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<?php $line=" minchia= cazzo\=culo \= figa"; $parts=mb_split("\s*(?<!\\\)=\s*",$line); print_r($parts); echo mb_ereg_replace("\=", "=", $parts[1]);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/0EsJn
function name:  (null)
number of ops:  17
compiled vars:  !0 = $line, !1 = $parts
line     #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
   3     0  E >   ASSIGN                                                   !0, '+minchia%3D+cazzo%5C%3Dculo+%5C%3D+figa'
   5     1        INIT_FCALL                                               'mb_split'
         2        SEND_VAL                                                 '%5Cs%2A%28%3F%3C%21%5C%5C%29%3D%5Cs%2A'
         3        SEND_VAR                                                 !0
         4        DO_ICALL                                         $3      
         5        ASSIGN                                                   !1, $3
   6     6        INIT_FCALL                                               'print_r'
         7        SEND_VAR                                                 !1
         8        DO_ICALL                                                 
   7     9        INIT_FCALL                                               'mb_ereg_replace'
        10        SEND_VAL                                                 '%5C%3D'
        11        SEND_VAL                                                 '%3D'
        12        FETCH_DIM_R                                      $6      !1, 1
        13        SEND_VAR                                                 $6
        14        DO_ICALL                                         $7      
        15        ECHO                                                     $7
        16      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 7.3.0