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<?php $var = array( '#tag', 'text #tag text', 'text #tag', 'text#tag', ); echo preg_replace('/#(\S{1,24}+)/u', '<$0>', $var).PHP_EOL;
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/0Fn13
function name:  (null)
number of ops:  9
compiled vars:  !0 = $var
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, <array>
    8     1        INIT_FCALL                                               'preg_replace'
          2        SEND_VAL                                                 '%2F%23%28%5CS%7B1%2C24%7D%2B%29%2Fu'
          3        SEND_VAL                                                 '%3C%240%3E'
          4        SEND_VAR                                                 !0
          5        DO_ICALL                                         $2      
          6        CONCAT                                           ~3      $2, '%0A'
          7        ECHO                                                     ~3
          8      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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