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<?php class Test { public function callback() {} } class Test2 { public function set(callable $callback) {} } $callback = 'Test::callback'; var_dump(is_callable($callback)); $a = new Test2(); $a->set($callback); ?>
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ilbYM
function name:  (null)
number of ops:  14
compiled vars:  !0 = $callback, !1 = $a
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   9     0  E >   ASSIGN                                                   !0, 'Test%3A%3Acallback'
  11     1        INIT_FCALL                                               'var_dump'
         2        INIT_FCALL                                               'is_callable'
         3        SEND_VAR                                                 !0
         4        DO_ICALL                                         $3      
         5        SEND_VAR                                                 $3
         6        DO_ICALL                                                 
  13     7        NEW                                              $5      :12
         8        DO_FCALL                                      0          
         9        ASSIGN                                                   !1, $5
  14    10        INIT_METHOD_CALL                                         !1, 'set'
        11        SEND_VAR_EX                                              !0
        12        DO_FCALL                                      0          
  15    13      > RETURN                                                   1

Class Test:
Function callback:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ilbYM
function name:  callback
number of ops:  1
compiled vars:  none
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E > > RETURN                                                   null

End of function callback

End of class Test.

Class Test2:
Function set:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ilbYM
function name:  set
number of ops:  2
compiled vars:  !0 = $callback
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   6     0  E >   RECV                                             !0      
         1      > RETURN                                                   null

End of function set

End of class Test2.

Generated using Vulcan Logic Dumper, using php 8.0.0


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