3v4l.org

run code in 300+ PHP versions simultaneously
<?php $var = false; print_r(var_dump(isset($var), true));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/Eue7P
function name:  (null)
number of ops:  10
compiled vars:  !0 = $var
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <false>
    3     1        INIT_FCALL                                               'print_r'
          2        INIT_FCALL                                               'var_dump'
          3        ISSET_ISEMPTY_CV                                 ~2      !0
          4        SEND_VAL                                                 ~2
          5        SEND_VAL                                                 <true>
          6        DO_ICALL                                         $3      
          7        SEND_VAR                                                 $3
          8        DO_ICALL                                                 
          9      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
158.79 ms | 1385 KiB | 17 Q