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<?php function date_interval_iso(DateInterval $interval, string $default = 'PT0F') { static $f = ['S0F', 'M0S', 'H0M', 'DT0H', 'M0D', 'P0Y', 'Y0M', 'P0M']; static $r = ['S', 'M', 'H', 'DT', 'M', 'P', 'Y', 'P']; return rtrim(str_replace($f, $r, $interval->format('P%yY%mM%dDT%hH%iM%sS%fF') ), 'PT') ?: $default; } $date1 = new DateTimeImmutable(); $date2 = new DateTimeImmutable(); //test 0 duration DateInterval echo date_interval_iso($date1->diff($date1)) . PHP_EOL; //test microseconds echo date_interval_iso($date2->diff($date1));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/VFN7N
function name:  (null)
number of ops:  22
compiled vars:  !0 = $date1, !1 = $date2
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   13     0  E >   NEW                                                  $2      'DateTimeImmutable'
          1        DO_FCALL                                          0          
          2        ASSIGN                                                       !0, $2
   14     3        NEW                                                  $5      'DateTimeImmutable'
          4        DO_FCALL                                          0          
          5        ASSIGN                                                       !1, $5
   17     6        INIT_FCALL                                                   'date_interval_iso'
          7        INIT_METHOD_CALL                                             !0, 'diff'
          8        SEND_VAR_EX                                                  !0
          9        DO_FCALL                                          0  $8      
         10        SEND_VAR                                                     $8
         11        DO_FCALL                                          0  $9      
         12        CONCAT                                               ~10     $9, '%0A'
         13        ECHO                                                         ~10
   20    14        INIT_FCALL                                                   'date_interval_iso'
         15        INIT_METHOD_CALL                                             !1, 'diff'
         16        SEND_VAR_EX                                                  !0
         17        DO_FCALL                                          0  $11     
         18        SEND_VAR                                                     $11
         19        DO_FCALL                                          0  $12     
         20        ECHO                                                         $12
         21      > RETURN                                                       1

Function date_interval_iso:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/VFN7N
function name:  date_interval_iso
number of ops:  17
compiled vars:  !0 = $interval, !1 = $default, !2 = $f, !3 = $r
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   RECV                                                 !0      
          1        RECV_INIT                                            !1      'PT0F'
    4     2        BIND_STATIC                                                  !2
    5     3        BIND_STATIC                                                  !3
    7     4        INIT_FCALL                                                   'rtrim'
    8     5        INIT_METHOD_CALL                                             !0, 'format'
          6        SEND_VAL_EX                                                  'P%25yY%25mM%25dDT%25hH%25iM%25sS%25fF'
          7        DO_FCALL                                          0  $4      
    7     8        FRAMELESS_ICALL_3                str_replace         ~5      !2, !3
    8     9        OP_DATA                                                      $4
         10        SEND_VAL                                                     ~5
    9    11        SEND_VAL                                                     'PT'
    7    12        DO_ICALL                                             $6      
    9    13        JMP_SET                                              ~7      $6, ->15
         14        QM_ASSIGN                                            ~7      !1
         15      > RETURN                                                       ~7
   10    16*     > RETURN                                                       null

End of function date_interval_iso

Generated using Vulcan Logic Dumper, using php 8.5.0


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