3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = 0 + 1 . 3 - 4; $x .= 'a'; $x .= 'b'; $a = 10; isset($x['a'][2]);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/PhLEW
function name:  (null)
number of ops:  8
compiled vars:  !0 = $x, !1 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, '1-1'
    5     1        ASSIGN_OP                                     8          !0, 'a'
    6     2        ASSIGN_OP                                     8          !0, 'b'
    8     3        ASSIGN                                                   !1, 10
    9     4        FETCH_DIM_IS                                     ~6      !0, 'a'
          5        ISSET_ISEMPTY_DIM_OBJ                         0  ~7      ~6, 2
          6        FREE                                                     ~7
          7      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
154.25 ms | 1384 KiB | 13 Q