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<?php $x = '{date:Ymd:-4 day}trac{date2:Ymd:-1 day}king{date:Ymd:-1 day}'; $m = array(); preg_match_all('|\{[^\}]+\}|', $x, $m); var_dump($m);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/SMLg8
function name:  (null)
number of ops:  11
compiled vars:  !0 = $x, !1 = $m
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, '%7Bdate%3AYmd%3A-4+day%7Dtrac%7Bdate2%3AYmd%3A-1+day%7Dking%7Bdate%3AYmd%3A-1+day%7D'
    5     1        ASSIGN                                                   !1, <array>
    7     2        INIT_FCALL                                               'preg_match_all'
          3        SEND_VAL                                                 '%7C%5C%7B%5B%5E%5C%7D%5D%2B%5C%7D%7C'
          4        SEND_VAR                                                 !0
          5        SEND_REF                                                 !1
          6        DO_ICALL                                                 
    9     7        INIT_FCALL                                               'var_dump'
          8        SEND_VAR                                                 !1
          9        DO_ICALL                                                 
         10      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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