如何使用php阻止一些http用户代理

Question

there have a way to block some of user agent via php script? Example on mod_security

SecFilterSelective HTTP_USER_AGENT "Agent Name 1"
SecFilterSelective HTTP_USER_AGENT "Agent Name 2"
SecFilterSelective HTTP_USER_AGENT "Agent Name 3"

Also we can block them using htaccess or robots.txt by example but I want in php. Any example code?

Answer 1

I like @Nerdling's answer, but in case it's helpful, if you have a very long list of user agents that need to be blocked:

$badAgents = array('fooAgent','blahAgent', 'etcAgent');
foreach($badAgents as $agent) {
    if(strpos($_SERVER['HTTP_USER_AGENT'],$agent) !== false) {
        die('Go away');
    }
}

Better yet:

$badAgents = array('fooAgent','blahAgent', 'etcAgent');
if(in_array($_SERVER['HTTP_USER_AGENT'],$badAgents)) {
    exit();
}