3v4l.org

run code in 300+ PHP versions simultaneously
<?php function doSomething( &$arg ) { $return = $arg; $arg += 1; echo $return; return $return; } $a = 3; $b = doSomething( $a ); echo "a=$a,b=$b";
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/8hkQZ
function name:  (null)
number of ops:  11
compiled vars:  !0 = $a, !1 = $b
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   11     0  E >   ASSIGN                                                   !0, 3
   12     1        INIT_FCALL                                               'dosomething'
          2        SEND_REF                                                 !0
          3        DO_FCALL                                      0  $3      
          4        ASSIGN                                                   !1, $3
   13     5        ROPE_INIT                                     4  ~6      'a%3D'
          6        ROPE_ADD                                      1  ~6      ~6, !0
          7        ROPE_ADD                                      2  ~6      ~6, '%2Cb%3D'
          8        ROPE_END                                      3  ~5      ~6, !1
          9        ECHO                                                     ~5
         10      > RETURN                                                   1

Function dosomething:
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/8hkQZ
function name:  doSomething
number of ops:  6
compiled vars:  !0 = $arg, !1 = $return
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   RECV                                             !0      
    5     1        ASSIGN                                                   !1, !0
    6     2        ASSIGN_OP                                     1          !0, 1
    7     3        ECHO                                                     !1
    8     4      > RETURN                                                   !1
    9     5*     > RETURN                                                   null

End of function dosomething

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
156.94 ms | 1397 KiB | 14 Q