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<?php $result = "°Freenew°\x90ɮ\xc2\xe4dfg"; //$result = trim($result,"\xc2"/*"\xa0"*/); echo preg_replace('#[\x00-\x1F\x7F-\x9F]#', '', $result);
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /in/ce81U
function name:  (null)
number of ops:  8
compiled vars:  !0 = $result
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   ASSIGN                                                   !0, '%C2%B0Freenew%C2%B0%90%C9%AE%C2%E4dfg'
   7     1        INIT_FCALL                                               'preg_replace'
         2        SEND_VAL                                                 '%23%5B%5Cx00-%5Cx1F%5Cx7F-%5Cx9F%5D%23'
         3        SEND_VAL                                                 ''
         4        SEND_VAR                                                 !0
         5        DO_ICALL                                         $2      
         6        ECHO                                                     $2
         7      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.2.0