3v4l.org

run code in 300+ PHP versions simultaneously
<?php $s = ''; if (empty($s['offset'])) { print "empty"; } else { print "not empty"; } $s = ''; if (empty($s['double offset']['offset'])) { print "empty"; } else { print "not empty"; } $s = array('double offset' => ''); if (empty($s['double offset']['offset']['set off'])) { print "empty"; } else { print "not empty"; }
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 = 10, Position 2 = 12
Branch analysis from position: 10
1 jumps found. (Code = 42) Position 1 = 13
Branch analysis from position: 13
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: 12
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: 5
2 jumps found. (Code = 43) Position 1 = 10, Position 2 = 12
Branch analysis from position: 10
Branch analysis from position: 12
filename:       /in/8eVhW
function name:  (null)
number of ops:  22
compiled vars:  !0 = $s
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, ''
    4     1        ISSET_ISEMPTY_DIM_OBJ                         1          !0, 'offset'
          2      > JMPZ                                                     ~2, ->5
    5     3    >   ECHO                                                     'empty'
          4      > JMP                                                      ->6
    8     5    >   ECHO                                                     'not+empty'
   11     6    >   ASSIGN                                                   !0, ''
   12     7        FETCH_DIM_IS                                     ~4      !0, 'double+offset'
          8        ISSET_ISEMPTY_DIM_OBJ                         1          ~4, 'offset'
          9      > JMPZ                                                     ~5, ->12
   13    10    >   ECHO                                                     'empty'
         11      > JMP                                                      ->13
   16    12    >   ECHO                                                     'not+empty'
   19    13    >   ASSIGN                                                   !0, <array>
   20    14        FETCH_DIM_IS                                     ~7      !0, 'double+offset'
         15        FETCH_DIM_IS                                     ~8      ~7, 'offset'
         16        ISSET_ISEMPTY_DIM_OBJ                         1          ~8, 'set+off'
         17      > JMPZ                                                     ~9, ->20
   21    18    >   ECHO                                                     'empty'
         19      > JMP                                                      ->21
   24    20    >   ECHO                                                     'not+empty'
   25    21    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
152.95 ms | 1395 KiB | 13 Q