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<?php function fact($i) { if ($i === 5) { // our base case return '$i is 5'; } else { return fact($i-1); // <--calling itself. } } $i = 30; echo fact($i);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ZhZG3
function name:  (null)
number of ops:  6
compiled vars:  !0 = $i
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   12     0  E >   ASSIGN                                                   !0, 30
   13     1        INIT_FCALL                                               'fact'
          2        SEND_VAR                                                 !0
          3        DO_FCALL                                      0  $2      
          4        ECHO                                                     $2
          5      > RETURN                                                   1

Function fact:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 3, Position 2 = 5
Branch analysis from position: 3
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 5
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ZhZG3
function name:  fact
number of ops:  11
compiled vars:  !0 = $i
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   RECV                                             !0      
    3     1        IS_IDENTICAL                                             !0, 5
          2      > JMPZ                                                     ~1, ->5
    4     3    > > RETURN                                                   '%24i+is+5'
          4*       JMP                                                      ->10
    7     5    >   INIT_FCALL_BY_NAME                                       'fact'
          6        SUB                                              ~2      !0, 1
          7        SEND_VAL_EX                                              ~2
          8        DO_FCALL                                      0  $3      
          9      > RETURN                                                   $3
    9    10*     > RETURN                                                   null

End of function fact

Generated using Vulcan Logic Dumper, using php 8.0.0


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