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<?php $cleanHtml = '<div><article>foo</article><foo><foobar></foobar></foo></div>'; var_dump($cleanHtml); $cleanHtml = preg_replace("/<[a-z]+>/U", "$1\n", $cleanHtml); var_dump($cleanHtml);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/7fdb5
function name:  (null)
number of ops:  14
compiled vars:  !0 = $cleanHtml
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, '%3Cdiv%3E%3Carticle%3Efoo%3C%2Farticle%3E%3Cfoo%3E%3Cfoobar%3E%3C%2Ffoobar%3E%3C%2Ffoo%3E%3C%2Fdiv%3E'
    3     1        INIT_FCALL                                               'var_dump'
          2        SEND_VAR                                                 !0
          3        DO_ICALL                                                 
    4     4        INIT_FCALL                                               'preg_replace'
          5        SEND_VAL                                                 '%2F%3C%5Ba-z%5D%2B%3E%2FU'
          6        SEND_VAL                                                 '%241%0A'
          7        SEND_VAR                                                 !0
          8        DO_ICALL                                         $3      
          9        ASSIGN                                                   !0, $3
    5    10        INIT_FCALL                                               'var_dump'
         11        SEND_VAR                                                 !0
         12        DO_ICALL                                                 
         13      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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