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<?php $arr = array( "name" => "laruence", //如果这个值有可能是数组,或者字符串. ); if (isset($arr["name"]["foo"]["non-exists"])) { echo "set"; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 5, Position 2 = 6
Branch analysis from position: 5
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 6
filename:       /in/XLHIE
function name:  (null)
number of ops:  7
compiled vars:  !0 = $arr
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <array>
    6     1        FETCH_DIM_IS                                     ~2      !0, 'name'
          2        FETCH_DIM_IS                                     ~3      ~2, 'foo'
          3        ISSET_ISEMPTY_DIM_OBJ                         0          ~3, 'non-exists'
          4      > JMPZ                                                     ~4, ->6
    7     5    >   ECHO                                                     'set'
    8     6    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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