3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = "PostgreSQL"; $y = "MySQL"; $z = &$x; $x = 'PHP 5'; $y = &$x; echo $x, $y, $z; echo $GLOBALS['x'], $GLOBALS['y'], $GLOBALS['z'];
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/YIX9Y
function name:  (null)
number of ops:  18
compiled vars:  !0 = $x, !1 = $y, !2 = $z
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, 'PostgreSQL'
    3     1        ASSIGN                                                   !1, 'MySQL'
    4     2        ASSIGN_REF                                               !2, !0
    5     3        ASSIGN                                                   !0, 'PHP+5'
    6     4        ASSIGN_REF                                               !1, !0
    8     5        ECHO                                                     !0
          6        ECHO                                                     !1
          7        ECHO                                                     !2
   10     8        FETCH_R                      global              ~8      'GLOBALS'
          9        FETCH_DIM_R                                      ~9      ~8, 'x'
         10        ECHO                                                     ~9
         11        FETCH_R                      global              ~10     'GLOBALS'
         12        FETCH_DIM_R                                      ~11     ~10, 'y'
         13        ECHO                                                     ~11
         14        FETCH_R                      global              ~12     'GLOBALS'
         15        FETCH_DIM_R                                      ~13     ~12, 'z'
         16        ECHO                                                     ~13
         17      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
151.69 ms | 1393 KiB | 13 Q