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<?php $num = "636-227-8787"; if (preg_match('/^.*?(\d{3}).*?(\d{3}).*?(\d{4}).*/', $num, $matches)) { var_dump($matches); }
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 7, Position 2 = 10
Branch analysis from position: 7
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 10
filename:       /in/KbJvL
function name:  (null)
number of ops:  11
compiled vars:  !0 = $num, !1 = $matches
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, '636-227-8787'
    5     1        INIT_FCALL                                               'preg_match'
          2        SEND_VAL                                                 '%2F%5E.%2A%3F%28%5Cd%7B3%7D%29.%2A%3F%28%5Cd%7B3%7D%29.%2A%3F%28%5Cd%7B4%7D%29.%2A%2F'
          3        SEND_VAR                                                 !0
          4        SEND_REF                                                 !1
          5        DO_ICALL                                         $3      
          6      > JMPZ                                                     $3, ->10
    7     7    >   INIT_FCALL                                               'var_dump'
          8        SEND_VAR                                                 !1
          9        DO_ICALL                                                 
    8    10    > > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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