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<?php $startDate = "2020-02-01"; $endDate = "2020-03-11"; date_default_timezone_set("Europe/Berlin"); $diff = date_create($startDate)->diff(date_create($endDate)); $test = date_create($startDate)->add($diff)->format("Y-m-d"); echo "test: ".$test." expected: ".$endDate;
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/gWteh
function name:  (null)
number of ops:  30
compiled vars:  !0 = $startDate, !1 = $endDate, !2 = $diff, !3 = $test
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, '2020-02-01'
    3     1        ASSIGN                                                   !1, '2020-03-11'
    5     2        INIT_FCALL                                               'date_default_timezone_set'
          3        SEND_VAL                                                 'Europe%2FBerlin'
          4        DO_ICALL                                                 
    7     5        INIT_FCALL                                               'date_create'
          6        SEND_VAR                                                 !0
          7        DO_ICALL                                         $7      
          8        INIT_METHOD_CALL                                         $7, 'diff'
          9        INIT_FCALL                                               'date_create'
         10        SEND_VAR                                                 !1
         11        DO_ICALL                                         $8      
         12        SEND_VAR_NO_REF_EX                                       $8
         13        DO_FCALL                                      0  $9      
         14        ASSIGN                                                   !2, $9
    9    15        INIT_FCALL                                               'date_create'
         16        SEND_VAR                                                 !0
         17        DO_ICALL                                         $11     
         18        INIT_METHOD_CALL                                         $11, 'add'
         19        SEND_VAR_EX                                              !2
         20        DO_FCALL                                      0  $12     
         21        INIT_METHOD_CALL                                         $12, 'format'
         22        SEND_VAL_EX                                              'Y-m-d'
         23        DO_FCALL                                      0  $13     
         24        ASSIGN                                                   !3, $13
   11    25        CONCAT                                           ~15     'test%3A+', !3
         26        CONCAT                                           ~16     ~15, '+expected%3A+'
         27        CONCAT                                           ~17     ~16, !1
         28        ECHO                                                     ~17
   12    29      > RETURN                                                   1

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