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<?php call_user_func(function () { echo 'hello world!'; });
Finding entry points
Branch analysis from position: 0
Jump found. (Code = 62) Position 1 = -2
filename:       /in/7LXhL
function name:  (null)
number of ops:  4
compiled vars:  none
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   DECLARE_LAMBDA_FUNCTION                                  '%00%7Bclosure%7D%2Fin%2F7LXhL0x7f718161e03d'
   5     1        INIT_USER_CALL                                0          'call_user_func', ~0
         2        DO_FCALL                                      0          
         3      > RETURN                                                   1

Function %00%7Bclosure%7D%2Fin%2F7LXhL0x7f718161e03d:
Finding entry points
Branch analysis from position: 0
Jump found. (Code = 62) Position 1 = -2
filename:       /in/7LXhL
function name:  {closure}
number of ops:  2
compiled vars:  none
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   4     0  E >   ECHO                                                     'hello+world%21'
   5     1      > RETURN                                                   null

End of function %00%7Bclosure%7D%2Fin%2F7LXhL0x7f718161e03d

Generated using Vulcan Logic Dumper, using php 7.1.0