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<?php $formula = "B2/@A14"; $pattern = '#@([A-Z][\d])#'; preg_match_all($pattern,$formula,$matches); var_dump($matches);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/p6aro
function name:  (null)
number of ops:  11
compiled vars:  !0 = $formula, !1 = $pattern, !2 = $matches
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, 'B2%2F%40A14'
    4     1        ASSIGN                                                   !1, '%23%40%28%5BA-Z%5D%5B%5Cd%5D%29%23'
    6     2        INIT_FCALL                                               'preg_match_all'
          3        SEND_VAR                                                 !1
          4        SEND_VAR                                                 !0
          5        SEND_REF                                                 !2
          6        DO_ICALL                                                 
    7     7        INIT_FCALL                                               'var_dump'
          8        SEND_VAR                                                 !2
          9        DO_ICALL                                                 
         10      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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