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<?php $variable1 = $variable2 = $variable3 = $variable4 = ''; var_dump($variable1, $variable2, $variable3, $variable4);
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /in/rn2VX
function name:  (null)
number of ops:  11
compiled vars:  !0 = $variable1, !1 = $variable2, !2 = $variable3, !3 = $variable4
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   2     0  E >   ASSIGN                                           $4      !3, ''
         1        ASSIGN                                           $5      !2, $4
         2        ASSIGN                                           $6      !1, $5
         3        ASSIGN                                                   !0, $6
   4     4        INIT_FCALL                                               'var_dump'
         5        SEND_VAR                                                 !0
         6        SEND_VAR                                                 !1
         7        SEND_VAR                                                 !2
         8        SEND_VAR                                                 !3
         9        DO_ICALL                                                 
        10      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.2.0