Title: calling global variables into a function in header.php Last modified: August 18, 2016 --- # calling global variables into a function in header.php * [budoink](https://wordpress.org/support/users/budoink/) * (@budoink) * [20 years, 5 months ago](https://wordpress.org/support/topic/calling-global-variables-into-a-function-in-headerphp/) * I was having trouble trying to call global variables into a function I’ve put in my modified header, so I tried using a simple function in the default header. php and I’m still having the same problem that the global variables just don’t seem to work in the funtion: * ` * When in an empty php page this function outputs $b=3, but in header.php $b=2. * Does anyone know why? Any help would be greatly appreciated. Viewing 4 replies - 1 through 4 (of 4 total) * [schestowitz](https://wordpress.org/support/users/schestowitz/) * (@schestowitz) * [20 years, 5 months ago](https://wordpress.org/support/topic/calling-global-variables-into-a-function-in-headerphp/#post-301130) * I am not sure what you are trying to achieve (a test/exercise?), but make sure $a and $b are not *already* defined somewhere in header.php . There might be a variable name collision and overriding it can cause all sorts of oddities. That’d be my guess. * Thread Starter [budoink](https://wordpress.org/support/users/budoink/) * (@budoink) * [20 years, 5 months ago](https://wordpress.org/support/topic/calling-global-variables-into-a-function-in-headerphp/#post-301436) * Thanks for the reply schestowitz. No the actual function i was trying to use was * ` $tab_title"; } ?> * $current_tab works fine outside of the function – if i try and echo $current_tab within the function as the link text for instance, nothing is printed so it’s like it just hasn’t passed into the function, if i echo it in the body tags however it prints fine – so i don’t think its a variable collision, unless i’m misunderstanding what you mean by that. * My understanding of php isn’t fantastic, so i tired to use a much simpler function for testing purposes just so I could be sure it wasn’t get_tab() . * Thanks for your suggestion though, any more ideas? …pretty please * Thread Starter [budoink](https://wordpress.org/support/users/budoink/) * (@budoink) * [20 years, 4 months ago](https://wordpress.org/support/topic/calling-global-variables-into-a-function-in-headerphp/#post-301667) * I know bumps are annoying, but does anyone have any ideas whatsoever? Im still stumped 🙁 * Thankyou in advance * Thread Starter [budoink](https://wordpress.org/support/users/budoink/) * (@budoink) * [20 years, 4 months ago](https://wordpress.org/support/topic/calling-global-variables-into-a-function-in-headerphp/#post-301669) * In case anyone else has this problem, the only work around i could think of was to pass the global variable into the function when calling the function ie: * ` $tab_title"; } ?> * This probably isn’t very good coding, but it does work. Viewing 4 replies - 1 through 4 (of 4 total) The topic ‘calling global variables into a function in header.php’ is closed to new replies. ## Tags * [call](https://wordpress.org/support/topic-tag/call/) * [calling](https://wordpress.org/support/topic-tag/calling/) * [function](https://wordpress.org/support/topic-tag/function/) * [global](https://wordpress.org/support/topic-tag/global/) * [php](https://wordpress.org/support/topic-tag/php/) * [variables](https://wordpress.org/support/topic-tag/variables/) * In: [Everything else WordPress](https://wordpress.org/support/forum/miscellaneous/) * 4 replies * 2 participants * Last reply from: [budoink](https://wordpress.org/support/users/budoink/) * Last activity: [20 years, 4 months ago](https://wordpress.org/support/topic/calling-global-variables-into-a-function-in-headerphp/#post-301669) * Status: not resolved ## Topics ### Topics with no replies ### Non-support topics ### Resolved topics ### Unresolved topics ### All topics