谷歌允许从指定的IP或网站查询多少个查询？

I have made a PHP script that counts the no. of back-links from Google of a given website. But my dilemma is how many queries can I perform(as Google has a limit to that)? kindly answer my question and give some solution as soon as possible.

This depends on the speed of requests... you can send thousands of queries from a single ip but you need to do this like a human (slow), not like a bot which sends 20 or so queries every second.

I have done a similar script for myself and the only solution for this are:

• use the google search api, which will costs you something.

or

• scrape google like you did but use proxies. (which will also cost you something, i don't recommend free proxies because they are slow and can change the content)

or

• use a captcha solving service to automatically unblock the google captcha.