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<?php $str = "A123456789123B"; var_export( preg_split('/(?:^.|...)\K/', $str) );
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/4eVAP
function name:  (null)
number of ops:  9
compiled vars:  !0 = $str
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, 'A123456789123B'
    5     1        INIT_FCALL                                                   'var_export'
    6     2        INIT_FCALL                                                   'preg_split'
          3        SEND_VAL                                                     '%2F%28%3F%3A%5E.%7C...%29%5CK%2F'
          4        SEND_VAR                                                     !0
          5        DO_ICALL                                             $2      
          6        SEND_VAR                                                     $2
    5     7        DO_ICALL                                                     
    7     8      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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