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<?php $value = IntlChar::getNumericValue("x"); var_dump($value); var_dump($value === IntlChar::NO_NUMERIC_VALUE);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/48Bnh
function name:  (null)
number of ops:  13
compiled vars:  !0 = $value
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_STATIC_METHOD_CALL                                  'IntlChar', 'getNumericValue'
          1        SEND_VAL_EX                                              'x'
          2        DO_FCALL                                      0  $1      
          3        ASSIGN                                                   !0, $1
    4     4        INIT_FCALL                                               'var_dump'
          5        SEND_VAR                                                 !0
          6        DO_ICALL                                                 
    5     7        INIT_FCALL                                               'var_dump'
          8        FETCH_CLASS_CONSTANT                             ~4      'IntlChar', 'NO_NUMERIC_VALUE'
          9        IS_IDENTICAL                                     ~5      !0, ~4
         10        SEND_VAL                                                 ~5
         11        DO_ICALL                                                 
         12      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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