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<?php $text = <<<TEXT <div class="myclass" id="id123" data-foo="bar">content</div> <div class="myclass" id="id123" data-foo="bar" >content</div> <div class="myclass" id="id123" data-foo="bar" data-baz="qux">content</div> <div class="myclass" id="id123" data-foo="bar" data-baz="qux" >content</div> TEXT; preg_match_all('~<div class="myclass" id="(.*?)" data-foo="(.*?)" ?(?:data-baz="(.*?)" ?)?>~', $text, $matches); var_export(array_slice($matches, 1));
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/gFIOB
function name:  (null)
number of ops:  14
compiled vars:  !0 = $text, !1 = $matches
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    3     0  E >   ASSIGN                                                   !0, '%3Cdiv+class%3D%22myclass%22+id%3D%22id123%22+data-foo%3D%22bar%22%3Econtent%3C%2Fdiv%3E%0A%3Cdiv+class%3D%22myclass%22+id%3D%22id123%22+data-foo%3D%22bar%22+%3Econtent%3C%2Fdiv%3E%0A%3Cdiv+class%3D%22myclass%22+id%3D%22id123%22+data-foo%3D%22bar%22+data-baz%3D%22qux%22%3Econtent%3C%2Fdiv%3E%0A%3Cdiv+class%3D%22myclass%22+id%3D%22id123%22+data-foo%3D%22bar%22+data-baz%3D%22qux%22+%3Econtent%3C%2Fdiv%3E'
   10     1        INIT_FCALL                                               'preg_match_all'
          2        SEND_VAL                                                 '%7E%3Cdiv+class%3D%22myclass%22+id%3D%22%28.%2A%3F%29%22+data-foo%3D%22%28.%2A%3F%29%22+%3F%28%3F%3Adata-baz%3D%22%28.%2A%3F%29%22+%3F%29%3F%3E%7E'
          3        SEND_VAR                                                 !0
          4        SEND_REF                                                 !1
          5        DO_ICALL                                                 
   11     6        INIT_FCALL                                               'var_export'
          7        INIT_FCALL                                               'array_slice'
          8        SEND_VAR                                                 !1
          9        SEND_VAL                                                 1
         10        DO_ICALL                                         $4      
         11        SEND_VAR                                                 $4
         12        DO_ICALL                                                 
         13      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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