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<?php $que = "aa bb33cc 5.po"; echo preg_replace('/(?<=[^0-9,. ])(?=[0-9,.])|(?<=[0-9,.])(?=[^0-9,. ])/',' ',$que) . PHP_EOL; echo preg_replace('/(?|([^0-9,. ])([0-9,.])|([0-9,.])([^0-9,. ]))/','$1 $2',$que) . PHP_EOL; echo preg_replace('/(?:([^0-9,. ])([0-9,.])|([0-9,.])([^0-9,. ]))/','$1$3 $2$4',$que);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/qkGBT
function name:  (null)
number of ops:  22
compiled vars:  !0 = $que
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'aa+bb33cc+5.po'
    4     1        INIT_FCALL                                               'preg_replace'
          2        SEND_VAL                                                 '%2F%28%3F%3C%3D%5B%5E0-9%2C.+%5D%29%28%3F%3D%5B0-9%2C.%5D%29%7C%28%3F%3C%3D%5B0-9%2C.%5D%29%28%3F%3D%5B%5E0-9%2C.+%5D%29%2F'
          3        SEND_VAL                                                 '+'
          4        SEND_VAR                                                 !0
          5        DO_ICALL                                         $2      
          6        CONCAT                                           ~3      $2, '%0A'
          7        ECHO                                                     ~3
    5     8        INIT_FCALL                                               'preg_replace'
          9        SEND_VAL                                                 '%2F%28%3F%7C%28%5B%5E0-9%2C.+%5D%29%28%5B0-9%2C.%5D%29%7C%28%5B0-9%2C.%5D%29%28%5B%5E0-9%2C.+%5D%29%29%2F'
         10        SEND_VAL                                                 '%241+%242'
         11        SEND_VAR                                                 !0
         12        DO_ICALL                                         $4      
         13        CONCAT                                           ~5      $4, '%0A'
         14        ECHO                                                     ~5
    6    15        INIT_FCALL                                               'preg_replace'
         16        SEND_VAL                                                 '%2F%28%3F%3A%28%5B%5E0-9%2C.+%5D%29%28%5B0-9%2C.%5D%29%7C%28%5B0-9%2C.%5D%29%28%5B%5E0-9%2C.+%5D%29%29%2F'
         17        SEND_VAL                                                 '%241%243+%242%244'
         18        SEND_VAR                                                 !0
         19        DO_ICALL                                         $6      
         20        ECHO                                                     $6
         21      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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