1. A method for detecting a phishing website, comprising: (a) acquiring, by one or more microprocessors, digital information related to a microblog post containing a uniform resource locator (URL) of a website, wherein the digital information related to the microblog post comprises functional features, social networking features and propagation features; (b) analyzing, by the one or more microprocessors, the digital information related to the microblog post to extract features of the microblog post, wherein the extracted features of the microblog post comprise the functional features, the social networking features and the propagation features of the microblog post, wherein the functional features comprise a length of the microblog post and content of the microblog post, wherein the social networking features comprise an identity of a microblog poster, whether real name authentication is passed, an age of the microblog poster, microblog account registration time, a microblog level, a number of microblog posts, a number of followers or fans, information about followers or fans and an activity status; and wherein the propagation features comprise the number of re-posts and comments and features of re-posters and commenters; (c) calculating, by the one or more microprocessors, credibility of the URL of the website contained in the microblog post according to the extracted features of the microblog post; and (d) determining, by the one or more processor, according to the credibility of the URL of the website whether the URL of the website is a URL of a phishing website.