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<?php $arr = [['11-01-2012', 1], ['01-01-2014', 2], ['01-01-2015', 3], ['09-02-2013', 4], ['01-01-2013', 5]]; function date_sort($a, $b) { return strtotime($a[0]) - strtotime($b[0]); } usort($arr, "date_sort"); print_r($arr);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/LADuo
function name:  (null)
number of ops:  9
compiled vars:  !0 = $arr
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <array>
    6     1        INIT_FCALL                                               'usort'
          2        SEND_REF                                                 !0
          3        SEND_VAL                                                 'date_sort'
          4        DO_ICALL                                                 
    7     5        INIT_FCALL                                               'print_r'
          6        SEND_VAR                                                 !0
          7        DO_ICALL                                                 
          8      > RETURN                                                   1

Function date_sort:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/LADuo
function name:  date_sort
number of ops:  13
compiled vars:  !0 = $a, !1 = $b
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV                                             !0      
          1        RECV                                             !1      
    4     2        INIT_FCALL                                               'strtotime'
          3        FETCH_DIM_R                                      ~2      !0, 0
          4        SEND_VAL                                                 ~2
          5        DO_ICALL                                         $3      
          6        INIT_FCALL                                               'strtotime'
          7        FETCH_DIM_R                                      ~4      !1, 0
          8        SEND_VAL                                                 ~4
          9        DO_ICALL                                         $5      
         10        SUB                                              ~6      $3, $5
         11      > RETURN                                                   ~6
    5    12*     > RETURN                                                   null

End of function date_sort

Generated using Vulcan Logic Dumper, using php 8.0.0


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