help me to scrape google serp

Hi, can you please help me to get a good way to scrape google results using, php? I can scrape it using this language, but the problem is, Google detect many queries and block my IP. so Im looking a good way to solve this problem.

Here are two ideas that instantly come to my mind :

- Put some delay between queries
or
- Use proxies (if you scrape SERPs with php, you're probably using curl, so it won't be much of a hassle to implement proxy support in your code)