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<?php $text = 'This {is {{Par}m1}} plus {{Par{m3a{{Parm3b}}}} a}nd {{Parm4a||{{Par}m4b||{{Parm4c||{{Parm4d||Parm}}}}}}}}.'; $res = preg_split('~({{(?:(?!{{|}}).|(?1))*}})~', $text, -1, PREG_SPLIT_DELIM_CAPTURE | PREG_SPLIT_NO_EMPTY); print_r($res);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/htTAR
function name:  (null)
number of ops:  12
compiled vars:  !0 = $text, !1 = $res
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'This+%7Bis+%7B%7BPar%7Dm1%7D%7D+plus+%7B%7BPar%7Bm3a%7B%7BParm3b%7D%7D%7D%7D+a%7Dnd+%7B%7BParm4a%7C%7C%7B%7BPar%7Dm4b%7C%7C%7B%7BParm4c%7C%7C%7B%7BParm4d%7C%7CParm%7D%7D%7D%7D%7D%7D%7D%7D.'
    4     1        INIT_FCALL                                               'preg_split'
          2        SEND_VAL                                                 '%7E%28%7B%7B%28%3F%3A%28%3F%21%7B%7B%7C%7D%7D%29.%7C%28%3F1%29%29%2A%7D%7D%29%7E'
          3        SEND_VAR                                                 !0
          4        SEND_VAL                                                 -1
          5        SEND_VAL                                                 3
          6        DO_ICALL                                         $3      
          7        ASSIGN                                                   !1, $3
    5     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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