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<?php $html = <<<HTML <body class="old_attr"> <div>(content)</div> </body> HTML; $new_class = "new_class_attr"; $dom=new DOMDocument; $dom->loadHTML($html, LIBXML_HTML_NOIMPLIED | LIBXML_HTML_NODEFDTD); $body = $dom->getElementsByTagName('body')->item(0); if ($body->hasAttribute("class")) { $new_class = $body->getAttribute("class") . " " . $new_class; } $body->setAttribute("class", $new_class); echo $dom->saveHTML();
Finding entry points
Branch analysis from position: 0
2 jumps found. (Code = 43) Position 1 = 20, Position 2 = 26
Branch analysis from position: 20
1 jumps found. (Code = 62) Position 1 = -2
Branch analysis from position: 26
filename:       /in/o6XkP
function name:  (null)
number of ops:  34
compiled vars:  !0 = $html, !1 = $new_class, !2 = $dom, !3 = $body
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, '%3Cbody+class%3D%22old_attr%22%3E%0A++++%3Cdiv%3E%28content%29%3C%2Fdiv%3E%0A%3C%2Fbody%3E'
    8     1        ASSIGN                                                   !1, 'new_class_attr'
   10     2        NEW                                              $6      'DOMDocument'
          3        DO_FCALL                                      0          
          4        ASSIGN                                                   !2, $6
   11     5        INIT_METHOD_CALL                                         !2, 'loadHTML'
          6        SEND_VAR_EX                                              !0
          7        SEND_VAL_EX                                              8196
          8        DO_FCALL                                      0          
   12     9        INIT_METHOD_CALL                                         !2, 'getElementsByTagName'
         10        SEND_VAL_EX                                              'body'
         11        DO_FCALL                                      0  $10     
         12        INIT_METHOD_CALL                                         $10, 'item'
         13        SEND_VAL_EX                                              0
         14        DO_FCALL                                      0  $11     
         15        ASSIGN                                                   !3, $11
   13    16        INIT_METHOD_CALL                                         !3, 'hasAttribute'
         17        SEND_VAL_EX                                              'class'
         18        DO_FCALL                                      0  $13     
         19      > JMPZ                                                     $13, ->26
   14    20    >   INIT_METHOD_CALL                                         !3, 'getAttribute'
         21        SEND_VAL_EX                                              'class'
         22        DO_FCALL                                      0  $14     
         23        CONCAT                                           ~15     $14, '+'
         24        CONCAT                                           ~16     ~15, !1
         25        ASSIGN                                                   !1, ~16
   16    26    >   INIT_METHOD_CALL                                         !3, 'setAttribute'
         27        SEND_VAL_EX                                              'class'
         28        SEND_VAR_EX                                              !1
         29        DO_FCALL                                      0          
   17    30        INIT_METHOD_CALL                                         !2, 'saveHTML'
         31        DO_FCALL                                      0  $19     
         32        ECHO                                                     $19
         33      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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