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<?php $b = ($a = 1); echo $b;
Finding entry points
Branch analysis from position: 0
Jump found. (Code = 62) Position 1 = -2
filename:       /in/6KNC2
function name:  (null)
number of ops:  4
compiled vars:  !0 = $b, !1 = $a
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   ASSIGN                                           $2      !1, 1
         1        ASSIGN                                                   !0, $2
   4     2        ECHO                                                     !0
         3      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.3.0