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<?php function a() { echo "a\n"; return true; } function b() { echo "b\n"; return false; } echo b() or a();
based on hrQlh
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = 5, Position 2 = 8
Branch analysis from position: 5
Jump found. Position 1 = -2
Branch analysis from position: 8
filename:       /in/Paod8
function name:  (null)
number of ops:  10
compiled vars:  none
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   NOP                                                      
   8     1        NOP                                                      
  13     2        INIT_FCALL                                               'b'
         3        DO_FCALL                                      0  $0      
         4      > JMPNZ_EX                                         ~1      $0, ->8
         5    >   INIT_FCALL                                               'a'
         6        DO_FCALL                                      0  $2      
         7        BOOL                                             ~1      $2
         8    >   ECHO                                                     ~1
         9      > RETURN                                                   1

Function a:
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /in/Paod8
function name:  a
number of ops:  3
compiled vars:  none
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   4     0  E >   ECHO                                                     'a%0A'
   5     1      > RETURN                                                   <true>
   6     2*     > RETURN                                                   null

End of function a

Function b:
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /in/Paod8
function name:  b
number of ops:  3
compiled vars:  none
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   9     0  E >   ECHO                                                     'b%0A'
  10     1      > RETURN                                                   <false>
  11     2*     > RETURN                                                   null

End of function b

Generated using Vulcan Logic Dumper, using php 7.3.0