spider duo

PHP/** * to determine if search engine spider * * @access public * @return String*/functionIs_spider ($record=true){ Static $spider=NULL; if($spider!==NULL) { return $spider; } if(Empty($_server[' Http_user_agent '])) { $spider= ' '; return‘‘; }

1. The code must be simplified.As we all know, spider crawls the source code of the webpage, which is different from what we see in our eyes. If your website is filled with codes that cannot be recognized by spider such as js and iframe, it is like the food in this restaurant is not what you like and it does not suit your taste, so how many times have you gone, will you go back? The answer is No. Therefore,

spiders for the average person may be a more annoying animal, it can make your house is full of nets, accidentally may also network your face. But for our webmaster, spiders are our online money-making parents. Of course, this spider is not the spider, we talked about this spider is a search engine dedicated to crawling the Internet data program. We all know that

Wuhan SEO today wants to talk about search engine spider's working way. Let's talk about the principles of search engines. Search engine is the Web page content on the Internet on its own server, when the user search for a word, the search engine will be on their own server to find relevant content, so that is, only saved on the search engine server pages will be searched. Which Web pages can be saved to the search engine's servers? Only the search engine's web crawler capture the Web pages will

Spider is a very useful program on the Internet. Search engines use spider programs to collect web pages to databases. Enterprises use spider programs to monitor competitor websites and track changes, individual users use the Spider Program to download web pages for offline use. developers use the

How can I accurately determine whether a request is a request sent by a search engine crawler (SPIDER ?, Search engine Crawler Websites are often visited by various crawlers. Some are search engine crawlers, and some are not. Generally, these crawlers have UserAgent, and we know that UserAgent can be disguised, userAgent is essentially an option setting in the Http request header. You can set any UserAgent for the request by programming. Therefore, us

We can judge whether it is a spider by http_user_agent, the spider of search engine has its own unique symbol, the following list takes part. functionIs_crawler () {$userAgent=Strtolower($_server[' Http_user_agent ']); $spiders=Array( ' Googlebot ',//Google crawler' Baiduspider ',//Baidu Crawler' Yahoo! slurp ',//Yahoo crawler' Yodaobot ',//Youdao crawler' MSNBot '//Bing Crawler//More crawler keyword

Spider is a very useful program on the Internet. Search engines use Spider programs to collect Web pages to databases. Enterprises use Spider programs to monitor competitor websites and track changes, individual users use the Spider Program to download Web pages for offline use. developers use the

Spider is a useful tool on the Internet. Program The search engine uses the Spider Program to collect web pages to the database. enterprises use the Spider Program to monitor competitor websites and track changes. Individual users use the Spider Program to download web pages for offline use, the developer uses the

The major SEO search engine spiders will continue to visit our site to crawl the content, will also consume a certain amount of site traffic, sometimes need to screen some spiders to visit our site. In fact, the commonly used search engine is so few, as long as in the robots file in a few commonly used search engine spiders release, all the other through the wildcard (*) prohibited. A fixed Baidu search engine spider name, but the results let Hugh is

Spider is a very useful program on the Internet. Search engines use spider programs to collect web pages to databases. Enterprises use spider programs to monitor competitor websites and track changes, individual users use the Spider Program to download web pages for offline use. developers use the

Source: Unknown .. Spider is a very useful program on the Internet. Search engines use spider programs to collect web pages to databases. Enterprises use spider programs to monitor competitor websites and track changes, individual users use the Spider Program to download web pages for offline use. developers use the

Today, I will share with you about the search engine spider. We all know that all the pages on the Internet are crawled by Spider. In fact, spider is a code program. When a new page is generated on the Internet, the spider will crawl. Because the Internet generates hundreds of billions of pages every day, a single