XF 1.2 Show variable , data debug in xenforo 1.24

#1
In old version xenforo exam : 1.2 id use var_dump , print_r o show $ in xenforo .

But when I update 1.24 . not show var_dump $variable .
I need print $variable in xenforo 1.24 . How can i do ? now i can't print_r in function xenforo ?
 
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