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<?php $data = ['beans' => 23, 'peas' => null, 'carrots' => 17, 'turnips' => '', 'potatoes' => 58]; $result = array_filter($data, fn($e) => empty($e)); echo print_r($result, 1);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/hgZg8
function name:  (null)
number of ops:  13
compiled vars:  !0 = $data, !1 = $result
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    4     1        INIT_FCALL                                               'array_filter'
          2        SEND_VAR                                                 !0
          3        DECLARE_LAMBDA_FUNCTION                          ~3      [0]
          4        SEND_VAL                                                 ~3
          5        DO_ICALL                                         $4      
          6        ASSIGN                                                   !1, $4
    5     7        INIT_FCALL                                               'print_r'
          8        SEND_VAR                                                 !1
          9        SEND_VAL                                                 1
         10        DO_ICALL                                         $6      
         11        ECHO                                                     $6
         12      > RETURN                                                   1


Dynamic Functions:
Dynamic Function 0
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/hgZg8
function name:  {closure}
number of ops:  4
compiled vars:  !0 = $e
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    4     0  E >   RECV                                             !0      
          1        ISSET_ISEMPTY_CV                                 ~1      !0
          2      > RETURN                                                   ~1
          3*     > RETURN                                                   null

End of Dynamic Function 0

Generated using Vulcan Logic Dumper, using php 8.0.0


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