9. How would you declare a class named “myclass” with no methods or properties?
10. How would you create an object, which is an instance of “myclass”?
11. How do you access and set properties of a class from within the class?
12. What is the difference between include & include_once? include & require?
13. What function would you use to redirect the browser to a new page?
1. redir() 2. header() 3. location() 4. redirect()
my an :2
14. What function can you use to open a file for reading and writing?
1. fget(); 2. file_open(); 3. fopen(); 4. open_file();my an :315. What's the difference between mysql_fetch_row() and mysql_fetch_array()?
16. What does the following code do? Explain what's going on there.
$date='08/26/2003'; print ereg_replace(“([0-9]+)/([0-9]+)/([0-9]+)”,2/1/3,$date);17. Given a line of text $string, how would you write a regular expression to strip all the HTML tags from it?
18. What's the difference between the way PHP and Perl distinguish between arrays and hashes?
19. How can you get round the stateless nature of HTTP using PHP?
20. What does the GD library do?
21. Name a few ways to output (print) a block of HTML code in PHP?
22. Is PHP better than Perl? – Discuss.
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