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<?php $html = '<ul class="foo"> <li>Item 1</li> <li>Item 2</li> <li>Item 3</li> </ul> <ul> <li>Item 1</li> <li>Item 2</li> <li>Item 3</li> </ul> <ul class="foo"> <li>Item 1</li> <li>Item 2</li> <li>Item 3</li> </ul>'; $newHtml = preg_replace_callback("/(?<=<ul\sclass=\"foo\">).*?(?=<\/ul>)/s", function($ma){ return preg_replace("/(?<=<li>)(.*)(?=<\/li>)/", '<svg class="icon"><use xlink:href="#foo"></use></svg>$1', $ma[0]); }, $html); echo $newHtml;
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/IOokf
function name:  (null)
number of ops:  10
compiled vars:  !0 = $html, !1 = $newHtml
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                       !0, '%3Cul+class%3D%22foo%22%3E%0A++%3Cli%3EItem+1%3C%2Fli%3E%0A++%3Cli%3EItem+2%3C%2Fli%3E%0A++%3Cli%3EItem+3%3C%2Fli%3E%0A%3C%2Ful%3E%0A%3Cul%3E%0A++%3Cli%3EItem+1%3C%2Fli%3E%0A++%3Cli%3EItem+2%3C%2Fli%3E%0A++%3Cli%3EItem+3%3C%2Fli%3E%0A%3C%2Ful%3E++++%0A%3Cul+class%3D%22foo%22%3E%0A++%3Cli%3EItem+1%3C%2Fli%3E%0A++%3Cli%3EItem+2%3C%2Fli%3E%0A++%3Cli%3EItem+3%3C%2Fli%3E%0A%3C%2Ful%3E'
   19     1        INIT_FCALL                                                   'preg_replace_callback'
          2        SEND_VAL                                                     '%2F%28%3F%3C%3D%3Cul%5Csclass%3D%22foo%22%3E%29.%2A%3F%28%3F%3D%3C%5C%2Ful%3E%29%2Fs'
          3        DECLARE_LAMBDA_FUNCTION                              ~3      [0]
   21     4        SEND_VAL                                                     ~3
          5        SEND_VAR                                                     !0
   19     6        DO_ICALL                                             $4      
          7        ASSIGN                                                       !1, $4
   23     8        ECHO                                                         !1
   24     9      > RETURN                                                       1


Dynamic Functions:
Dynamic Function 0
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/IOokf
function name:  {closure:/in/IOokf:19}
number of ops:  6
compiled vars:  !0 = $ma
line      #* E I O op                               fetch          ext  return  operands
-----------------------------------------------------------------------------------------
   19     0  E >   RECV                                                 !0      
   20     1        FETCH_DIM_R                                          ~1      !0, 0
          2        FRAMELESS_ICALL_3                preg_replace        ~2      '%2F%28%3F%3C%3D%3Cli%3E%29%28.%2A%29%28%3F%3D%3C%5C%2Fli%3E%29%2F', '%3Csvg+class%3D%22icon%22%3E%3Cuse+xlink%3Ahref%3D%22%23foo%22%3E%3C%2Fuse%3E%3C%2Fsvg%3E%241'
          3        OP_DATA                                                      ~1
          4      > RETURN                                                       ~2
   21     5*     > RETURN                                                       null

End of Dynamic Function 0

Generated using Vulcan Logic Dumper, using php 8.5.0


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