3v4l.org

run code in 300+ PHP versions simultaneously
<?php $_SERVER['DOCUMENT_ROOT']="php/asda"; $dirname = ("{$_SERVER['DOCUMENT_ROOT']}/f1/f2/");echo $dirname;
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/gpYQj
function name:  (null)
number of ops:  10
compiled vars:  !0 = $dirname
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   FETCH_W                      global              $1      '_SERVER'
          1        ASSIGN_DIM                                               $1, 'DOCUMENT_ROOT'
          2        OP_DATA                                                  'php%2Fasda'
    3     3        FETCH_R                      global              ~3      '_SERVER'
          4        FETCH_DIM_R                                      ~4      ~3, 'DOCUMENT_ROOT'
          5        NOP                                                      
          6        FAST_CONCAT                                      ~5      ~4, '%2Ff1%2Ff2%2F'
          7        ASSIGN                                                   !0, ~5
          8        ECHO                                                     !0
          9      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
149.4 ms | 1392 KiB | 13 Q