3v4l.org

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<?php $x = NULL; if (is_null($x)) { echo "x is null\n"; } else { echo "x is not null\n"; } if (isset($x)) { echo "x is set\n"; } else { echo "x is not set\n"; } if (is_null($y)) { echo "y is null\n"; } else { echo "y is not null\n"; } if (isset($y)) { echo "y is set\n"; } else { echo "y is not set\n"; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 3, Position 2 = 5
Branch analysis from position: 3
1 jumps found. (Code = 42) Position 1 = 6
Branch analysis from position: 6
2 jumps found. (Code = 43) Position 1 = 8, Position 2 = 10
Branch analysis from position: 8
1 jumps found. (Code = 42) Position 1 = 11
Branch analysis from position: 11
2 jumps found. (Code = 43) Position 1 = 13, Position 2 = 15
Branch analysis from position: 13
1 jumps found. (Code = 42) Position 1 = 16
Branch analysis from position: 16
2 jumps found. (Code = 43) Position 1 = 18, Position 2 = 20
Branch analysis from position: 18
1 jumps found. (Code = 42) Position 1 = 21
Branch analysis from position: 21
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 20
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 15
2 jumps found. (Code = 43) Position 1 = 18, Position 2 = 20
Branch analysis from position: 18
Branch analysis from position: 20
Branch analysis from position: 10
2 jumps found. (Code = 43) Position 1 = 13, Position 2 = 15
Branch analysis from position: 13
Branch analysis from position: 15
Branch analysis from position: 5
2 jumps found. (Code = 43) Position 1 = 8, Position 2 = 10
Branch analysis from position: 8
Branch analysis from position: 10
filename:       /in/U8jpj
function name:  (null)
number of ops:  22
compiled vars:  !0 = $x, !1 = $y
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, null
    4     1        TYPE_CHECK                                    2          !0
          2      > JMPZ                                                     ~3, ->5
          3    >   ECHO                                                     'x+is+null%0A'
          4      > JMP                                                      ->6
          5    >   ECHO                                                     'x+is+not+null%0A'
    5     6    >   ISSET_ISEMPTY_CV                                         !0
          7      > JMPZ                                                     ~4, ->10
          8    >   ECHO                                                     'x+is+set%0A'
          9      > JMP                                                      ->11
         10    >   ECHO                                                     'x+is+not+set%0A'
    7    11    >   TYPE_CHECK                                    2          !1
         12      > JMPZ                                                     ~5, ->15
         13    >   ECHO                                                     'y+is+null%0A'
         14      > JMP                                                      ->16
         15    >   ECHO                                                     'y+is+not+null%0A'
    8    16    >   ISSET_ISEMPTY_CV                                         !1
         17      > JMPZ                                                     ~6, ->20
         18    >   ECHO                                                     'y+is+set%0A'
         19      > JMP                                                      ->21
         20    >   ECHO                                                     'y+is+not+set%0A'
         21    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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140.05 ms | 1395 KiB | 13 Q