PHP variable value from string -

how can value variable string ?

$member_student        = 3600; $selecteditem = "member_student"; $price = "$" . $selecteditem; print_r($price); //prints $member_student instead of 3600 

i cannot use eval function.

use curly braces denote variable:

$member_student        = 3600; $selecteditem = "member_student"; $price = ${$selecteditem}; print_r($price); // prints 3600