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<?php var_dump(json_decode('{"Symfony\\\\Component\\\\EventDispatcher\\\\Event":{"clientId":"10842265","amount":"545.00","fundId":"MTL","currencyId":"840","submitedByManagerDate":"2014-08-07","createDate":"2014-08-07"}}'));
based on pjtvU
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/g6IDg
function name:  (null)
number of ops:  7
compiled vars:  none
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   INIT_FCALL                                               'var_dump'
         1        INIT_FCALL                                               'json_decode'
         2        SEND_VAL                                                 '%7B%22Symfony%5C%5CComponent%5C%5CEventDispatcher%5C%5CEvent%22%3A%7B%22clientId%22%3A%2210842265%22%2C%22amount%22%3A%22545.00%22%2C%22fundId%22%3A%22MTL%22%2C%22currencyId%22%3A%22840%22%2C%22submitedByManagerDate%22%3A%222014-08-07%22%2C%22createDate%22%3A%222014-08-07%22%7D%7D'
         3        DO_ICALL                                         $0      
         4        SEND_VAR                                                 $0
         5        DO_ICALL                                                 
         6      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.3.0