3v4l.org

run code in 300+ PHP versions simultaneously
<?php $value = null; $test = (string)$value; echo ($test === null) ? 'null' : 'empty';
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 5, Position 2 = 7
Branch analysis from position: 5
1 jumps found. (Code = 42) Position 1 = 8
Branch analysis from position: 8
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 7
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/ZhhRS
function name:  (null)
number of ops:  10
compiled vars:  !0 = $value, !1 = $test
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, null
    5     1        CAST                                          6  ~3      !0
          2        ASSIGN                                                   !1, ~3
    7     3        TYPE_CHECK                                    2          !1
          4      > JMPZ                                                     ~5, ->7
          5    >   QM_ASSIGN                                        ~6      'null'
          6      > JMP                                                      ->8
          7    >   QM_ASSIGN                                        ~6      'empty'
          8    >   ECHO                                                     ~6
          9      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
150.45 ms | 1392 KiB | 13 Q