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<?php $dates = array('1-2018','5-2019','10-2018','5-2020','9-1978','6-2001'); usort($dates, function($a,$b){ return strtotime('1-'.$a) <=>strtotime('1-'.$b);}); var_export($dates); echo "\n"; echo "Min: ".reset($dates)."\n"; echo "Max: ".end($dates)."\n";
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/lZocQ
function name:  (null)
number of ops:  23
compiled vars:  !0 = $dates
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <array>
    4     1        INIT_FCALL                                               'usort'
          2        SEND_REF                                                 !0
          3        DECLARE_LAMBDA_FUNCTION                          ~2      [0]
          4        SEND_VAL                                                 ~2
          5        DO_ICALL                                                 
    6     6        INIT_FCALL                                               'var_export'
          7        SEND_VAR                                                 !0
          8        DO_ICALL                                                 
    7     9        ECHO                                                     '%0A'
    9    10        INIT_FCALL                                               'reset'
         11        SEND_REF                                                 !0
         12        DO_ICALL                                         $5      
         13        CONCAT                                           ~6      'Min%3A+', $5
         14        CONCAT                                           ~7      ~6, '%0A'
         15        ECHO                                                     ~7
   10    16        INIT_FCALL                                               'end'
         17        SEND_REF                                                 !0
         18        DO_ICALL                                         $8      
         19        CONCAT                                           ~9      'Max%3A+', $8
         20        CONCAT                                           ~10     ~9, '%0A'
         21        ECHO                                                     ~10
         22      > 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/lZocQ
function name:  {closure}
number of ops:  13
compiled vars:  !0 = $a, !1 = $b
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    4     0  E >   RECV                                             !0      
          1        RECV                                             !1      
          2        INIT_FCALL                                               'strtotime'
          3        CONCAT                                           ~2      '1-', !0
          4        SEND_VAL                                                 ~2
          5        DO_ICALL                                         $3      
          6        INIT_FCALL                                               'strtotime'
          7        CONCAT                                           ~4      '1-', !1
          8        SEND_VAL                                                 ~4
          9        DO_ICALL                                         $5      
         10        SPACESHIP                                        ~6      $3, $5
         11      > RETURN                                                   ~6
         12*     > RETURN                                                   null

End of Dynamic Function 0

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