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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"])) { echo "set"; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 4, Position 2 = 5
Branch analysis from position: 4
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 5
filename:       /in/cZaCY
function name:  (null)
number of ops:  6
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        ISSET_ISEMPTY_DIM_OBJ                         0          ~2, 'foo'
          3      > JMPZ                                                     ~3, ->5
    7     4    >   ECHO                                                     'set'
    8     5    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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