3v4l.org

run code in 300+ PHP versions simultaneously
<?php $y[0] = 'Good'; $y[1] = ' morning!'; echo "${y[0]}${y[1]}"; echo ${y[0]},${y[1]};
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/Q2Wa0
function name:  (null)
number of ops:  18
compiled vars:  !0 = $y
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN_DIM                                               !0, 0
          1        OP_DATA                                                  'Good'
    4     2        ASSIGN_DIM                                               !0, 1
          3        OP_DATA                                                  '+morning%21'
    5     4        FETCH_DIM_R                                      ~3      !0, 0
          5        NOP                                                      
          6        FETCH_DIM_R                                      ~4      !0, 1
          7        FAST_CONCAT                                      ~5      ~3, ~4
          8        ECHO                                                     ~5
    6     9        FETCH_CONSTANT                                   ~6      'y'
         10        FETCH_DIM_R                                      ~7      ~6, 0
         11        FETCH_R                      local               ~8      ~7
         12        ECHO                                                     ~8
         13        FETCH_CONSTANT                                   ~9      'y'
         14        FETCH_DIM_R                                      ~10     ~9, 1
         15        FETCH_R                      local               ~11     ~10
         16        ECHO                                                     ~11
         17      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
164.8 ms | 1393 KiB | 13 Q