3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a['length'] = 3; $length = (int) isset($a['length']) ? $a['length'] : -1; echo $length;
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 5, Position 2 = 8
Branch analysis from position: 5
1 jumps found. (Code = 42) Position 1 = 9
Branch analysis from position: 9
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 8
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/sIDbt
function name:  (null)
number of ops:  12
compiled vars:  !0 = $a, !1 = $length
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN_DIM                                               !0, 'length'
          1        OP_DATA                                                  3
    3     2        ISSET_ISEMPTY_DIM_OBJ                         0  ~3      !0, 'length'
          3        CAST                                          4  ~4      ~3
          4      > JMPZ                                                     ~4, ->8
          5    >   FETCH_DIM_R                                      ~5      !0, 'length'
          6        QM_ASSIGN                                        ~6      ~5
          7      > JMP                                                      ->9
          8    >   QM_ASSIGN                                        ~6      -1
          9    >   ASSIGN                                                   !1, ~6
    4    10        ECHO                                                     !1
    5    11      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
154.47 ms | 1011 KiB | 13 Q