Encoded String (enc_str)= dmFyMT0wJnZhcjI9MC4wMDEmdmFyMz1FRg==

dec_str = base64_decode(enc_str)
Decoded String (dec_str)= var1=0&var2=0.001&var3=EF

split = explode(&, dec_str)
Exploded String(/s) = Array:
Xplode 1 (split[0])= var1=0
Xplode 2 (split[1])= var2=0.001
Xplode 3 (split[2])= var3=EF
Xplode 4 (split[3])=
JSON_Encoded (split)= ["var1=0","var2=0.001","var3=EF"]



Success Starts here:
var 1 =
var 2 =
var 3 =

decoded['var2'] = 0.001
0



SUCCESS