3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a=array("x", "y", "z"); $b=$a; array_unshift($b,"m"); print_r($a); print_r($b);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/YBA33
function name:  (null)
number of ops:  13
compiled vars:  !0 = $a, !1 = $b
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <array>
    3     1        ASSIGN                                                   !1, !0
    4     2        INIT_FCALL                                               'array_unshift'
          3        SEND_REF                                                 !1
          4        SEND_VAL                                                 'm'
          5        DO_ICALL                                                 
    5     6        INIT_FCALL                                               'print_r'
          7        SEND_VAR                                                 !0
          8        DO_ICALL                                                 
    6     9        INIT_FCALL                                               'print_r'
         10        SEND_VAR                                                 !1
         11        DO_ICALL                                                 
         12      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


preferences:
163.15 ms | 1394 KiB | 17 Q