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<?php $workspace_id = null; if(!$workspace_id) { echo "I'm not"; } else { echo "I am!"; }
based on rJ62f
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
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 5
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/DaQjh
function name:  (null)
number of ops:  7
compiled vars:  !0 = $workspace_id
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   ASSIGN                                                   !0, null
   5     1        BOOL_NOT                                         ~2      !0
         2      > JMPZ                                                     ~2, ->5
   6     3    >   ECHO                                                     'I%27m+not'
         4      > JMP                                                      ->6
   8     5    >   ECHO                                                     'I+am%21'
   9     6    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.3.0