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<?php $a = call_user_func(function($v){ return $v;}, mt_rand()); var_dump($a !== $a);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/c9onk
function name:  (null)
number of ops:  12
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   DECLARE_LAMBDA_FUNCTION                                  '%00%7Bclosure%7D%2Fin%2Fc9onk%3A3%240'
          1        INIT_USER_CALL                                1          'call_user_func', ~1
          2        INIT_FCALL                                               'mt_rand'
          3        DO_ICALL                                         $2      
          4        SEND_USER                                                $2
          5        DO_FCALL                                      0  $3      
          6        ASSIGN                                                   !0, $3
    5     7        INIT_FCALL                                               'var_dump'
          8        IS_NOT_IDENTICAL                                 ~5      !0, !0
          9        SEND_VAL                                                 ~5
         10        DO_ICALL                                                 
         11      > RETURN                                                   1

Function %00%7Bclosure%7D%2Fin%2Fc9onk%3A3%240:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/c9onk
function name:  {closure}
number of ops:  3
compiled vars:  !0 = $v
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV                                             !0      
          1      > RETURN                                                   !0
          2*     > RETURN                                                   null

End of function %00%7Bclosure%7D%2Fin%2Fc9onk%3A3%240

Generated using Vulcan Logic Dumper, using php 8.0.0


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