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<?php call_user_func(function($value) { echo (int)$value == 1 ? true : false; }, '1');
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/HXc7C
function name:  (null)
number of ops:  5
compiled vars:  none
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   2     0  E >   DECLARE_LAMBDA_FUNCTION                                  '%00%7Bclosure%7D%2Fin%2FHXc7C0x7f3cd738404e'
         1        INIT_USER_CALL                                1          'call_user_func', ~0
         2        SEND_USER                                                '1'
         3        DO_FCALL                                      0          
         4      > RETURN                                                   1

Function %00%7Bclosure%7D%2Fin%2FHXc7C0x7f3cd738404e:
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 4, Position 2 = 6
Branch analysis from position: 4
1 jumps found. (Code = 42) Position 1 = 7
Branch analysis from position: 7
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 6
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/HXc7C
function name:  {closure}
number of ops:  9
compiled vars:  !0 = $value
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
         0  E >   RECV                                             !0      
         1        CAST                                          4  ~1      !0
         2        IS_EQUAL                                         ~2      ~1, 1
         3      > JMPZ                                                     ~2, ->6
         4    >   QM_ASSIGN                                        ~3      <true>
         5      > JMP                                                      ->7
         6    >   QM_ASSIGN                                        ~3      <false>
         7    >   ECHO                                                     ~3
         8      > RETURN                                                   null

End of function %00%7Bclosure%7D%2Fin%2FHXc7C0x7f3cd738404e

Generated using Vulcan Logic Dumper, using php 7.3.0