3v4l.org

run code in 300+ PHP versions simultaneously
<?php $f=7; function myfunction(&$d) { return $d++; } myfunction($f); echo $f; ?>
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/OgBEF
function name:  (null)
number of ops:  6
compiled vars:  !0 = $f
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, 7
    7     1        INIT_FCALL                                               'myfunction'
          2        SEND_REF                                                 !0
          3        DO_FCALL                                      0          
    8     4        ECHO                                                     !0
    9     5      > RETURN                                                   1

Function myfunction:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/OgBEF
function name:  myfunction
number of ops:  4
compiled vars:  !0 = $d
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   RECV                                             !0      
    5     1        POST_INC                                         ~1      !0
          2      > RETURN                                                   ~1
    6     3*     > RETURN                                                   null

End of function myfunction

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
164.08 ms | 1396 KiB | 14 Q