Browser check implemented by PHP

This article mainly introduces the browser check class implemented by PHP, and analyzes in detail the related skills of PHP browser operations based on the instance form, which is very simple and practical, if you need a browser, refer to the example in this article to describe the browser check class implemented by PHP. We will share this with you for your reference. The details are as follows:

<? Php // original author: epsilon7 // SonyMusic ([email] sonymusic@163.net [/email]) class BrowserDetector {var $ UA = ""; // $ HTTP_USER_AGENT content var $ BROWSER = "Unknown"; // BROWSER type var $ PLATFORM = "Unknown"; // operating system var $ VERSION = ""; // browser version var $ MAJORVER = ""; // Main browser version var $ MINORVER = ""; // browser minor version/* constructor start */function BrowserDetector () {$ this-> UA = getenv (HTTP_USER_AGENT); $ preparens = ""; $ parens = ""; $ I = strpos ($ this-> UA ,"("); if ($ I >=0) {$ preparens = trim (substr ($ this-> UA, 0, $ I); $ parens = substr ($ this-> UA, $ I + 1, strlen ($ this-> UA); $ j = strpos ($ parens, ")"); if ($ j> = 0) {$ parens = substr ($ parens, 0, $ j) ;}} else {$ preparens = $ this-> UA ;}$ browVer = $ preparens; $ token = trim (strtok ($ parens, ";"); while ($ token) {if ($ token = "compatible ") {} elseif (preg_match ("/MSIE/I", "$ token") {$ browVer = $ token;} elseif (preg_match ("/Opera/I ", "$ token") {$ browVer = $ token;} elseif (preg_match ("/X11/I", "$ token ") | preg_match ("/SunOS/I", "$ token") | preg_match ("/Linux/I", "$ token ")) {$ this-> PLATFORM = "Unix";} elseif (preg_match ("/Win/I", "$ token") {$ this-> PLATFORM = $ token ;} elseif (preg_match ("/Mac/I", "$ token") | preg_match ("/PPC/I", "$ token ")) {$ this-> PLATFORM = $ token;} $ token = strtok (";") ;}$ msieIndex = strpos ($ browVer, "MSIE "); if ($ msieIndex> = 0) {$ browVer = substr ($ browVer, $ msieIndex, strlen ($ browVer);} $ leftover = ""; if (substr ($ browVer, 0, strlen ("Mozilla") = "Mozilla") {$ this-> BROWSER = "Netscape "; $ leftover = substr ($ browVer, strlen ("Mozilla") + 1, strlen ($ browVer);} elseif (substr ($ browVer, 0, strlen ("Lynx") = "Lynx") {$ this-> BROWSER = "Lynx"; $ leftover = substr ($ browVer, strlen ("Lynx ") + 1, strlen ($ browVer);} elseif (substr ($ browVer, 0, strlen ("MSIE") = "MSIE ") {$ this-> BROWSER = "IE"; $ leftover = substr ($ browVer, strlen ("MSIE") + 1, strlen ($ browVer ));} elseif (substr ($ browVer, 0, strlen ("Microsoft Internet Explorer") = "Microsoft Internet Explorer") {$ this-> BROWSER = "IE "; $ leftover = substr ($ browVer, strlen ("Microsoft Internet Explorer") + 1, strlen ($ browVer);} elseif (substr ($ browVer, 0, strlen ("Opera") = "Opera") {$ this-> BROWSER = "Opera"; $ leftover = substr ($ browVer, strlen ("Opera ") + 1, strlen ($ browVer) ;}$ leftover = trim ($ leftover); $ I = strpos ($ leftover, ""); if ($ I> 0) {$ this-> VERSION = substr ($ leftover, 0, $ I);} else {$ this-> VERSION = $ leftover ;} $ j = strpos ($ this-> VERSION ,". "); if ($ j >=0) {$ this-> MAJORVER = substr ($ this-> VERSION, 0, $ j ); $ this-> MINORVER = substr ($ this-> VERSION, $ j + 1, strlen ($ this-> VERSION ));} else {$ this-> MAJORVER = $ this-> VERSION ;}}// the test program starts $ test = new browserdetector; echo $ test-> UA."
"; Echo $ test-> BROWSER ."
"; Echo $ test-> PLATFORM ."
"; Echo $ test-> VERSION ."
"; Echo $ test-> MAJORVER ."
"; Echo $ test-> MINORVER ."
";?>