userfunc condition for detecting mobile device - typo3

Question

Since TYPO3 7 the condition 'device' and 'useragent' are deprecated. No I'm looking for a userFunc to use as a condition for detecting mobile devices. My aim is to hide or to show some special pages on mobile devices.
I used the extension 'contexts_wurfl' for a while but I guess that there should be 'smaller solutions'.
Thanks for any help.

Answer 1

You can accomplish this with TypoScript using the PAGE Object.
The code below shows you how to execute your own code before executing something else (like the template engine/content rendering etcetera).
page.01 = USER_INT
page.01 {
userFunc = TYPO3\MyExt\Utility\MobileDeviceUtility->detectMobileDevice
}
And in code:
<?php
namespace TYPO3\MyExt\Utility;
class MobileDeviceUtility {
/**
* Is Mobile Device
*
* #return boolean
*/
static public function isMobileDevice() {
// calculates if the user agent is on a mobile device
return TRUE;
}
/**
* Detect Mobile Device
*
* #param string $content
* #param array $conf
* #return void
*/
static public function detectMobileDevice($content, array $conf = NULL) {
global $TSFE;
if (self::isMobileDevice()
&& (boolean) $TSFE->page['mycustom_device_checkbox']
) {
// do something
}
}
}
OR otherwise you should create your own condition [YourVendor\YourPackage\YourCondition = var1 = value1, var2 != value2, ...].

Answer 2

If you would like to avoid writing a custom user function the globalString function of Typo3 can still be used in the later versions of Typo3 to access the useragent and other information like this:
[globalString = IENV:HTTP_USER_AGENT = *<User-Agent>*]
# Statements here will only affect browsers with the useragent matching <User-Agent>
[else]
# Statements here will only affect browsers with the useragent not matching <User-Agent>
[end]
Detailed documentation for conditions using globalStringcan be found here.
A Full list of variables that can be used with the globalString function can be found here.
To execute different typoscript for mobile and stationary devices I found the following snippet to be working for Typo3 8.7 LTS and 9.5 LTS:
[globalString = IENV:HTTP_USER_AGENT = *Android*]||[globalString = IENV:HTTP_USER_AGENT = *iPhone*]||[globalString = IENV:HTTP_USER_AGENT = *Mobile*]||[globalString = IENV:HTTP_USER_AGENT = *Windows Phone*]
# Statements for mobile devices only
[else]
# Statements for stationary devices only
[end]