Php obtains the browser name version instance program

You can directly use HTTP_USER_AGENT to obtain the browser version in php, but you need to determine which version is the browser. the instance code is as follows: functionget_user_ B... you can directly use HTTP_USER_AGENT to obtain the browser version in php. However, you need to determine the version of the browser. the instance code is as follows:

function get_user_browser() {    if (empty($_SERVER['HTTP_USER_AGENT'])) {        return '';    }    $agent = $_SERVER['HTTP_USER_AGENT'];    $browser = '';    $browser_ver = '';    if (preg_match('/MSIE\s([^\s|;]+)/i', $agent, $regs)) {        $browser = 'Internet Explorer';        $browser_ver = $regs[1];    } elseif (preg_match('/FireFox\/([^\s]+)/i', $agent, $regs)) {        $browser = 'FireFox';        $browser_ver = $regs[1];    } elseif (preg_match('/Maxthon/i', $agent, $regs)) {        $browser = '(Internet Explorer ' . $browser_ver . ') Maxthon';        $browser_ver = '';    } elseif (preg_match('/Opera[\s|\/]([^\s]+)/i', $agent, $regs)) {        $browser = 'Opera';        $browser_ver = $regs[1];    } elseif (preg_match('/OmniWeb\/(v*)([^\s|;]+)/i', $agent, $regs)) {        $browser = 'OmniWeb';        $browser_ver = $regs[2];    } elseif (preg_match('/Netscape([\d]*)\/([^\s]+)/i', $agent, $regs)) {        $browser = 'Netscape';        $browser_ver = $regs[2];    } elseif (preg_match('/Chrome\/([\d.]+)/i', $agent, $regs)) {        $browser = 'Chrome';        $browser_ver = $regs[1];    } elseif (preg_match('/safari\/([^\s]+)/i', $agent, $regs)) {        $browser = 'Safari';        $browser_ver = $regs[1];    } elseif (preg_match('/NetCaptors([^\s|;]+)/i', $agent, $regs)) {        $browser = '(Internet Explorer ' . $browser_ver . ') NetCaptor';        $browser_ver = $regs[1];    } elseif (preg_match('/Lynx\/([^\s]+)/i', $agent, $regs)) {        $browser = 'Lynx';        $browser_ver = $regs[1];    }    if (!empty($browser)) {        return addslashes($browser . ' ' . $browser_ver);    } else {        return 'Unknow browser';    }}

Note: chrome uses some webkit code, which is developed by Apple. Therefore, chrome recognition must be placed before safari.

Determine if it is a spider:

Function is_spider ($ record = true) // judge whether it is a spider {static $ spider = NULL; if ($ spider! = NULL) {return $ spider; //} if (empty ($ _ SERVER ['http _ USER_AGENT ']) {$ spider = ''; return '';} $ searchengine_bot = array ('googlebot ', 'mediapartners-google', 'baidu', 'msnbot ', 'yodaobot', 'Yahoo! Slurp; ', 'Yahoo! Slurp china; ', 'iaskspider', 'sogou web spider ', 'sogou push spider' 'haosou'); $ searchengine_name = array ('Google ', 'Google adsen ', 'baidu', 'MSN ', 'Yoda', 'Yahoo', 'Yahoo China', 'iask ', 'sogou', 'sogou' haosou '); $ spider = strtolower ($ _ SERVER ['http _ USER_AGENT ']); // Convert the user's browser information to lowercase foreach ($ searchengine_bot AS $ key => $ value) {if (strpos ($ spider, $ value )! = False) // It is definitely not equal to the value. avoid the case where the string is 0 until it appears {$ spider = $ searchengine_name [$ key]; // return the corresponding seo/seo.html "target =" _ blank "> Search Engine Name return $ spider ;}$ spider =''; return '';}

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