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<?php $brackets = '{{}{}{}{}}'; echo str_replace('{}','',$brackets);
Finding entry points
Branch analysis from position: 0
Jump found. Position 1 = -2
filename:       /in/jZNon
function name:  (null)
number of ops:  8
compiled vars:  !0 = $brackets
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   2     0  E >   ASSIGN                                                   !0, '%7B%7B%7D%7B%7D%7B%7D%7B%7D%7D'
   3     1        INIT_FCALL                                               'str_replace'
         2        SEND_VAL                                                 '%7B%7D'
         3        SEND_VAL                                                 ''
         4        SEND_VAR                                                 !0
         5        DO_ICALL                                         $2      
         6        ECHO                                                     $2
         7      > RETURN                                                   1

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