PHP Code:
Fibo1[n_] := If[== || == 2
                      Return[
1]
                  ,
                      Return[
Fibo1[1] + Fibo1[2]];
              ]; 
PHP Code:
Fibo2[n_] := Module[{},
                  If[
== || == 2
                          Return[
1]
                      ,
                          Return[
Fibo2[1] + Fibo2[2]];
                      ];
              ]; 
PHP Code:
Fibo3[n_] := Block[{},
                  If[
== || == 2
                          Return[
1]
                      ,
                          Return[
Fibo3[1] + Fibo3[2]];
                      ];
              ];