3v4l.org

run code in 300+ PHP versions simultaneously
<?php $foo = 1; if (isset($foo)) echo 'hi'; ?>
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 3, Position 2 = 4
Branch analysis from position: 3
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 4
filename:       /in/Y8gFm
function name:  (null)
number of ops:  5
compiled vars:  !0 = $foo
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, 1
    3     1        ISSET_ISEMPTY_CV                                         !0
          2      > JMPZ                                                     ~2, ->4
          3    >   ECHO                                                     'hi'
    6     4    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
156.42 ms | 1383 KiB | 13 Q