3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = array(1,2,3); if (!is_null($a) && !is_array($a)) { echo "The variable is an array."; } else { echo "The if clause was not run"; } /* echo isset($a)?'true':'false'; */
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 46) Position 1 = 4, Position 2 = 7
Branch analysis from position: 4
2 jumps found. (Code = 43) Position 1 = 8, Position 2 = 10
Branch analysis from position: 8
1 jumps found. (Code = 42) Position 1 = 11
Branch analysis from position: 11
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 10
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 7
filename:       /in/XlEtu
function name:  (null)
number of ops:  12
compiled vars:  !0 = $a
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, <array>
    5     1        TYPE_CHECK                                    2  ~2      !0
          2        BOOL_NOT                                         ~3      ~2
          3      > JMPZ_EX                                          ~3      ~3, ->7
          4    >   TYPE_CHECK                                  128  ~4      !0
          5        BOOL_NOT                                         ~5      ~4
          6        BOOL                                             ~3      ~5
          7    > > JMPZ                                                     ~3, ->10
          8    >   ECHO                                                     'The+variable+is+an+array.'
          9      > JMP                                                      ->11
    7    10    >   ECHO                                                     'The+if+clause+was+not+run'
    9    11    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
150.1 ms | 1384 KiB | 13 Q