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<?php $date=date_create("2013-03-15"); date_sub($date,"40 days"); echo date_format($date,"Y-m-d"); ?>
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/jbrRa
function name:  (null)
number of ops:  14
compiled vars:  !0 = $date
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   INIT_FCALL                                               'date_create'
          1        SEND_VAL                                                 '2013-03-15'
          2        DO_ICALL                                         $1      
          3        ASSIGN                                                   !0, $1
    3     4        INIT_FCALL                                               'date_sub'
          5        SEND_VAR                                                 !0
          6        SEND_VAL                                                 '40+days'
          7        DO_ICALL                                                 
    4     8        INIT_FCALL                                               'date_format'
          9        SEND_VAR                                                 !0
         10        SEND_VAL                                                 'Y-m-d'
         11        DO_ICALL                                         $4      
         12        ECHO                                                     $4
    5    13      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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