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<?php $tests = [ '1,000.00', '1,000.000', '1.000,00', '1.000,000', '1.00', '1.000', '1,00', '1,000', ]; var_export( preg_replace( ['/[.,](?=\d*[.,])/', '/,/'], ['', '.'], $tests ) );
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/0jk0F
function name:  (null)
number of ops:  7
compiled vars:  !0 = $tests
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                       !0, <array>
   13     1        INIT_FCALL                                                   'var_export'
   14     2        FRAMELESS_ICALL_3                preg_replace        ~2      <array>, <array>
   17     3        OP_DATA                                                      !0
          4        SEND_VAL                                                     ~2
   13     5        DO_ICALL                                                     
   19     6      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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