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<?php $res = preg_grep('#\d#u', ['a', "1\xFF", 'c']); var_dump(preg_last_error()); var_dump($res);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/3aY3r
function name:  (null)
number of ops:  14
compiled vars:  !0 = $res
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    3     0  E >   INIT_FCALL                                                   'preg_grep'
          1        SEND_VAL                                                     '%23%5Cd%23u'
          2        SEND_VAL                                                     <array>
          3        DO_ICALL                                             $1      
          4        ASSIGN                                                       !0, $1
    5     5        INIT_FCALL                                                   'var_dump'
          6        INIT_FCALL                                                   'preg_last_error'
          7        DO_ICALL                                             $3      
          8        SEND_VAR                                                     $3
          9        DO_ICALL                                                     
    7    10        INIT_FCALL                                                   'var_dump'
         11        SEND_VAR                                                     !0
         12        DO_ICALL                                                     
         13      > RETURN                                                       1

Generated using Vulcan Logic Dumper, using php 8.5.0


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