XF 2.0 Undefined index: HTTP_USER_AGENT

[hemant_bhardwaj]

getting this error in one of my client forum with with HTTP_USER_AGENT but not able to reproduce on my end but

if(preg_match("/(android|avantgo|blackberry|bolt|boost|cricket|docomo|fone|hiptop|mini|mobi|palm|phone|pie|tablet|up\.browser|up\.link|webos|wos)/i", $_SERVER["HTTP_USER_AGENT"])){
      ---- MYcode------
        }else {
      ---- MYcode------
        }

does it related to xenforo or hosting ?

 

[Chris D]

The array $_SERVER in this client's case does not contain a HTTP_USER_AGENT key. Your code needs to protect against that. And that pretty much needs to apply in every single bit of code that you write when you're handling an array which may or may not have the keys you expect. That's a fairly fundamental PHP principle.

 

[hemant_bhardwaj]

Thanks @chrid D ahh agree so it's mean i need to find other way to get this approach to make ti work for every one

 

[hemant_bhardwaj]

@Chris D is there any way in xenforo to detect the device
like is it desktop or mobile ?

 

[HappyWorld]

@Chris D is there any way in xenforo to detect the device
like is it desktop or mobile ?

Because it seems you try to apply mobile detection in PHP code, you can use this

GitHub - serbanghita/Mobile-Detect: Mobile_Detect is a lightweight PHP class for detecting mobile devices (including tablets). It uses the User-Agent string combined with specific HTTP headers to detect the mobile environment.

Mobile_Detect is a lightweight PHP class for detecting mobile devices (including tablets). It uses the User-Agent string combined with specific HTTP headers to detect the mobile environment. - serb...

github.com

It is pretty robust

But if you only want to detect in template, using template system, you can use this add-on.

Unmaintained - Mobile / Browser Detection in Template

Tested with XF 2.1.5. Not tested yet with XF 2.0, but i think it should work. Check FAQ section above. With this addon you can use template syntax in any template like this : You are using mobile ...

xenforo.com