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<?php function ageMonths($dob) { //new date time $dob must be Y-m-d format $dobObject = DateTime::createFromFormat('Y-m-d',$dob); //current date $nowObject = new DateTime('2014-03-11'); //difference $diff = $nowObject->diff($dobObject); return "{$nowObject->format('Y-m-d H:i:s')} - {$nowObject->format('Y-m-d H:i:s')} = {$diff->format('%r%Y-%M-%D %H:%I:%S')} = {$diff->format('%r%a')} days"; } $date = new DateTime('2014-03-12'); while ($date >= new DateTime('2014-01-01')) { echo ageMonths($date->format('Y-m-d')), PHP_EOL; $date->sub(new DateInterval('P1D')); }
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 42) Position 1 = 19
Branch analysis from position: 19
2 jumps found. (Code = 44) Position 1 = 24, Position 2 = 5
Branch analysis from position: 24
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 5
2 jumps found. (Code = 44) Position 1 = 24, Position 2 = 5
Branch analysis from position: 24
Branch analysis from position: 5
filename:       /in/akYjs
function name:  (null)
number of ops:  25
compiled vars:  !0 = $date
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   16     0  E >   NEW                                              $1      'DateTime'
          1        SEND_VAL_EX                                              '2014-03-12'
          2        DO_FCALL                                      0          
          3        ASSIGN                                                   !0, $1
   18     4      > JMP                                                      ->19
   19     5    >   INIT_FCALL                                               'agemonths'
          6        INIT_METHOD_CALL                                         !0, 'format'
          7        SEND_VAL_EX                                              'Y-m-d'
          8        DO_FCALL                                      0  $4      
          9        SEND_VAR                                                 $4
         10        DO_FCALL                                      0  $5      
         11        ECHO                                                     $5
         12        ECHO                                                     '%0A'
   20    13        INIT_METHOD_CALL                                         !0, 'sub'
         14        NEW                                              $6      'DateInterval'
         15        SEND_VAL_EX                                              'P1D'
         16        DO_FCALL                                      0          
         17        SEND_VAR_NO_REF_EX                                       $6
         18        DO_FCALL                                      0          
   18    19    >   NEW                                              $9      'DateTime'
         20        SEND_VAL_EX                                              '2014-01-01'
         21        DO_FCALL                                      0          
         22        IS_SMALLER_OR_EQUAL                                      $9, !0
         23      > JMPNZ                                                    ~11, ->5
   21    24    > > RETURN                                                   1

Function agemonths:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/akYjs
function name:  ageMonths
number of ops:  36
compiled vars:  !0 = $dob, !1 = $dobObject, !2 = $nowObject, !3 = $diff
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV                                             !0      
    6     1        INIT_STATIC_METHOD_CALL                                  'DateTime', 'createFromFormat'
          2        SEND_VAL                                                 'Y-m-d'
          3        SEND_VAR                                                 !0
          4        DO_FCALL                                      0  $4      
          5        ASSIGN                                                   !1, $4
    9     6        NEW                                              $6      'DateTime'
          7        SEND_VAL_EX                                              '2014-03-11'
          8        DO_FCALL                                      0          
          9        ASSIGN                                                   !2, $6
   12    10        INIT_METHOD_CALL                                         !2, 'diff'
         11        SEND_VAR_EX                                              !1
         12        DO_FCALL                                      0  $9      
         13        ASSIGN                                                   !3, $9
   13    14        INIT_METHOD_CALL                                         !2, 'format'
         15        SEND_VAL_EX                                              'Y-m-d+H%3Ai%3As'
         16        DO_FCALL                                      0  $11     
         17        ROPE_INIT                                     8  ~16     $11
         18        ROPE_ADD                                      1  ~16     ~16, '+-+'
         19        INIT_METHOD_CALL                                         !2, 'format'
         20        SEND_VAL_EX                                              'Y-m-d+H%3Ai%3As'
         21        DO_FCALL                                      0  $12     
         22        ROPE_ADD                                      2  ~16     ~16, $12
         23        ROPE_ADD                                      3  ~16     ~16, '+%3D+'
         24        INIT_METHOD_CALL                                         !3, 'format'
         25        SEND_VAL_EX                                              '%25r%25Y-%25M-%25D+%25H%3A%25I%3A%25S'
         26        DO_FCALL                                      0  $13     
         27        ROPE_ADD                                      4  ~16     ~16, $13
         28        ROPE_ADD                                      5  ~16     ~16, '+%3D+'
         29        INIT_METHOD_CALL                                         !3, 'format'
         30        SEND_VAL_EX                                              '%25r%25a'
         31        DO_FCALL                                      0  $14     
         32        ROPE_ADD                                      6  ~16     ~16, $14
         33        ROPE_END                                      7  ~15     ~16, '+days'
         34      > RETURN                                                   ~15
   14    35*     > RETURN                                                   null

End of function agemonths

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