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<?php echo preg_match( '@(\d+)@', '1-ะน', $m ).PHP_EOL; var_dump( $m );
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/8fP5C
function name:  (null)
number of ops:  11
compiled vars:  !0 = $m
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                               'preg_match'
          1        SEND_VAL                                                 '%40%28%5Cd%2B%29%40'
          2        SEND_VAL                                                 '1-%D0%B9'
          3        SEND_REF                                                 !0
          4        DO_ICALL                                         $1      
          5        CONCAT                                           ~2      $1, '%0A'
          6        ECHO                                                     ~2
    4     7        INIT_FCALL                                               'var_dump'
          8        SEND_VAR                                                 !0
          9        DO_ICALL                                                 
         10      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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