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<?php var_dump(serialize(function () { }));
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /in/VtNH5
function name:  (null)
number of ops:  8
compiled vars:  none
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   INIT_FCALL                                               'var_dump'
         1        INIT_FCALL                                               'serialize'
         2        DECLARE_LAMBDA_FUNCTION                                  '%00%7Bclosure%7D%2Fin%2FVtNH50x7fb137e5c028'
         3        SEND_VAL                                                 ~0
         4        DO_ICALL                                         $1      
         5        SEND_VAR                                                 $1
         6        DO_ICALL                                                 
         7      > RETURN                                                   1

Function %00%7Bclosure%7D%2Fin%2FVtNH50x7fb137e5c028:
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /in/VtNH5
function name:  {closure}
number of ops:  1
compiled vars:  none
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
         0  E > > RETURN                                                   null

End of function %00%7Bclosure%7D%2Fin%2FVtNH50x7fb137e5c028

Generated using Vulcan Logic Dumper, using php 7.2.0