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<?php /** * @see https://community.developer.authorize.net/t5/The-Authorize-Net-Developer-Blog/Precision-Math-with-PHP/ba-p/8368 */ var_dump(floor((0.2 + 1.4) * 10)); // Should be 16. But it's 15! // Using BC Math var_dump(bcadd('0.2', '1.4', 2) * 10); // It's 16 like we would expect it to be. // Using GMP var_dump(gmp_add('0.2', '1.4') * 10);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/KKZWP
function name:  (null)
number of ops:  24
compiled vars:  none
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    7     0  E >   INIT_FCALL                                               'var_dump'
          1        INIT_FCALL                                               'floor'
          2        SEND_VAL                                                 16
          3        DO_ICALL                                         $0      
          4        SEND_VAR                                                 $0
          5        DO_ICALL                                                 
   10     6        INIT_FCALL                                               'var_dump'
          7        INIT_FCALL_BY_NAME                                       'bcadd'
          8        SEND_VAL_EX                                              '0.2'
          9        SEND_VAL_EX                                              '1.4'
         10        SEND_VAL_EX                                              2
         11        DO_FCALL                                      0  $2      
         12        MUL                                              ~3      $2, 10
         13        SEND_VAL                                                 ~3
         14        DO_ICALL                                                 
   13    15        INIT_FCALL                                               'var_dump'
         16        INIT_FCALL_BY_NAME                                       'gmp_add'
         17        SEND_VAL_EX                                              '0.2'
         18        SEND_VAL_EX                                              '1.4'
         19        DO_FCALL                                      0  $5      
         20        MUL                                              ~6      $5, 10
         21        SEND_VAL                                                 ~6
         22        DO_ICALL                                                 
         23      > RETURN                                                   1

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