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<?php $_content = '[iframe scrolling="no" src="https://w.soundcloud.com/player/?url=https%3A//api.soundcloud.com/tracks/163969592&color=ff5500&auto_play=false&hide_related=false&show_comments=true&show_user=true&show_reposts=false" frameborder="no" height="166" width="100%"]'; $_content = preg_match('#[<\[]iframe [^>\]]*?soundcloud.com[^>\]]*?[>\]]#i', $_content, $matches); var_dump($matches);
Finding entry points
Branch analysis from position: 0
1 jumps found. (Code = 62) Position 1 = -2
filename:       /in/6jZEu
function name:  (null)
number of ops:  11
compiled vars:  !0 = $_content, !1 = $matches
line      #* E I O op                           fetch          ext  return  operands
-------------------------------------------------------------------------------------
    2     0  E >   ASSIGN                                                   !0, '%5Biframe+scrolling%3D%22no%22+src%3D%22https%3A%2F%2Fw.soundcloud.com%2Fplayer%2F%3Furl%3Dhttps%253A%2F%2Fapi.soundcloud.com%2Ftracks%2F163969592%26color%3Dff5500%26auto_play%3Dfalse%26hide_related%3Dfalse%26show_comments%3Dtrue%26show_user%3Dtrue%26show_reposts%3Dfalse%22+frameborder%3D%22no%22+height%3D%22166%22+width%3D%22100%25%22%5D'
    3     1        INIT_FCALL                                               'preg_match'
          2        SEND_VAL                                                 '%23%5B%3C%5C%5B%5Diframe+%5B%5E%3E%5C%5D%5D%2A%3Fsoundcloud.com%5B%5E%3E%5C%5D%5D%2A%3F%5B%3E%5C%5D%5D%23i'
          3        SEND_VAR                                                 !0
          4        SEND_REF                                                 !1
          5        DO_ICALL                                         $3      
          6        ASSIGN                                                   !0, $3
    4     7        INIT_FCALL                                               'var_dump'
          8        SEND_VAR                                                 !1
          9        DO_ICALL                                                 
         10      > RETURN                                                   1

Generated using Vulcan Logic Dumper, using php 8.0.0


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