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<?php $arr = [ "Jan 12 02:08:23 hello", "Dec 23 21:37:56 hello", //"Jan 12 02:08:23 hello", //"Jan 16 17:34:33 hello", "Feb 4 12:21:09 hello", "Mar 19 17:07:26 hello", "Apr 1 00:00:03 hello", "Nov 10 11:00:03 hello", "Apr 12 23:07:39 hello", "May 21 04:09:34 hello", "Jun 7 23:34:56 hello", "Sep 29 07:36:03 hello", "Jul 1 14:45:34 hello", "Aug 13 11:37:23 hello", "Sep 29 07:36:03 hello", "Oct 30 09:01:00 hello", "Nov 10 11:00:03 hello", "Dec 25 21:47:51 hello" ]; var_export( preg_replace_callback( '/^([a-z]{3}) +\d+/i', function($m) { static $lastMonthInt = 0; static $year = null; $year ??= date('Y', strtotime('-1 year')); $currentMonthInt = date('n', strtotime($m[1])); if ($currentMonthInt < $lastMonthInt) { ++$year; } $lastMonthInt = $currentMonthInt; return "$year " . date('m d', strtotime($m[0])); }, $arr ) );
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/JBvtv
function name:  (null)
number of ops:  11
compiled vars:  !0 = $arr
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
   24     1        INIT_FCALL                                               'var_export'
   25     2        INIT_FCALL                                               'preg_replace_callback'
   26     3        SEND_VAL                                                 '%2F%5E%28%5Ba-z%5D%7B3%7D%29+%2B%5Cd%2B%2Fi'
   27     4        DECLARE_LAMBDA_FUNCTION                          ~2      [0]
   37     5        SEND_VAL                                                 ~2
   38     6        SEND_VAR                                                 !0
   25     7        DO_ICALL                                         $3      
   38     8        SEND_VAR                                                 $3
   24     9        DO_ICALL                                                 
   40    10      > RETURN                                                   1


Dynamic Functions:
Dynamic Function 0
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 25, Position 2 = 26
Branch analysis from position: 25
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 26
filename:       /in/JBvtv
function name:  {closure}
number of ops:  40
compiled vars:  !0 = $m, !1 = $lastMonthInt, !2 = $year, !3 = $currentMonthInt
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   27     0  E >   RECV                                             !0      
   28     1        BIND_STATIC                                              !1
   29     2        BIND_STATIC                                              !2
   30     3        COALESCE                                         ~4      !2
          4        INIT_FCALL                                               'date'
          5        SEND_VAL                                                 'Y'
          6        INIT_FCALL                                               'strtotime'
          7        SEND_VAL                                                 '-1+year'
          8        DO_ICALL                                         $5      
          9        SEND_VAR                                                 $5
         10        DO_ICALL                                         $6      
         11        ASSIGN                                           ~7      !2, $6
         12        QM_ASSIGN                                        ~4      ~7
         13        FREE                                                     ~4
   31    14        INIT_FCALL                                               'date'
         15        SEND_VAL                                                 'n'
         16        INIT_FCALL                                               'strtotime'
         17        FETCH_DIM_R                                      ~8      !0, 1
         18        SEND_VAL                                                 ~8
         19        DO_ICALL                                         $9      
         20        SEND_VAR                                                 $9
         21        DO_ICALL                                         $10     
         22        ASSIGN                                                   !3, $10
   32    23        IS_SMALLER                                               !3, !1
         24      > JMPZ                                                     ~12, ->26
   33    25    >   PRE_INC                                                  !2
   35    26    >   ASSIGN                                                   !1, !3
   36    27        NOP                                                      
         28        FAST_CONCAT                                      ~15     !2, '+'
         29        INIT_FCALL                                               'date'
         30        SEND_VAL                                                 'm+d'
         31        INIT_FCALL                                               'strtotime'
         32        FETCH_DIM_R                                      ~16     !0, 0
         33        SEND_VAL                                                 ~16
         34        DO_ICALL                                         $17     
         35        SEND_VAR                                                 $17
         36        DO_ICALL                                         $18     
         37        CONCAT                                           ~19     ~15, $18
         38      > RETURN                                                   ~19
   37    39*     > RETURN                                                   null

End of Dynamic Function 0

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