How to implement statistical spider access in phpjs

With the continuous development of the Internet, web crawlers exist as a tool for understanding and collecting Internet information, and are used by more and more websites. However, for websites with limited traffic, frequent spider visits are not a good thing. Therefore, the function of PHPJS to count spider visits is very important, so how is it implemented?

First of all, we need to understand how to judge spider access. Normally, crawlers will carry the User-Agent field in the request header, and use the value of User-Agent to determine whether it is a spider access. PHPJS provides the function getallheaders() to obtain request header information. Through this function, the User-Agent field in the request header can be obtained.

Next, we need to record the time and IP address of each spider visit for statistics and analysis. PHPJS provides the function $_SERVER['REMOTE_ADDR'] to obtain the IP address. Through this function, the client's IP address can be obtained. We can store the obtained IP address and current time in the database, and remove duplicates based on the IP address to count spider visits. In actual use, in order to avoid storing too much data, old data needs to be cleaned regularly.

In addition, in order to further reduce the impact of spider visits on the website, we can also combine PHPJS caching technology. When it is determined that this visit is a spider visit, the results can be cached and a longer cache time can be set for the spider visit to reduce the number of spider requests to the server.

In short, the statistical spider access function of PHPJS is very important for website optimization. By recording and analyzing spider visits, we can understand the situation of spider visits, further optimize website content, improve search engine rankings, and bring more traffic to the website. Therefore, the implementation of this function should be fully considered when developing a website.

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