3v4l.org

run code in 300+ PHP versions simultaneously
<?php $var = 0; $empty = empty($var); var_dump($empty); $isZero = $var === 0; var_dump($isZero);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/qvaWt
function name:  (null)
number of ops:  12
compiled vars:  !0 = $var, !1 = $empty, !2 = $isZero
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 0
    6     1        ISSET_ISEMPTY_CV                                 ~4      !0
          2        ASSIGN                                                   !1, ~4
    8     3        INIT_FCALL                                               'var_dump'
          4        SEND_VAR                                                 !1
          5        DO_ICALL                                                 
   10     6        IS_IDENTICAL                                     ~7      !0, 0
          7        ASSIGN                                                   !2, ~7
   12     8        INIT_FCALL                                               'var_dump'
          9        SEND_VAR                                                 !2
         10        DO_ICALL                                                 
         11      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
164.21 ms | 1394 KiB | 15 Q