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<?php $var = 0; // Evaluates to true because $var is empty if (empty($var)) { echo '$var is either 0, empty, or not set at all'; } // Evaluates as true because $var is set if (isset($var)) { echo '$var is set even though it is empty'; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 3, Position 2 = 4
Branch analysis from position: 3
2 jumps found. (Code = 43) Position 1 = 6, Position 2 = 7
Branch analysis from position: 6
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 7
Branch analysis from position: 4
filename:       /in/jegp5
function name:  (null)
number of ops:  8
compiled vars:  !0 = $var
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, 0
    5     1        ISSET_ISEMPTY_CV                                         !0
          2      > JMPZ                                                     ~2, ->4
    6     3    >   ECHO                                                     '%24var+is+either+0%2C+empty%2C+or+not+set+at+all'
   10     4    >   ISSET_ISEMPTY_CV                                         !0
          5      > JMPZ                                                     ~3, ->7
   11     6    >   ECHO                                                     '%24var+is+set+even+though+it+is+empty'
   12     7    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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