3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = ''; $b = 'hello'; if(isset($a['hello']['pqr'])){ print 'Empty'; }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 5, Position 2 = 6
Branch analysis from position: 5
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 6
filename:       /in/BDGig
function name:  (null)
number of ops:  7
compiled vars:  !0 = $a, !1 = $b
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, ''
    3     1        ASSIGN                                                   !1, 'hello'
    4     2        FETCH_DIM_IS                                     ~4      !0, 'hello'
          3        ISSET_ISEMPTY_DIM_OBJ                         0          ~4, 'pqr'
          4      > JMPZ                                                     ~5, ->6
    5     5    >   ECHO                                                     'Empty'
    6     6    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
149.51 ms | 1384 KiB | 13 Q