[Plugin: Mobile Client Detection Plugin] Fix for usage device recognition funcs

Currently the is_desktop(), is_mobile() and is_tablet() are defined from the query_vars that are set in this plugin. When you want to use these functions before the initiation of WP_Query they return false, because the query_vars aren’t set yet. I suggest to change the functions (bottom of mobile_client_detection.php) as follows, from

function is_desktop(){return((get_query_var('platform')=='desktop')? true : false);}
function is_mobile(){return((get_query_var('platform')=='mobile')? true : false);}
function is_tablet(){return((get_query_var('platform')=='tablet')? true : false);}

to

function is_desktop(){return((mcd_get_platform()=='desktop')? true : false);}
function is_mobile(){return((mcd_get_platform()=='mobile')? true : false);}
function is_tablet(){return((mcd_get_platform()=='tablet')? true : false);}

where I use the mcd_get_platform function, called in this plugin to read the $_SERVER[‘HTTP_USER_AGENT’] variable.

Using these changes, you’re able to use these functions in, for example, the wp_enqueue_scripts hook that’s used in the wp_head() to set device specific scripts.

https://www.ads-software.com/extend/plugins/mobile-client-detection-plugin/