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<?php function acquire_some_resource() { return new class { public function __construct() { echo "<locked>\n"; } public function __destruct() { echo "</locked>\n"; } }; } echo "acquire some_resource\n"; $some_resource = acquire_some_resource(); echo "create fn capturing some_resource by value\n"; $fn = function () use ($some_resource) { $some_resource = null; // this line actually doesn't have any effect }; echo "call fn\n"; $fn(); echo "unset fn\n"; $fn = null; echo "unset some_resource\n"; $some_resource = null; echo "DONE.\n";
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/51jXY
function name:  (null)
number of ops:  17
compiled vars:  !0 = $some_resource, !1 = $fn
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   10     0  E >   ECHO                                                     'acquire+some_resource%0A'
   11     1        INIT_FCALL                                               'acquire_some_resource'
          2        DO_FCALL                                      0  $2      
          3        ASSIGN                                                   !0, $2
   12     4        ECHO                                                     'create+fn+capturing+some_resource+by+value%0A'
   13     5        DECLARE_LAMBDA_FUNCTION                                  '%00%7Bclosure%7D%2Fin%2F51jXY%3A13%241'
          6        BIND_LEXICAL                                             ~4, !0
          7        ASSIGN                                                   !1, ~4
   16     8        ECHO                                                     'call+fn%0A'
   17     9        INIT_DYNAMIC_CALL                                        !1
         10        DO_FCALL                                      0          
   18    11        ECHO                                                     'unset+fn%0A'
   19    12        ASSIGN                                                   !1, null
   20    13        ECHO                                                     'unset+some_resource%0A'
   21    14        ASSIGN                                                   !0, null
   22    15        ECHO                                                     'DONE.%0A'
         16      > RETURN                                                   1

Function acquire_some_resource:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/51jXY
function name:  acquire_some_resource
number of ops:  5
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    4     0  E >   DECLARE_ANON_CLASS                               2       
          1        NEW                                              $1      $0
          2        DO_FCALL                                      0          
          3      > RETURN                                                   $1
    8     4*     > RETURN                                                   null

End of function acquire_some_resource

Function %00%7Bclosure%7D%2Fin%2F51jXY%3A13%241:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/51jXY
function name:  {closure}
number of ops:  3
compiled vars:  !0 = $some_resource
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   13     0  E >   BIND_STATIC                                              !0
   14     1        ASSIGN                                                   !0, null
   15     2      > RETURN                                                   null

End of function %00%7Bclosure%7D%2Fin%2F51jXY%3A13%241

Class class@anonymous:
Function __construct:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/51jXY
function name:  __construct
number of ops:  2
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    5     0  E >   ECHO                                                     '%3Clocked%3E%0A'
          1      > RETURN                                                   null

End of function __construct

Function __destruct:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/51jXY
function name:  __destruct
number of ops:  2
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    6     0  E >   ECHO                                                     '%3C%2Flocked%3E%0A'
          1      > RETURN                                                   null

End of function __destruct

End of class class@anonymous.

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