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<?php $s = '<iframe ><embed boowidth=222>fdgwidth=700dfg</embed>sfsdfsdf</iframe>'; $matches = array(); var_dump( preg_replace('~(.*<[^>]+\swidth=["\']?)(\d+)(["\']?[^>]*>.*)~', '${1}---${3}', $s) ); var_dump($matshes);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/0qaAS
function name:  (null)
number of ops:  14
compiled vars:  !0 = $s, !1 = $matches, !2 = $matshes
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, '%3Ciframe+%3E%3Cembed+boowidth%3D222%3Efdgwidth%3D700dfg%3C%2Fembed%3Esfsdfsdf%3C%2Fiframe%3E'
    3     1        ASSIGN                                                   !1, <array>
    4     2        INIT_FCALL                                               'var_dump'
          3        INIT_FCALL                                               'preg_replace'
          4        SEND_VAL                                                 '%7E%28.%2A%3C%5B%5E%3E%5D%2B%5Cswidth%3D%5B%22%27%5D%3F%29%28%5Cd%2B%29%28%5B%22%27%5D%3F%5B%5E%3E%5D%2A%3E.%2A%29%7E'
          5        SEND_VAL                                                 '%24%7B1%7D---%24%7B3%7D'
          6        SEND_VAR                                                 !0
          7        DO_ICALL                                         $5      
          8        SEND_VAR                                                 $5
          9        DO_ICALL                                                 
    5    10        INIT_FCALL                                               'var_dump'
         11        SEND_VAR                                                 !2
         12        DO_ICALL                                                 
         13      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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