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<?php $str="1e5"; $value = $str; var_dump([ "intval" => intval($value, 10), "(string)(int)"=> (string)(int) $value, '$value === (string)(int) $value' => ($value === (string)(int)$value) ]);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/iQ6VB
function name:  (null)
number of ops:  18
compiled vars:  !0 = $str, !1 = $value
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, '1e5'
    4     1        ASSIGN                                                   !1, !0
    5     2        INIT_FCALL                                               'var_dump'
    6     3        INIT_FCALL                                               'intval'
          4        SEND_VAR                                                 !1
          5        SEND_VAL                                                 10
          6        DO_ICALL                                         $4      
          7        INIT_ARRAY                                       ~5      $4, 'intval'
    7     8        CAST                                          4  ~6      !1
          9        CAST                                          6  ~7      ~6
         10        ADD_ARRAY_ELEMENT                                ~5      ~7, '%28string%29%28int%29'
    8    11        CAST                                          4  ~8      !1
         12        CAST                                          6  ~9      ~8
         13        IS_IDENTICAL                                     ~10     !1, ~9
         14        ADD_ARRAY_ELEMENT                                ~5      ~10, '%24value+%3D%3D%3D+%28string%29%28int%29+%24value'
         15        SEND_VAL                                                 ~5
    5    16        DO_ICALL                                                 
    9    17      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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