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<?php $json = json_decode('{"thumbnail":{"url":"http:\/\/www.livestream.com\/filestore\/user-files\/chlukeestv\/2010\/01\/04\/92609a8d-afa6-4832-a8b2-ac4dc2925f4b_10.jpg"}}'); var_dump($json->thumbnail->url);
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /in/oScYQ
function name:  (null)
number of ops:  10
compiled vars:  !0 = $json
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   INIT_FCALL                                               'json_decode'
         1        SEND_VAL                                                 '%7B%22thumbnail%22%3A%7B%22url%22%3A%22http%3A%5C%2F%5C%2Fwww.livestream.com%5C%2Ffilestore%5C%2Fuser-files%5C%2Fchlukeestv%5C%2F2010%5C%2F01%5C%2F04%5C%2F92609a8d-afa6-4832-a8b2-ac4dc2925f4b_10.jpg%22%7D%7D'
         2        DO_ICALL                                         $1      
         3        ASSIGN                                                   !0, $1
   4     4        INIT_FCALL                                               'var_dump'
         5        FETCH_OBJ_R                                      $3      !0, 'thumbnail'
         6        FETCH_OBJ_R                                      $4      $3, 'url'
         7        SEND_VAR                                                 $4
         8        DO_ICALL                                                 
         9      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.2.0