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<?php var_dump(round(1.700000000000556, 12, PHP_ROUND_HALF_DOWN));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/HrlXq
function name:  (null)
number of ops:  9
compiled vars:  none
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    2     0  E >   INIT_FCALL                                                   'var_dump'
          1        INIT_FCALL                                                   'round'
          2        SEND_VAL                                                     1.7
          3        SEND_VAL                                                     12
          4        SEND_VAL                                                     2
          5        DO_ICALL                                             $0      
          6        SEND_VAR                                                     $0
          7        DO_ICALL                                                     
          8      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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