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<?php $arr = array('11-01-2012', '01-01-2014', '01-01-2015', '09-02-2013', '01-01-2013'); function date_sort($a, $b) { return strtotime($a) - strtotime($b); } usort($arr, "date_sort"); print_r($arr);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/RAYTX
function name:  (null)
number of ops:  10
compiled vars:  !0 = $arr
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   2     0  E >   ASSIGN                                                   !0, <array>
   3     1        NOP                                                      
   6     2        INIT_FCALL                                               'usort'
         3        SEND_REF                                                 !0
         4        SEND_VAL                                                 'date_sort'
         5        DO_ICALL                                                 
   7     6        INIT_FCALL                                               'print_r'
         7        SEND_VAR                                                 !0
         8        DO_ICALL                                                 
         9      > RETURN                                                   1

Function date_sort:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/RAYTX
function name:  date_sort
number of ops:  11
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        SEND_VAR                                                 !0
         4        DO_ICALL                                         $2      
         5        INIT_FCALL                                               'strtotime'
         6        SEND_VAR                                                 !1
         7        DO_ICALL                                         $3      
         8        SUB                                              ~4      $2, $3
         9      > RETURN                                                   ~4
   5    10*     > RETURN                                                   null

End of function date_sort

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