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<?php function test(Closure $func) { echo call_user_func($func); } test(function () { return 'test1234'; });
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/W7RCb
function name:  (null)
number of ops:  5
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    5     0  E >   INIT_FCALL                                               'test'
          1        DECLARE_LAMBDA_FUNCTION                                  '%00%7Bclosure%7D%2Fin%2FW7RCb%3A5%240'
    7     2        SEND_VAL                                                 ~0
          3        DO_FCALL                                      0          
          4      > RETURN                                                   1

Function test:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/W7RCb
function name:  test
number of ops:  5
compiled vars:  !0 = $func
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   RECV                                             !0      
    3     1        INIT_USER_CALL                                0          'call_user_func', !0
          2        DO_FCALL                                      0  $1      
          3        ECHO                                                     $1
    4     4      > RETURN                                                   null

End of function test

Function %00%7Bclosure%7D%2Fin%2FW7RCb%3A5%240:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/W7RCb
function name:  {closure}
number of ops:  2
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    6     0  E > > RETURN                                                   'test1234'
    7     1*     > RETURN                                                   null

End of function %00%7Bclosure%7D%2Fin%2FW7RCb%3A5%240

Generated using Vulcan Logic Dumper, using php 8.0.0


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