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<?php $a = array('FILE'); $b = (string)$a; var_dump($b);
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /in/u98aP
function name:  (null)
number of ops:  7
compiled vars:  !0 = $a, !1 = $b
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   ASSIGN                                                   !0, <array>
   5     1        CAST                                          6  ~3      !0
         2        ASSIGN                                                   !1, ~3
   7     3        INIT_FCALL                                               'var_dump'
         4        SEND_VAR                                                 !1
         5        DO_ICALL                                                 
         6      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.2.0