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<?php class ResourceType { public function __destruct() { echo "Resource is released.\n"; } } function get_callback() { $some_resource = new ResourceType(); $fn = function() use($some_resource) { // // why is my lock released? var_dump($some_resource); // "Free that resource" $some_resource = null; }; return $fn; } $fn = get_callback(); echo "Before callback\n"; $fn(); echo "After callback\n";
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/gZai2
function name:  (null)
number of ops:  8
compiled vars:  !0 = $fn
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   21     0  E >   INIT_FCALL                                                   'get_callback'
          1        DO_FCALL                                          0  $1      
          2        ASSIGN                                                       !0, $1
   22     3        ECHO                                                         'Before+callback%0A'
   23     4        INIT_DYNAMIC_CALL                                            !0
          5        DO_FCALL                                          0          
   24     6        ECHO                                                         'After+callback%0A'
          7      > RETURN                                                       1

Function get_callback:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/gZai2
function name:  get_callback
number of ops:  8
compiled vars:  !0 = $some_resource, !1 = $fn
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   11     0  E >   NEW                                                  $2      'ResourceType'
          1        DO_FCALL                                          0          
          2        ASSIGN                                                       !0, $2
   12     3        DECLARE_LAMBDA_FUNCTION                              ~5      [0]
          4        BIND_LEXICAL                                                 ~5, !0
          5        ASSIGN                                                       !1, ~5
   18     6      > RETURN                                                       !1
   19     7*     > RETURN                                                       null


Dynamic Functions:
Dynamic Function 0
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/gZai2
function name:  {closure:get_callback():12}
number of ops:  6
compiled vars:  !0 = $some_resource
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   12     0  E >   BIND_STATIC                                                  !0
   14     1        INIT_FCALL                                                   'var_dump'
          2        SEND_VAR                                                     !0
          3        DO_ICALL                                                     
   16     4        ASSIGN                                                       !0, null
   17     5      > RETURN                                                       null

End of Dynamic Function 0

End of function get_callback

Class ResourceType:
Function __destruct:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/gZai2
function name:  __destruct
number of ops:  2
compiled vars:  none
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    5     0  E >   ECHO                                                         'Resource+is+released.%0A'
    6     1      > RETURN                                                       null

End of function __destruct

End of class ResourceType.

Generated using Vulcan Logic Dumper, using php 8.5.0


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