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<?php echo (new DateTime('2010-12-02'))->modify('first day of this month');
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/S077Y
function name:  (null)
number of ops:  8
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   NEW                                              $0      'DateTime'
          1        SEND_VAL_EX                                              '2010-12-02'
          2        DO_FCALL                                      0          
          3        INIT_METHOD_CALL                                         $0, 'modify'
          4        SEND_VAL_EX                                              'first+day+of+this+month'
          5        DO_FCALL                                      0  $2      
          6        ECHO                                                     $2
          7      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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