use of "?" operator instead of "if"

[Ravi Malghan]

Hi: I have this statement which checks for existence
of the $VAL variable and performs certain actions

if($VAL){
  $VAL = "$VAL:$expr"; }
else { 
  $VAL = "$expr"; }

Can this 4 line statement be reduced to a single line
using "?" operator?

Thanks
Ravi

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