html - how to include php in wordpress footer and call on pages -

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i putting in php code in wordpress footer. example, 

$a = "hi";

and on wordpress page try echo $a; blank , not "hi. there way solve this? p.s usuing wordpress's admin dashboard

any appreciated

thanks

variables not passed between template files (header, footer, etc.). can make global.

global $a;

and echo it. note order : if get_footer(); si called after, can't echo before...


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