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<?php $in = "10001101"; $out = preg_split('/(.)(?!\1)\K/', $in, -1, PREG_SPLIT_NO_EMPTY); print_r($out);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/NK3q0
function name:  (null)
number of ops:  12
compiled vars:  !0 = $in, !1 = $out
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, '10001101'
    4     1        INIT_FCALL                                               'preg_split'
          2        SEND_VAL                                                 '%2F%28.%29%28%3F%21%5C1%29%5CK%2F'
          3        SEND_VAR                                                 !0
          4        SEND_VAL                                                 -1
          5        SEND_VAL                                                 1
          6        DO_ICALL                                         $3      
          7        ASSIGN                                                   !1, $3
    6     8        INIT_FCALL                                               'print_r'
          9        SEND_VAR                                                 !1
         10        DO_ICALL                                                 
         11      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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