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<?php $myvar = '[{"value":"11","label":"labelQuery"}]'; print_r($myvar);
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /in/sYgCA
function name:  (null)
number of ops:  5
compiled vars:  !0 = $myvar
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   2     0  E >   ASSIGN                                                   !0, '%5B%7B%22value%22%3A%2211%22%2C%22label%22%3A%22labelQuery%22%7D%5D'
   3     1        INIT_FCALL                                               'print_r'
         2        SEND_VAR                                                 !0
         3        DO_ICALL                                                 
         4      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.1.0