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run code in 300+ PHP versions simultaneously
<?php switch (true) { case $a = 1; echo $a . "\n"; case $a = 2; echo $a . "\n"; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 44) Position 1 = 2, Position 2 = 5
Branch analysis from position: 2
2 jumps found. (Code = 44) Position 1 = 4, Position 2 = 7
Branch analysis from position: 4
1 jumps found. (Code = 42) Position 1 = 9
Branch analysis from position: 9
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 7
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 5
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/SkmiF
function name:  (null)
number of ops:  10
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    4     0  E >   ASSIGN                                           ~2      !0, 1
          1      > JMPNZ                                                    ~2, ->5
    6     2    >   ASSIGN                                           ~3      !0, 2
          3      > JMPNZ                                                    ~3, ->7
          4    > > JMP                                                      ->9
    5     5    >   CONCAT                                           ~4      !0, '%0A'
          6        ECHO                                                     ~4
    7     7    >   CONCAT                                           ~5      !0, '%0A'
          8        ECHO                                                     ~5
    8     9    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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