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<?php echo is_null($x); echo $x == null; echo empty($x); echo '<HR>',(bool) !$x;
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/pcb5P
function name:  (null)
number of ops:  11
compiled vars:  !0 = $x
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   TYPE_CHECK                                    2  ~1      !0
          1        ECHO                                                     ~1
    3     2        IS_EQUAL                                         ~2      !0, null
          3        ECHO                                                     ~2
    4     4        ISSET_ISEMPTY_CV                                 ~3      !0
          5        ECHO                                                     ~3
    5     6        ECHO                                                     '%3CHR%3E'
          7        BOOL_NOT                                         ~4      !0
          8        BOOL                                             ~5      ~4
          9        ECHO                                                     ~5
         10      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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