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<?php $subject = '512345678'; $failingPattern = '/^(?:[3-5789]\d{8})$/x'; $result = preg_match($failingPattern , $subject, $groups, PREG_OFFSET_CAPTURE); var_dump($result, $groups);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/0SMiZ
function name:  (null)
number of ops:  14
compiled vars:  !0 = $subject, !1 = $failingPattern, !2 = $result, !3 = $groups
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                       !0, '512345678'
    5     1        ASSIGN                                                       !1, '%2F%5E%28%3F%3A%5B3-5789%5D%5Cd%7B8%7D%29%24%2Fx'
    7     2        INIT_FCALL                                                   'preg_match'
          3        SEND_VAR                                                     !1
          4        SEND_VAR                                                     !0
          5        SEND_REF                                                     !3
          6        SEND_VAL                                                     256
          7        DO_ICALL                                             $6      
          8        ASSIGN                                                       !2, $6
    9     9        INIT_FCALL                                                   'var_dump'
         10        SEND_VAR                                                     !2
         11        SEND_VAR                                                     !3
         12        DO_ICALL                                                     
         13      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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