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<?php date_default_timezone_set('Europe/Berlin'); // birthdate format is YYYY-MM-DD $birth = new DateTime('1966-01-21'); $today = new DateTime('21-01-2011'); $diff = $birth->diff($today); echo $diff->format('%y') . PHP_EOL; // will output 45 $birth = new DateTime('1966-01-23'); $today = new DateTime('21-01-2011'); $diff = $birth->diff($today); echo $diff->format('%y') . PHP_EOL; // will output 45 wrongly $birth = new DateTime('1966-01-24'); // three days difference! $today = new DateTime('21-01-2011'); $diff = $birth->diff($today); echo $diff->format('%y') . PHP_EOL; // will output 44 - correct ?>
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/R2ulp
function name:  (null)
number of ops:  55
compiled vars:  !0 = $birth, !1 = $today, !2 = $diff
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   INIT_FCALL                                               'date_default_timezone_set'
          1        SEND_VAL                                                 'Europe%2FBerlin'
          2        DO_ICALL                                                 
    5     3        NEW                                              $4      'DateTime'
          4        SEND_VAL_EX                                              '1966-01-21'
          5        DO_FCALL                                      0          
          6        ASSIGN                                                   !0, $4
    6     7        NEW                                              $7      'DateTime'
          8        SEND_VAL_EX                                              '21-01-2011'
          9        DO_FCALL                                      0          
         10        ASSIGN                                                   !1, $7
    7    11        INIT_METHOD_CALL                                         !0, 'diff'
         12        SEND_VAR_EX                                              !1
         13        DO_FCALL                                      0  $10     
         14        ASSIGN                                                   !2, $10
    8    15        INIT_METHOD_CALL                                         !2, 'format'
         16        SEND_VAL_EX                                              '%25y'
         17        DO_FCALL                                      0  $12     
         18        CONCAT                                           ~13     $12, '%0A'
         19        ECHO                                                     ~13
   10    20        NEW                                              $14     'DateTime'
         21        SEND_VAL_EX                                              '1966-01-23'
         22        DO_FCALL                                      0          
         23        ASSIGN                                                   !0, $14
   11    24        NEW                                              $17     'DateTime'
         25        SEND_VAL_EX                                              '21-01-2011'
         26        DO_FCALL                                      0          
         27        ASSIGN                                                   !1, $17
   12    28        INIT_METHOD_CALL                                         !0, 'diff'
         29        SEND_VAR_EX                                              !1
         30        DO_FCALL                                      0  $20     
         31        ASSIGN                                                   !2, $20
   13    32        INIT_METHOD_CALL                                         !2, 'format'
         33        SEND_VAL_EX                                              '%25y'
         34        DO_FCALL                                      0  $22     
         35        CONCAT                                           ~23     $22, '%0A'
         36        ECHO                                                     ~23
   15    37        NEW                                              $24     'DateTime'
         38        SEND_VAL_EX                                              '1966-01-24'
         39        DO_FCALL                                      0          
         40        ASSIGN                                                   !0, $24
   16    41        NEW                                              $27     'DateTime'
         42        SEND_VAL_EX                                              '21-01-2011'
         43        DO_FCALL                                      0          
         44        ASSIGN                                                   !1, $27
   17    45        INIT_METHOD_CALL                                         !0, 'diff'
         46        SEND_VAR_EX                                              !1
         47        DO_FCALL                                      0  $30     
         48        ASSIGN                                                   !2, $30
   18    49        INIT_METHOD_CALL                                         !2, 'format'
         50        SEND_VAL_EX                                              '%25y'
         51        DO_FCALL                                      0  $32     
         52        CONCAT                                           ~33     $32, '%0A'
         53        ECHO                                                     ~33
   19    54      > RETURN                                                   1

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